Combo pre-amp
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Has there been any information of Elecraft producing a 6+10 meter ore-amp?
Seems I read a hint in this months ago. 73, Jack ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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If you find one of those ore amps, let me know where I can get one. I
have some gold I'd like to amplify. ;o) 73, Tom Amateur Radio Operator N5GE ARRL Lifetime Member QCWA Lifetime Member On Fri, 17 May 2013 16:42:01 -0400, Jack Berry <[hidden email]> wrote: >Has there been any information of Elecraft producing a 6+10 meter ore-amp? >Seems I read a hint in this months ago. > >73, >Jack >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:[hidden email] > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html Tom Amateur Radio Operator N5GE ARRL Lifetime Member QCWA Lifetime Member ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Amateur Radio Operator N5GE
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Yes I'm waiting also if not the combo then at the very least a 10m one, 6m
preamps are not that hard to find but I would buy the combos for both of my K3's. 73, Fred/N0AZZ K3 Ser #'s 6730/5299--KX3 # 2573--K2/100--KAT100 P3/SVGA--KPA500--KAT500--W2 -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Tom H Childers Sent: Friday, May 17, 2013 10:52 PM To: Jack Berry Cc: 'Elecraft Mailing List' Subject: Re: [Elecraft] Combo pre-amp If you find one of those ore amps, let me know where I can get one. I have some gold I'd like to amplify. ;o) 73, Tom Amateur Radio Operator N5GE ARRL Lifetime Member QCWA Lifetime Member On Fri, 17 May 2013 16:42:01 -0400, Jack Berry <[hidden email]> wrote: >Has there been any information of Elecraft producing a 6+10 meter ore-amp? >Seems I read a hint in this months ago. > >73, >Jack >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:[hidden email] > >This list hosted by: http://www.qsl.net Please help support this email >list: http://www.qsl.net/donate.html Tom Amateur Radio Operator N5GE ARRL Lifetime Member QCWA Lifetime Member ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.2904 / Virus Database: 3162/6330 - Release Date: 05/16/13 ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.2904 / Virus Database: 3162/6330 - Release Date: 05/16/13 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by N5GE
Spoke with Eric earlier today. The 6/10 meter per-amp is under way. He hopes to have them available in two to three months. I don't have pricing info.
> > On Fri, 17 May 2013 16:42:01 -0400, Jack Berry <[hidden email]> > wrote: > >> Has there been any information of Elecraft producing a 6+10 meter ore-amp? >> Seems I read a hint in this months ago. >> >> 73, >> Jack >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > 73, > Tom > Amateur Radio Operator N5GE > ARRL Lifetime Member > QCWA Lifetime Member > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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Well I do hope there will be a version for 10M perhaps that will install
within the K3. Much as it would be nice to have I am not going to buy more boxes needing to be plugged in, cabled or whatever. Whilst I understand some folks have space available and can wire in as many boxes as are available, those of us who operate portable tire very quickly of sorting cables, boxes and the resultant tangled leads. I guess I will have to wait and see what is produced but another external box such as the 6M pre-amp which protrudes too far and can easily be knocked around is a non starter for me no matter that I could use it, it is what it is, a box too far. Gary On 19 May 2013 03:32, Jack Berry <[hidden email]> wrote: > Spoke with Eric earlier today. The 6/10 meter per-amp is under way. He > hopes to have them available in two to three months. I don't have pricing > info. > > > > > On Fri, 17 May 2013 16:42:01 -0400, Jack Berry <[hidden email]> > > wrote: > > > >> Has there been any information of Elecraft producing a 6+10 meter > ore-amp? > >> Seems I read a hint in this months ago. > >> > >> 73, > >> Jack > >> ______________________________________________________________ > >> Elecraft mailing list > >> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >> Help: http://mailman.qth.net/mmfaq.htm > >> Post: mailto:[hidden email] > >> > >> This list hosted by: http://www.qsl.net > >> Please help support this email list: http://www.qsl.net/donate.html > > 73, > > Tom > > Amateur Radio Operator N5GE > > ARRL Lifetime Member > > QCWA Lifetime Member > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- *Gary - VK1ZZ Skype: Gary.VK1ZZ Motorhome Portable The Shack* *Elecraft K3 P3 Panadapter KPA500FT KAT500FT** KX3-K * ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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This sounds like a lack of creative thinking. How about using two 90 degree
BNC elbows on the back of the radio and a couple of BNC jumpers. You can put the preamp anywhere... even in the next room is that is your fancy. Also, you might try one of the 50+ preamps that are already available by a variety of companies with ultra-low noise figures. I'm not sure I need a preamp to take up the space of my existing 2 meter module. Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ Owner - Operator Big Signal Ranch Staunton, Illinois email: [hidden email] -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Jeff Cochrane Sent: Saturday, May 25, 2013 7:03 PM To: [hidden email] Subject: Re: [Elecraft] Combo pre-amp Agreed Gary, I too would be interested in an internal 10M pre-amp (or an internal combo 6-10M pre-amp). I already have the PR6 but like you say it (in stock form) protrudes so far out behind the rig that it almost impossible to use for portable work. Mounting it internally is the way to go and I reckon a combo pre-amp would sit nicely where the internal 2M transverter normally goes. Jeff Cochrane - VK4XA Gary Gregory-2 wrote > Well I do hope there will be a version for 10M perhaps that will install > within the K3. Much as it would be nice to have I am not going to buy more > boxes needing to be plugged in, cabled or whatever. > > Whilst I understand some folks have space available and can wire in as > many > boxes as are available, those of us who operate portable tire very quickly > of sorting cables, boxes and the resultant tangled leads. > > I guess I will have to wait and see what is produced but another external > box such as the 6M pre-amp which protrudes too far and can easily be > knocked around is a non starter for me no matter that I could use it, it > is > what it is, a box too far. > > Gary > > -- > *Gary - VK1ZZ > Skype: Gary.VK1ZZ > Motorhome Portable > The Shack* > *Elecraft K3 > P3 Panadapter > KPA500FT > KAT500FT** > KX3-K > * > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto: > Elecraft@.qth > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ----- Jeff Cochrane - VK4XA East Innisfail Queensland Australia K3 #4767 -- View this message in context: http://elecraft.365791.n2.nabble.com/Combo-pre-amp-tp7573740p7574221.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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I don't wish to flog a dead horse any further, however, choice is something
it seems everyone on this list is after. So what if a K3 needs to NOT have a 2M transverter to fit a combo pre-amp?....there are many K3's in the world not fitted with 2M. This is a choice made by the original owner I guess which is what it is, a choice. I fully appreciate everyone's point of view, but I would hazard a guess I am not alone in wanting an internal unit as a CHOICE, not at the expense of taking away other folks right to choose. Wayne has stated Elecraft's case and that is there is not enough room but his statement is qualified by the mention of the 2M option which is a customer choice right? So, I will continue to want an internal pre-amp and it does not need to be for 6M as I don't operate there either. This is MY choice and does not hold sway with the masses but it is my choice after all. You mention remote install, fine, but again it is still another cable and still yet another box to cart around. Setup on a table (standard picnic size) the depth of the table means you need to have the K-Line right on the rear edge and the 6M pre-amp protrudes far enough back that if you are up against a barrier of some sort, the cables push the K-Line forward and reduce the work space area such that little room is left to operate in a comfortable manner. I could pontificate forever on the drawbacks when operating portable but I am probably not a member of the right choir. Maybe an OEM will come up with a 'plug-in' internal 10M pre-amp designed for a K3.....now that would solve everything for me and I wouldn't have to plead my case....:-) It's all about choice folks! 73 Gary On 26 May 2013 10:32, Walter Underwood <[hidden email]> wrote: > The original poster mentioned "those of us who operate portable". Running > cables to the next room does not make that any simpler. > > wunder > K6WRU > > On May 25, 2013, at 5:13 PM, Dr. William J. Schmidt, II wrote: > > > This sounds like a lack of creative thinking. How about using two 90 > degree > > BNC elbows on the back of the radio and a couple of BNC jumpers. You can > > put the preamp anywhere... even in the next room is that is your fancy. > > Also, you might try one of the 50+ preamps that are already available by > a > > variety of companies with ultra-low noise figures. I'm not sure I need a > > preamp to take up the space of my existing 2 meter module. > > > > > > Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ > > > > Owner - Operator > > Big Signal Ranch > > Staunton, Illinois > > > > email: [hidden email] > > > > -----Original Message----- > > From: [hidden email] > > [mailto:[hidden email]] On Behalf Of Jeff Cochrane > > Sent: Saturday, May 25, 2013 7:03 PM > > To: [hidden email] > > Subject: Re: [Elecraft] Combo pre-amp > > > > Agreed Gary, > > I too would be interested in an internal 10M pre-amp (or an internal > combo > > 6-10M pre-amp). > > I already have the PR6 but like you say it (in stock form) protrudes so > far > > out behind the rig that it almost impossible to use for portable work. > > Mounting it internally is the way to go and I reckon a combo pre-amp > would > > sit nicely where the internal 2M transverter normally goes. > > > > Jeff Cochrane - VK4XA > > > > > > > > Gary Gregory-2 wrote > >> Well I do hope there will be a version for 10M perhaps that will install > >> within the K3. Much as it would be nice to have I am not going to buy > more > >> boxes needing to be plugged in, cabled or whatever. > >> > >> Whilst I understand some folks have space available and can wire in as > >> many > >> boxes as are available, those of us who operate portable tire very > quickly > >> of sorting cables, boxes and the resultant tangled leads. > >> > >> I guess I will have to wait and see what is produced but another > external > >> box such as the 6M pre-amp which protrudes too far and can easily be > >> knocked around is a non starter for me no matter that I could use it, it > >> is > >> what it is, a box too far. > >> > >> Gary > >> > >> -- > >> *Gary - VK1ZZ > >> Skype: Gary.VK1ZZ > >> Motorhome Portable > >> The Shack* > >> *Elecraft K3 > >> P3 Panadapter > >> KPA500FT > >> KAT500FT** > >> KX3-K > >> * > >> ______________________________________________________________ > >> Elecraft mailing list > >> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >> Help: http://mailman.qth.net/mmfaq.htm > >> Post: mailto: > > > >> Elecraft@.qth > > > >> > >> This list hosted by: http://www.qsl.net > >> Please help support this email list: http://www.qsl.net/donate.html > > > > > > > > > > > > ----- > > Jeff Cochrane - VK4XA > > East Innisfail > > Queensland > > Australia > > K3 #4767 > > > > -- > > View this message in context: > > > http://elecraft.365791.n2.nabble.com/Combo-pre-amp-tp7573740p7574221.html > > Sent from the Elecraft mailing list archive at Nabble.com. > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:[hidden email] > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > > > ______________________________________________________________ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:[hidden email] > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > -- > Walter Underwood > [hidden email] > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- *Gary - VK1ZZ Skype: Gary.VK1ZZ Motorhome Portable The Shack* *Elecraft K3 P3 Panadapter KPA500FT KAT500FT** KX3-K * ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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> So, I will continue to want an internal pre-amp and it does not need > to be for 6M as I don't operate there either. This is MY choice and > does not hold sway with the masses but it is my choice after all. I agree that an internal preamp (or premps) would be ideal. However, in addition to the preamp(s) Elecraft would need to provide *another* design for the KXV3A - one that switches the RX ANT IN/OUT connections to internal jacks - as neither the original KXV3 or current KXV3A have that capability. 73, ... Joe, W4TV On 5/25/2013 9:24 PM, Gary Gregory wrote: > I don't wish to flog a dead horse any further, however, choice is something > it seems everyone on this list is after. > > So what if a K3 needs to NOT have a 2M transverter to fit a combo > pre-amp?....there are many K3's in the world not fitted with 2M. This is a > choice made by the original owner I guess which is what it is, a choice. I > fully appreciate everyone's point of view, but I would hazard a guess I am > not alone in wanting an internal unit as a CHOICE, not at the expense of > taking away other folks right to choose. > > Wayne has stated Elecraft's case and that is there is not enough room but > his statement is qualified by the mention of the 2M option which is a > customer choice right? > > So, I will continue to want an internal pre-amp and it does not need to be > for 6M as I don't operate there either. This is MY choice and does not hold > sway with the masses but it is my choice after all. > > You mention remote install, fine, but again it is still another cable and > still yet another box to cart around. Setup on a table (standard picnic > size) the depth of the table means you need to have the K-Line right on the > rear edge and the 6M pre-amp protrudes far enough back that if you are up > against a barrier of some sort, the cables push the K-Line forward and > reduce the work space area such that little room is left to operate in a > comfortable manner. > > I could pontificate forever on the drawbacks when operating portable but I > am probably not a member of the right choir. > > Maybe an OEM will come up with a 'plug-in' internal 10M pre-amp designed > for a K3.....now that would solve everything for me and I wouldn't have to > plead my case....:-) > > It's all about choice folks! > > 73 > > Gary > > On 26 May 2013 10:32, Walter Underwood <[hidden email]> wrote: > >> The original poster mentioned "those of us who operate portable". Running >> cables to the next room does not make that any simpler. >> >> wunder >> K6WRU >> >> On May 25, 2013, at 5:13 PM, Dr. William J. Schmidt, II wrote: >> >>> This sounds like a lack of creative thinking. How about using two 90 >> degree >>> BNC elbows on the back of the radio and a couple of BNC jumpers. You can >>> put the preamp anywhere... even in the next room is that is your fancy. >>> Also, you might try one of the 50+ preamps that are already available by >> a >>> variety of companies with ultra-low noise figures. I'm not sure I need a >>> preamp to take up the space of my existing 2 meter module. >>> >>> >>> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ >>> >>> Owner - Operator >>> Big Signal Ranch >>> Staunton, Illinois >>> >>> email: [hidden email] >>> >>> -----Original Message----- >>> From: [hidden email] >>> [mailto:[hidden email]] On Behalf Of Jeff Cochrane >>> Sent: Saturday, May 25, 2013 7:03 PM >>> To: [hidden email] >>> Subject: Re: [Elecraft] Combo pre-amp >>> >>> Agreed Gary, >>> I too would be interested in an internal 10M pre-amp (or an internal >> combo >>> 6-10M pre-amp). >>> I already have the PR6 but like you say it (in stock form) protrudes so >> far >>> out behind the rig that it almost impossible to use for portable work. >>> Mounting it internally is the way to go and I reckon a combo pre-amp >> would >>> sit nicely where the internal 2M transverter normally goes. >>> >>> Jeff Cochrane - VK4XA >>> >>> >>> >>> Gary Gregory-2 wrote >>>> Well I do hope there will be a version for 10M perhaps that will install >>>> within the K3. Much as it would be nice to have I am not going to buy >> more >>>> boxes needing to be plugged in, cabled or whatever. >>>> >>>> Whilst I understand some folks have space available and can wire in as >>>> many >>>> boxes as are available, those of us who operate portable tire very >> quickly >>>> of sorting cables, boxes and the resultant tangled leads. >>>> >>>> I guess I will have to wait and see what is produced but another >> external >>>> box such as the 6M pre-amp which protrudes too far and can easily be >>>> knocked around is a non starter for me no matter that I could use it, it >>>> is >>>> what it is, a box too far. >>>> >>>> Gary >>>> >>>> -- >>>> *Gary - VK1ZZ >>>> Skype: Gary.VK1ZZ >>>> Motorhome Portable >>>> The Shack* >>>> *Elecraft K3 >>>> P3 Panadapter >>>> KPA500FT >>>> KAT500FT** >>>> KX3-K >>>> * >>>> ______________________________________________________________ >>>> Elecraft mailing list >>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>>> Help: http://mailman.qth.net/mmfaq.htm >>>> Post: mailto: >>> >>>> Elecraft@.qth >>> >>>> >>>> This list hosted by: http://www.qsl.net >>>> Please help support this email list: http://www.qsl.net/donate.html >>> >>> >>> >>> >>> >>> ----- >>> Jeff Cochrane - VK4XA >>> East Innisfail >>> Queensland >>> Australia >>> K3 #4767 >>> >>> -- >>> View this message in context: >>> >> http://elecraft.365791.n2.nabble.com/Combo-pre-amp-tp7573740p7574221.html >>> Sent from the Elecraft mailing list archive at Nabble.com. >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >> >> -- >> Walter Underwood >> [hidden email] >> >> >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > > > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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Hi Joe,
Gee...Shhhhh....let's not let that technical inconvenience reduce in any way my hope for a cure to my sometimes demented desires....:-) Of course you are quite correct Joe. Point taken mate. 73 Gary On 26 May 2013 12:06, Joe Subich, W4TV <[hidden email]> wrote: > > So, I will continue to want an internal pre-amp and it does not need >> to be for 6M as I don't operate there either. This is MY choice and >> does not hold sway with the masses but it is my choice after all. >> > > I agree that an internal preamp (or premps) would be ideal. However, > in addition to the preamp(s) Elecraft would need to provide *another* > design for the KXV3A - one that switches the RX ANT IN/OUT connections > to internal jacks - as neither the original KXV3 or current KXV3A have > that capability. > > 73, > > ... Joe, W4TV > > > On 5/25/2013 9:24 PM, Gary Gregory wrote: > >> I don't wish to flog a dead horse any further, however, choice is >> something >> it seems everyone on this list is after. >> >> So what if a K3 needs to NOT have a 2M transverter to fit a combo >> pre-amp?....there are many K3's in the world not fitted with 2M. This is a >> choice made by the original owner I guess which is what it is, a choice. I >> fully appreciate everyone's point of view, but I would hazard a guess I am >> not alone in wanting an internal unit as a CHOICE, not at the expense of >> taking away other folks right to choose. >> >> Wayne has stated Elecraft's case and that is there is not enough room but >> his statement is qualified by the mention of the 2M option which is a >> customer choice right? >> >> So, I will continue to want an internal pre-amp and it does not need to be >> for 6M as I don't operate there either. This is MY choice and does not >> hold >> sway with the masses but it is my choice after all. >> >> You mention remote install, fine, but again it is still another cable and >> still yet another box to cart around. Setup on a table (standard picnic >> size) the depth of the table means you need to have the K-Line right on >> the >> rear edge and the 6M pre-amp protrudes far enough back that if you are up >> against a barrier of some sort, the cables push the K-Line forward and >> reduce the work space area such that little room is left to operate in a >> comfortable manner. >> >> I could pontificate forever on the drawbacks when operating portable but I >> am probably not a member of the right choir. >> >> Maybe an OEM will come up with a 'plug-in' internal 10M pre-amp designed >> for a K3.....now that would solve everything for me and I wouldn't have to >> plead my case....:-) >> >> It's all about choice folks! >> >> 73 >> >> Gary >> >> On 26 May 2013 10:32, Walter Underwood <[hidden email]> wrote: >> >> The original poster mentioned "those of us who operate portable". Running >>> cables to the next room does not make that any simpler. >>> >>> wunder >>> K6WRU >>> >>> On May 25, 2013, at 5:13 PM, Dr. William J. Schmidt, II wrote: >>> >>> This sounds like a lack of creative thinking. How about using two 90 >>>> >>> degree >>> >>>> BNC elbows on the back of the radio and a couple of BNC jumpers. You >>>> can >>>> put the preamp anywhere... even in the next room is that is your fancy. >>>> Also, you might try one of the 50+ preamps that are already available by >>>> >>> a >>> >>>> variety of companies with ultra-low noise figures. I'm not sure I need >>>> a >>>> preamp to take up the space of my existing 2 meter module. >>>> >>>> >>>> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ >>>> >>>> Owner - Operator >>>> Big Signal Ranch >>>> Staunton, Illinois >>>> >>>> email: [hidden email] >>>> >>>> -----Original Message----- >>>> From: [hidden email].**net<[hidden email]> >>>> [mailto:elecraft-bounces@**mailman.qth.net<[hidden email]>] >>>> On Behalf Of Jeff Cochrane >>>> Sent: Saturday, May 25, 2013 7:03 PM >>>> To: [hidden email] >>>> Subject: Re: [Elecraft] Combo pre-amp >>>> >>>> Agreed Gary, >>>> I too would be interested in an internal 10M pre-amp (or an internal >>>> >>> combo >>> >>>> 6-10M pre-amp). >>>> I already have the PR6 but like you say it (in stock form) protrudes so >>>> >>> far >>> >>>> out behind the rig that it almost impossible to use for portable work. >>>> Mounting it internally is the way to go and I reckon a combo pre-amp >>>> >>> would >>> >>>> sit nicely where the internal 2M transverter normally goes. >>>> >>>> Jeff Cochrane - VK4XA >>>> >>>> >>>> >>>> Gary Gregory-2 wrote >>>> >>>>> Well I do hope there will be a version for 10M perhaps that will >>>>> install >>>>> within the K3. Much as it would be nice to have I am not going to buy >>>>> >>>> more >>> >>>> boxes needing to be plugged in, cabled or whatever. >>>>> >>>>> Whilst I understand some folks have space available and can wire in as >>>>> many >>>>> boxes as are available, those of us who operate portable tire very >>>>> >>>> quickly >>> >>>> of sorting cables, boxes and the resultant tangled leads. >>>>> >>>>> I guess I will have to wait and see what is produced but another >>>>> >>>> external >>> >>>> box such as the 6M pre-amp which protrudes too far and can easily be >>>>> knocked around is a non starter for me no matter that I could use it, >>>>> it >>>>> is >>>>> what it is, a box too far. >>>>> >>>>> Gary >>>>> >>>>> -- >>>>> *Gary - VK1ZZ >>>>> Skype: Gary.VK1ZZ >>>>> Motorhome Portable >>>>> The Shack* >>>>> *Elecraft K3 >>>>> P3 Panadapter >>>>> KPA500FT >>>>> KAT500FT** >>>>> KX3-K >>>>> * >>>>> ______________________________**______________________________**__ >>>>> Elecraft mailing list >>>>> Home: http://mailman.qth.net/**mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>>>> Help: http://mailman.qth.net/mmfaq.**htm<http://mailman.qth.net/mmfaq.htm> >>>>> Post: mailto: >>>>> >>>> >>>> Elecraft@.qth >>>>> >>>> >>>> >>>>> This list hosted by: http://www.qsl.net >>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>> >>>> >>>> >>>> >>>> >>>> >>>> ----- >>>> Jeff Cochrane - VK4XA >>>> East Innisfail >>>> Queensland >>>> Australia >>>> K3 #4767 >>>> >>>> -- >>>> View this message in context: >>>> >>>> http://elecraft.365791.n2.**nabble.com/Combo-pre-amp-** >>> tp7573740p7574221.html<http://elecraft.365791.n2.nabble.com/Combo-pre-amp-tp7573740p7574221.html> >>> >>>> Sent from the Elecraft mailing list archive at Nabble.com. >>>> ______________________________**______________________________**__ >>>> Elecraft mailing list >>>> Home: http://mailman.qth.net/**mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>>> Help: http://mailman.qth.net/mmfaq.**htm<http://mailman.qth.net/mmfaq.htm> >>>> Post: mailto:[hidden email].**net <[hidden email]> >>>> >>>> This list hosted by: http://www.qsl.net >>>> Please help support this email list: http://www.qsl.net/donate.html >>>> >>>> ______________________________**______________________________**__ >>>> Elecraft mailing list >>>> Home: http://mailman.qth.net/**mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>>> Help: http://mailman.qth.net/mmfaq.**htm<http://mailman.qth.net/mmfaq.htm> >>>> Post: mailto:[hidden email].**net <[hidden email]> >>>> >>>> This list hosted by: http://www.qsl.net >>>> Please help support this email list: http://www.qsl.net/donate.html >>>> >>> >>> -- >>> Walter Underwood >>> [hidden email] >>> >>> >>> >>> ______________________________**______________________________**__ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/**mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>> Help: http://mailman.qth.net/mmfaq.**htm<http://mailman.qth.net/mmfaq.htm> >>> Post: mailto:[hidden email].**net <[hidden email]> >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> >>> >> >> >> -- *Gary - VK1ZZ Skype: Gary.VK1ZZ Motorhome Portable The Shack* *Elecraft K3 P3 Panadapter KPA500FT KAT500FT** KX3-K * ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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> let's not let that technical inconvenience reduce in any > way my hope for a cure to my sometimes demented desires....:-) I'm not saying it isn't possible ... takes one additional relay and two connectors. There are even couple unused control lines on the KXV3A that could be used to control the added relay and switch bands (10/12 and 6 M) if necessary. 73, ... Joe, W4TV On 5/25/2013 10:13 PM, Gary Gregory wrote: > Hi Joe, > > Gee...Shhhhh....let's not let that technical inconvenience reduce in any > way my hope for a cure to my sometimes demented desires....:-) > > Of course you are quite correct Joe. Point taken mate. > > 73 > > Gary > > On 26 May 2013 12:06, Joe Subich, W4TV <[hidden email]> wrote: > >> >> So, I will continue to want an internal pre-amp and it does not need >>> to be for 6M as I don't operate there either. This is MY choice and >>> does not hold sway with the masses but it is my choice after all. >>> >> >> I agree that an internal preamp (or premps) would be ideal. However, >> in addition to the preamp(s) Elecraft would need to provide *another* >> design for the KXV3A - one that switches the RX ANT IN/OUT connections >> to internal jacks - as neither the original KXV3 or current KXV3A have >> that capability. >> >> 73, >> >> ... Joe, W4TV >> >> >> On 5/25/2013 9:24 PM, Gary Gregory wrote: >> >>> I don't wish to flog a dead horse any further, however, choice is >>> something >>> it seems everyone on this list is after. >>> >>> So what if a K3 needs to NOT have a 2M transverter to fit a combo >>> pre-amp?....there are many K3's in the world not fitted with 2M. This is a >>> choice made by the original owner I guess which is what it is, a choice. I >>> fully appreciate everyone's point of view, but I would hazard a guess I am >>> not alone in wanting an internal unit as a CHOICE, not at the expense of >>> taking away other folks right to choose. >>> >>> Wayne has stated Elecraft's case and that is there is not enough room but >>> his statement is qualified by the mention of the 2M option which is a >>> customer choice right? >>> >>> So, I will continue to want an internal pre-amp and it does not need to be >>> for 6M as I don't operate there either. This is MY choice and does not >>> hold >>> sway with the masses but it is my choice after all. >>> >>> You mention remote install, fine, but again it is still another cable and >>> still yet another box to cart around. Setup on a table (standard picnic >>> size) the depth of the table means you need to have the K-Line right on >>> the >>> rear edge and the 6M pre-amp protrudes far enough back that if you are up >>> against a barrier of some sort, the cables push the K-Line forward and >>> reduce the work space area such that little room is left to operate in a >>> comfortable manner. >>> >>> I could pontificate forever on the drawbacks when operating portable but I >>> am probably not a member of the right choir. >>> >>> Maybe an OEM will come up with a 'plug-in' internal 10M pre-amp designed >>> for a K3.....now that would solve everything for me and I wouldn't have to >>> plead my case....:-) >>> >>> It's all about choice folks! >>> >>> 73 >>> >>> Gary >>> >>> On 26 May 2013 10:32, Walter Underwood <[hidden email]> wrote: >>> >>> The original poster mentioned "those of us who operate portable". Running >>>> cables to the next room does not make that any simpler. >>>> >>>> wunder >>>> K6WRU >>>> >>>> On May 25, 2013, at 5:13 PM, Dr. William J. Schmidt, II wrote: >>>> >>>> This sounds like a lack of creative thinking. How about using two 90 >>>>> >>>> degree >>>> >>>>> BNC elbows on the back of the radio and a couple of BNC jumpers. You >>>>> can >>>>> put the preamp anywhere... even in the next room is that is your fancy. >>>>> Also, you might try one of the 50+ preamps that are already available by >>>>> >>>> a >>>> >>>>> variety of companies with ultra-low noise figures. I'm not sure I need >>>>> a >>>>> preamp to take up the space of my existing 2 meter module. >>>>> >>>>> >>>>> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ >>>>> >>>>> Owner - Operator >>>>> Big Signal Ranch >>>>> Staunton, Illinois >>>>> >>>>> email: [hidden email] >>>>> >>>>> -----Original Message----- >>>>> From: [hidden email].**net<[hidden email]> >>>>> [mailto:elecraft-bounces@**mailman.qth.net<[hidden email]>] >>>>> On Behalf Of Jeff Cochrane >>>>> Sent: Saturday, May 25, 2013 7:03 PM >>>>> To: [hidden email] >>>>> Subject: Re: [Elecraft] Combo pre-amp >>>>> >>>>> Agreed Gary, >>>>> I too would be interested in an internal 10M pre-amp (or an internal >>>>> >>>> combo >>>> >>>>> 6-10M pre-amp). >>>>> I already have the PR6 but like you say it (in stock form) protrudes so >>>>> >>>> far >>>> >>>>> out behind the rig that it almost impossible to use for portable work. >>>>> Mounting it internally is the way to go and I reckon a combo pre-amp >>>>> >>>> would >>>> >>>>> sit nicely where the internal 2M transverter normally goes. >>>>> >>>>> Jeff Cochrane - VK4XA >>>>> >>>>> >>>>> >>>>> Gary Gregory-2 wrote >>>>> >>>>>> Well I do hope there will be a version for 10M perhaps that will >>>>>> install >>>>>> within the K3. Much as it would be nice to have I am not going to buy >>>>>> >>>>> more >>>> >>>>> boxes needing to be plugged in, cabled or whatever. >>>>>> >>>>>> Whilst I understand some folks have space available and can wire in as >>>>>> many >>>>>> boxes as are available, those of us who operate portable tire very >>>>>> >>>>> quickly >>>> >>>>> of sorting cables, boxes and the resultant tangled leads. >>>>>> >>>>>> I guess I will have to wait and see what is produced but another >>>>>> >>>>> external >>>> >>>>> box such as the 6M pre-amp which protrudes too far and can easily be >>>>>> knocked around is a non starter for me no matter that I could use it, >>>>>> it >>>>>> is >>>>>> what it is, a box too far. >>>>>> >>>>>> Gary >>>>>> >>>>>> -- >>>>>> *Gary - VK1ZZ >>>>>> Skype: Gary.VK1ZZ >>>>>> Motorhome Portable >>>>>> The Shack* >>>>>> *Elecraft K3 >>>>>> P3 Panadapter >>>>>> KPA500FT >>>>>> KAT500FT** >>>>>> KX3-K >>>>>> * >>>>>> ______________________________**______________________________**__ >>>>>> Elecraft mailing list >>>>>> Home: http://mailman.qth.net/**mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>>>>> Help: http://mailman.qth.net/mmfaq.**htm<http://mailman.qth.net/mmfaq.htm> >>>>>> Post: mailto: >>>>>> >>>>> >>>>> Elecraft@.qth >>>>>> >>>>> >>>>> >>>>>> This list hosted by: http://www.qsl.net >>>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> ----- >>>>> Jeff Cochrane - VK4XA >>>>> East Innisfail >>>>> Queensland >>>>> Australia >>>>> K3 #4767 >>>>> >>>>> -- >>>>> View this message in context: >>>>> >>>>> http://elecraft.365791.n2.**nabble.com/Combo-pre-amp-** >>>> tp7573740p7574221.html<http://elecraft.365791.n2.nabble.com/Combo-pre-amp-tp7573740p7574221.html> >>>> >>>>> Sent from the Elecraft mailing list archive at Nabble.com. >>>>> ______________________________**______________________________**__ >>>>> Elecraft mailing list >>>>> Home: http://mailman.qth.net/**mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>>>> Help: http://mailman.qth.net/mmfaq.**htm<http://mailman.qth.net/mmfaq.htm> >>>>> Post: mailto:[hidden email].**net <[hidden email]> >>>>> >>>>> This list hosted by: http://www.qsl.net >>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>> >>>>> ______________________________**______________________________**__ >>>>> Elecraft mailing list >>>>> Home: http://mailman.qth.net/**mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>>>> Help: http://mailman.qth.net/mmfaq.**htm<http://mailman.qth.net/mmfaq.htm> >>>>> Post: mailto:[hidden email].**net <[hidden email]> >>>>> >>>>> This list hosted by: http://www.qsl.net >>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>> >>>> >>>> -- >>>> Walter Underwood >>>> [hidden email] >>>> >>>> >>>> >>>> ______________________________**______________________________**__ >>>> Elecraft mailing list >>>> Home: http://mailman.qth.net/**mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>>> Help: http://mailman.qth.net/mmfaq.**htm<http://mailman.qth.net/mmfaq.htm> >>>> Post: mailto:[hidden email].**net <[hidden email]> >>>> >>>> This list hosted by: http://www.qsl.net >>>> Please help support this email list: http://www.qsl.net/donate.html >>>> >>>> >>> >>> >>> > > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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Ah Joe,
Thankyou for resurrecting my thought that it IS possible. The issue will most likely be a lack of quantity that would be sold versus the cost to manufacture, I will live in hope...:-) thanks for the info Joe, much appreciated. 73 Gary On 26 May 2013 12:45, Joe Subich, W4TV <[hidden email]> wrote: > > > let's not let that technical inconvenience reduce in any > > way my hope for a cure to my sometimes demented desires....:-) > > I'm not saying it isn't possible ... takes one additional relay > and two connectors. There are even couple unused control lines > on the KXV3A that could be used to control the added relay and > switch bands (10/12 and 6 M) if necessary. > > 73, > > ... Joe, W4TV > > > On 5/25/2013 10:13 PM, Gary Gregory wrote: > >> Hi Joe, >> >> Gee...Shhhhh....let's not let that technical inconvenience reduce in any >> way my hope for a cure to my sometimes demented desires....:-) >> >> Of course you are quite correct Joe. Point taken mate. >> >> 73 >> >> Gary >> >> On 26 May 2013 12:06, Joe Subich, W4TV <[hidden email]> wrote: >> >> >>> So, I will continue to want an internal pre-amp and it does not need >>> >>>> to be for 6M as I don't operate there either. This is MY choice and >>>> does not hold sway with the masses but it is my choice after all. >>>> >>>> >>> I agree that an internal preamp (or premps) would be ideal. However, >>> in addition to the preamp(s) Elecraft would need to provide *another* >>> design for the KXV3A - one that switches the RX ANT IN/OUT connections >>> to internal jacks - as neither the original KXV3 or current KXV3A have >>> that capability. >>> >>> 73, >>> >>> ... Joe, W4TV >>> >>> >>> On 5/25/2013 9:24 PM, Gary Gregory wrote: >>> >>> I don't wish to flog a dead horse any further, however, choice is >>>> something >>>> it seems everyone on this list is after. >>>> >>>> So what if a K3 needs to NOT have a 2M transverter to fit a combo >>>> pre-amp?....there are many K3's in the world not fitted with 2M. This >>>> is a >>>> choice made by the original owner I guess which is what it is, a >>>> choice. I >>>> fully appreciate everyone's point of view, but I would hazard a guess I >>>> am >>>> not alone in wanting an internal unit as a CHOICE, not at the expense of >>>> taking away other folks right to choose. >>>> >>>> Wayne has stated Elecraft's case and that is there is not enough room >>>> but >>>> his statement is qualified by the mention of the 2M option which is a >>>> customer choice right? >>>> >>>> So, I will continue to want an internal pre-amp and it does not need to >>>> be >>>> for 6M as I don't operate there either. This is MY choice and does not >>>> hold >>>> sway with the masses but it is my choice after all. >>>> >>>> You mention remote install, fine, but again it is still another cable >>>> and >>>> still yet another box to cart around. Setup on a table (standard picnic >>>> size) the depth of the table means you need to have the K-Line right on >>>> the >>>> rear edge and the 6M pre-amp protrudes far enough back that if you are >>>> up >>>> against a barrier of some sort, the cables push the K-Line forward and >>>> reduce the work space area such that little room is left to operate in a >>>> comfortable manner. >>>> >>>> I could pontificate forever on the drawbacks when operating portable >>>> but I >>>> am probably not a member of the right choir. >>>> >>>> Maybe an OEM will come up with a 'plug-in' internal 10M pre-amp designed >>>> for a K3.....now that would solve everything for me and I wouldn't have >>>> to >>>> plead my case....:-) >>>> >>>> It's all about choice folks! >>>> >>>> 73 >>>> >>>> Gary >>>> >>>> On 26 May 2013 10:32, Walter Underwood <[hidden email]> wrote: >>>> >>>> The original poster mentioned "those of us who operate portable". >>>> Running >>>> >>>>> cables to the next room does not make that any simpler. >>>>> >>>>> wunder >>>>> K6WRU >>>>> >>>>> On May 25, 2013, at 5:13 PM, Dr. William J. Schmidt, II wrote: >>>>> >>>>> This sounds like a lack of creative thinking. How about using two 90 >>>>> >>>>>> >>>>>> degree >>>>> >>>>> BNC elbows on the back of the radio and a couple of BNC jumpers. You >>>>>> can >>>>>> put the preamp anywhere... even in the next room is that is your >>>>>> fancy. >>>>>> Also, you might try one of the 50+ preamps that are already available >>>>>> by >>>>>> >>>>>> a >>>>> >>>>> variety of companies with ultra-low noise figures. I'm not sure I >>>>>> need >>>>>> a >>>>>> preamp to take up the space of my existing 2 meter module. >>>>>> >>>>>> >>>>>> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ >>>>>> >>>>>> Owner - Operator >>>>>> Big Signal Ranch >>>>>> Staunton, Illinois >>>>>> >>>>>> email: [hidden email] >>>>>> >>>>>> -----Original Message----- >>>>>> From: [hidden email].****net<elecraft-bounces@mailman.* >>>>>> *qth.net <[hidden email]>> >>>>>> [mailto:elecraft-bounces@**mai**lman.qth.net <http://mailman.qth.net> >>>>>> <elecraft-bounces@**mailman.qth.net<[hidden email]> >>>>>> >] >>>>>> On Behalf Of Jeff Cochrane >>>>>> Sent: Saturday, May 25, 2013 7:03 PM >>>>>> To: [hidden email] >>>>>> Subject: Re: [Elecraft] Combo pre-amp >>>>>> >>>>>> Agreed Gary, >>>>>> I too would be interested in an internal 10M pre-amp (or an internal >>>>>> >>>>>> combo >>>>> >>>>> 6-10M pre-amp). >>>>>> I already have the PR6 but like you say it (in stock form) protrudes >>>>>> so >>>>>> >>>>>> far >>>>> >>>>> out behind the rig that it almost impossible to use for portable work. >>>>>> Mounting it internally is the way to go and I reckon a combo pre-amp >>>>>> >>>>>> would >>>>> >>>>> sit nicely where the internal 2M transverter normally goes. >>>>>> >>>>>> Jeff Cochrane - VK4XA >>>>>> >>>>>> >>>>>> >>>>>> Gary Gregory-2 wrote >>>>>> >>>>>> Well I do hope there will be a version for 10M perhaps that will >>>>>>> install >>>>>>> within the K3. Much as it would be nice to have I am not going to buy >>>>>>> >>>>>>> more >>>>>> >>>>> >>>>> boxes needing to be plugged in, cabled or whatever. >>>>>> >>>>>>> >>>>>>> Whilst I understand some folks have space available and can wire in >>>>>>> as >>>>>>> many >>>>>>> boxes as are available, those of us who operate portable tire very >>>>>>> >>>>>>> quickly >>>>>> >>>>> >>>>> of sorting cables, boxes and the resultant tangled leads. >>>>>> >>>>>>> >>>>>>> I guess I will have to wait and see what is produced but another >>>>>>> >>>>>>> external >>>>>> >>>>> >>>>> box such as the 6M pre-amp which protrudes too far and can easily be >>>>>> >>>>>>> knocked around is a non starter for me no matter that I could use it, >>>>>>> it >>>>>>> is >>>>>>> what it is, a box too far. >>>>>>> >>>>>>> Gary >>>>>>> >>>>>>> -- >>>>>>> *Gary - VK1ZZ >>>>>>> Skype: Gary.VK1ZZ >>>>>>> Motorhome Portable >>>>>>> The Shack* >>>>>>> *Elecraft K3 >>>>>>> P3 Panadapter >>>>>>> KPA500FT >>>>>>> KAT500FT** >>>>>>> KX3-K >>>>>>> * >>>>>>> ______________________________****____________________________** >>>>>>> __**__ >>>>>>> Elecraft mailing list >>>>>>> Home: http://mailman.qth.net/****mailman/listinfo/elecraft<http://mailman.qth.net/**mailman/listinfo/elecraft> >>>>>>> <http**://mailman.qth.net/mailman/**listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>>>>>> > >>>>>>> Help: http://mailman.qth.net/mmfaq.****htm<http://mailman.qth.net/mmfaq.**htm> >>>>>>> <http://mailman.qth.net/**mmfaq.htm<http://mailman.qth.net/mmfaq.htm> >>>>>>> > >>>>>>> Post: mailto: >>>>>>> >>>>>>> >>>>>> Elecraft@.qth >>>>>> >>>>>>> >>>>>>> >>>>>> >>>>>> This list hosted by: http://www.qsl.net >>>>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>>>> >>>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> ----- >>>>>> Jeff Cochrane - VK4XA >>>>>> East Innisfail >>>>>> Queensland >>>>>> Australia >>>>>> K3 #4767 >>>>>> >>>>>> -- >>>>>> View this message in context: >>>>>> >>>>>> http://elecraft.365791.n2.**na**bble.com/Combo-pre-amp-**<http://nabble.com/Combo-pre-amp-**> >>>>>> >>>>> tp7573740p7574221.html<http://**elecraft.365791.n2.nabble.com/** >>>>> Combo-pre-amp-**tp7573740p7574221.html<http://elecraft.365791.n2.nabble.com/Combo-pre-amp-tp7573740p7574221.html> >>>>> > >>>>> >>>>> Sent from the Elecraft mailing list archive at Nabble.com. >>>>>> ______________________________****____________________________** >>>>>> __**__ >>>>>> Elecraft mailing list >>>>>> Home: http://mailman.qth.net/****mailman/listinfo/elecraft<http://mailman.qth.net/**mailman/listinfo/elecraft> >>>>>> <http**://mailman.qth.net/mailman/**listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>>>>> > >>>>>> Help: http://mailman.qth.net/mmfaq.****htm<http://mailman.qth.net/mmfaq.**htm> >>>>>> <http://mailman.qth.net/**mmfaq.htm<http://mailman.qth.net/mmfaq.htm> >>>>>> > >>>>>> Post: mailto:[hidden email].****net <[hidden email]> >>>>>> >>>>>> This list hosted by: http://www.qsl.net >>>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>>> >>>>>> ______________________________****____________________________** >>>>>> __**__ >>>>>> Elecraft mailing list >>>>>> Home: http://mailman.qth.net/****mailman/listinfo/elecraft<http://mailman.qth.net/**mailman/listinfo/elecraft> >>>>>> <http**://mailman.qth.net/mailman/**listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>>>>> > >>>>>> Help: http://mailman.qth.net/mmfaq.****htm<http://mailman.qth.net/mmfaq.**htm> >>>>>> <http://mailman.qth.net/**mmfaq.htm<http://mailman.qth.net/mmfaq.htm> >>>>>> > >>>>>> Post: mailto:[hidden email].****net <[hidden email]> >>>>>> >>>>>> This list hosted by: http://www.qsl.net >>>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>>> >>>>>> >>>>> -- >>>>> Walter Underwood >>>>> [hidden email] >>>>> >>>>> >>>>> >>>>> ______________________________****____________________________**__**__ >>>>> Elecraft mailing list >>>>> Home: http://mailman.qth.net/****mailman/listinfo/elecraft<http://mailman.qth.net/**mailman/listinfo/elecraft> >>>>> <http**://mailman.qth.net/mailman/**listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>>>> > >>>>> Help: http://mailman.qth.net/mmfaq.****htm<http://mailman.qth.net/mmfaq.**htm> >>>>> <http://mailman.qth.net/**mmfaq.htm <http://mailman.qth.net/mmfaq.htm> >>>>> > >>>>> Post: mailto:[hidden email].****net <[hidden email]> >>>>> >>>>> This list hosted by: http://www.qsl.net >>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>> >>>>> >>>>> >>>> >>>> >>>> >> >> -- *Gary - VK1ZZ Skype: Gary.VK1ZZ Motorhome Portable The Shack* *Elecraft K3 P3 Panadapter KPA500FT KAT500FT** KX3-K * ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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I don't know about that ... the incremental cost for the KXV3A vs. KXV3 was minimal. The firmware changes to support two more control lines should be minimal. As far as an internal preamp - it should not be significantly more complex than the PR6. With switching on a "KVX3B", an internal preamp would not need the bypass relays so they could be used for band switching if needed. However, if the user did not want a 10/12 preamp, it would not be a stretch to use the existing PR6 internally for six meters only. One would think it relatively straightforward to switch two input tuning/matching networks in a PR6 style preamp or an alternate, broadband design could be used to completely avoid the need for band switching. With a little care in the design and programming, a higher gain/lower nf preamp could be substituted (electronically) for the standard preamp or the controls could be arranged to cycle through "none"/"norm"/"opt". 73, ... Joe, W4TV On 5/25/2013 10:48 PM, Gary Gregory wrote: > Ah Joe, > > Thankyou for resurrecting my thought that it IS possible. The issue will > most likely be a lack of quantity that would be sold versus the cost to > manufacture, > > I will live in hope...:-) > > thanks for the info Joe, much appreciated. > > 73 > > Gary > > On 26 May 2013 12:45, Joe Subich, W4TV <[hidden email]> wrote: > >> >>> let's not let that technical inconvenience reduce in any >>> way my hope for a cure to my sometimes demented desires....:-) >> >> I'm not saying it isn't possible ... takes one additional relay >> and two connectors. There are even couple unused control lines >> on the KXV3A that could be used to control the added relay and >> switch bands (10/12 and 6 M) if necessary. >> >> 73, >> >> ... Joe, W4TV >> >> >> On 5/25/2013 10:13 PM, Gary Gregory wrote: >> >>> Hi Joe, >>> >>> Gee...Shhhhh....let's not let that technical inconvenience reduce in any >>> way my hope for a cure to my sometimes demented desires....:-) >>> >>> Of course you are quite correct Joe. Point taken mate. >>> >>> 73 >>> >>> Gary >>> >>> On 26 May 2013 12:06, Joe Subich, W4TV <[hidden email]> wrote: >>> >>> >>>> So, I will continue to want an internal pre-amp and it does not need >>>> >>>>> to be for 6M as I don't operate there either. This is MY choice and >>>>> does not hold sway with the masses but it is my choice after all. >>>>> >>>>> >>>> I agree that an internal preamp (or premps) would be ideal. However, >>>> in addition to the preamp(s) Elecraft would need to provide *another* >>>> design for the KXV3A - one that switches the RX ANT IN/OUT connections >>>> to internal jacks - as neither the original KXV3 or current KXV3A have >>>> that capability. >>>> >>>> 73, >>>> >>>> ... Joe, W4TV >>>> >>>> >>>> On 5/25/2013 9:24 PM, Gary Gregory wrote: >>>> >>>> I don't wish to flog a dead horse any further, however, choice is >>>>> something >>>>> it seems everyone on this list is after. >>>>> >>>>> So what if a K3 needs to NOT have a 2M transverter to fit a combo >>>>> pre-amp?....there are many K3's in the world not fitted with 2M. This >>>>> is a >>>>> choice made by the original owner I guess which is what it is, a >>>>> choice. I >>>>> fully appreciate everyone's point of view, but I would hazard a guess I >>>>> am >>>>> not alone in wanting an internal unit as a CHOICE, not at the expense of >>>>> taking away other folks right to choose. >>>>> >>>>> Wayne has stated Elecraft's case and that is there is not enough room >>>>> but >>>>> his statement is qualified by the mention of the 2M option which is a >>>>> customer choice right? >>>>> >>>>> So, I will continue to want an internal pre-amp and it does not need to >>>>> be >>>>> for 6M as I don't operate there either. This is MY choice and does not >>>>> hold >>>>> sway with the masses but it is my choice after all. >>>>> >>>>> You mention remote install, fine, but again it is still another cable >>>>> and >>>>> still yet another box to cart around. Setup on a table (standard picnic >>>>> size) the depth of the table means you need to have the K-Line right on >>>>> the >>>>> rear edge and the 6M pre-amp protrudes far enough back that if you are >>>>> up >>>>> against a barrier of some sort, the cables push the K-Line forward and >>>>> reduce the work space area such that little room is left to operate in a >>>>> comfortable manner. >>>>> >>>>> I could pontificate forever on the drawbacks when operating portable >>>>> but I >>>>> am probably not a member of the right choir. >>>>> >>>>> Maybe an OEM will come up with a 'plug-in' internal 10M pre-amp designed >>>>> for a K3.....now that would solve everything for me and I wouldn't have >>>>> to >>>>> plead my case....:-) >>>>> >>>>> It's all about choice folks! >>>>> >>>>> 73 >>>>> >>>>> Gary >>>>> >>>>> On 26 May 2013 10:32, Walter Underwood <[hidden email]> wrote: >>>>> >>>>> The original poster mentioned "those of us who operate portable". >>>>> Running >>>>> >>>>>> cables to the next room does not make that any simpler. >>>>>> >>>>>> wunder >>>>>> K6WRU >>>>>> >>>>>> On May 25, 2013, at 5:13 PM, Dr. William J. Schmidt, II wrote: >>>>>> >>>>>> This sounds like a lack of creative thinking. How about using two 90 >>>>>> >>>>>>> >>>>>>> degree >>>>>> >>>>>> BNC elbows on the back of the radio and a couple of BNC jumpers. You >>>>>>> can >>>>>>> put the preamp anywhere... even in the next room is that is your >>>>>>> fancy. >>>>>>> Also, you might try one of the 50+ preamps that are already available >>>>>>> by >>>>>>> >>>>>>> a >>>>>> >>>>>> variety of companies with ultra-low noise figures. I'm not sure I >>>>>>> need >>>>>>> a >>>>>>> preamp to take up the space of my existing 2 meter module. >>>>>>> >>>>>>> >>>>>>> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ >>>>>>> >>>>>>> Owner - Operator >>>>>>> Big Signal Ranch >>>>>>> Staunton, Illinois >>>>>>> >>>>>>> email: [hidden email] >>>>>>> >>>>>>> -----Original Message----- >>>>>>> From: [hidden email].****net<elecraft-bounces@mailman.* >>>>>>> *qth.net <[hidden email]>> >>>>>>> [mailto:elecraft-bounces@**mai**lman.qth.net <http://mailman.qth.net> >>>>>>> <elecraft-bounces@**mailman.qth.net<[hidden email]> >>>>>>>> ] >>>>>>> On Behalf Of Jeff Cochrane >>>>>>> Sent: Saturday, May 25, 2013 7:03 PM >>>>>>> To: [hidden email] >>>>>>> Subject: Re: [Elecraft] Combo pre-amp >>>>>>> >>>>>>> Agreed Gary, >>>>>>> I too would be interested in an internal 10M pre-amp (or an internal >>>>>>> >>>>>>> combo >>>>>> >>>>>> 6-10M pre-amp). >>>>>>> I already have the PR6 but like you say it (in stock form) protrudes >>>>>>> so >>>>>>> >>>>>>> far >>>>>> >>>>>> out behind the rig that it almost impossible to use for portable work. >>>>>>> Mounting it internally is the way to go and I reckon a combo pre-amp >>>>>>> >>>>>>> would >>>>>> >>>>>> sit nicely where the internal 2M transverter normally goes. >>>>>>> >>>>>>> Jeff Cochrane - VK4XA >>>>>>> >>>>>>> >>>>>>> >>>>>>> Gary Gregory-2 wrote >>>>>>> >>>>>>> Well I do hope there will be a version for 10M perhaps that will >>>>>>>> install >>>>>>>> within the K3. Much as it would be nice to have I am not going to buy >>>>>>>> >>>>>>>> more >>>>>>> >>>>>> >>>>>> boxes needing to be plugged in, cabled or whatever. >>>>>>> >>>>>>>> >>>>>>>> Whilst I understand some folks have space available and can wire in >>>>>>>> as >>>>>>>> many >>>>>>>> boxes as are available, those of us who operate portable tire very >>>>>>>> >>>>>>>> quickly >>>>>>> >>>>>> >>>>>> of sorting cables, boxes and the resultant tangled leads. >>>>>>> >>>>>>>> >>>>>>>> I guess I will have to wait and see what is produced but another >>>>>>>> >>>>>>>> external >>>>>>> >>>>>> >>>>>> box such as the 6M pre-amp which protrudes too far and can easily be >>>>>>> >>>>>>>> knocked around is a non starter for me no matter that I could use it, >>>>>>>> it >>>>>>>> is >>>>>>>> what it is, a box too far. >>>>>>>> >>>>>>>> Gary >>>>>>>> >>>>>>>> -- >>>>>>>> *Gary - VK1ZZ >>>>>>>> Skype: Gary.VK1ZZ >>>>>>>> Motorhome Portable >>>>>>>> The Shack* >>>>>>>> *Elecraft K3 >>>>>>>> P3 Panadapter >>>>>>>> KPA500FT >>>>>>>> KAT500FT** >>>>>>>> KX3-K >>>>>>>> * >>>>>>>> ______________________________****____________________________** >>>>>>>> __**__ >>>>>>>> Elecraft mailing list >>>>>>>> Home: http://mailman.qth.net/****mailman/listinfo/elecraft<http://mailman.qth.net/**mailman/listinfo/elecraft> >>>>>>>> <http**://mailman.qth.net/mailman/**listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>>>>>>>> >>>>>>>> Help: http://mailman.qth.net/mmfaq.****htm<http://mailman.qth.net/mmfaq.**htm> >>>>>>>> <http://mailman.qth.net/**mmfaq.htm<http://mailman.qth.net/mmfaq.htm> >>>>>>>>> >>>>>>>> Post: mailto: >>>>>>>> >>>>>>>> >>>>>>> Elecraft@.qth >>>>>>> >>>>>>>> >>>>>>>> >>>>>>> >>>>>>> This list hosted by: http://www.qsl.net >>>>>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>>>>> >>>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> ----- >>>>>>> Jeff Cochrane - VK4XA >>>>>>> East Innisfail >>>>>>> Queensland >>>>>>> Australia >>>>>>> K3 #4767 >>>>>>> >>>>>>> -- >>>>>>> View this message in context: >>>>>>> >>>>>>> http://elecraft.365791.n2.**na**bble.com/Combo-pre-amp-**<http://nabble.com/Combo-pre-amp-**> >>>>>>> >>>>>> tp7573740p7574221.html<http://**elecraft.365791.n2.nabble.com/** >>>>>> Combo-pre-amp-**tp7573740p7574221.html<http://elecraft.365791.n2.nabble.com/Combo-pre-amp-tp7573740p7574221.html> >>>>>>> >>>>>> >>>>>> Sent from the Elecraft mailing list archive at Nabble.com. >>>>>>> ______________________________****____________________________** >>>>>>> __**__ >>>>>>> Elecraft mailing list >>>>>>> Home: http://mailman.qth.net/****mailman/listinfo/elecraft<http://mailman.qth.net/**mailman/listinfo/elecraft> >>>>>>> <http**://mailman.qth.net/mailman/**listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>>>>>>> >>>>>>> Help: http://mailman.qth.net/mmfaq.****htm<http://mailman.qth.net/mmfaq.**htm> >>>>>>> <http://mailman.qth.net/**mmfaq.htm<http://mailman.qth.net/mmfaq.htm> >>>>>>>> >>>>>>> Post: mailto:[hidden email].****net <[hidden email]> >>>>>>> >>>>>>> This list hosted by: http://www.qsl.net >>>>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>>>> >>>>>>> ______________________________****____________________________** >>>>>>> __**__ >>>>>>> Elecraft mailing list >>>>>>> Home: http://mailman.qth.net/****mailman/listinfo/elecraft<http://mailman.qth.net/**mailman/listinfo/elecraft> >>>>>>> <http**://mailman.qth.net/mailman/**listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>>>>>>> >>>>>>> Help: http://mailman.qth.net/mmfaq.****htm<http://mailman.qth.net/mmfaq.**htm> >>>>>>> <http://mailman.qth.net/**mmfaq.htm<http://mailman.qth.net/mmfaq.htm> >>>>>>>> >>>>>>> Post: mailto:[hidden email].****net <[hidden email]> >>>>>>> >>>>>>> This list hosted by: http://www.qsl.net >>>>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>>>> >>>>>>> >>>>>> -- >>>>>> Walter Underwood >>>>>> [hidden email] >>>>>> >>>>>> >>>>>> >>>>>> ______________________________****____________________________**__**__ >>>>>> Elecraft mailing list >>>>>> Home: http://mailman.qth.net/****mailman/listinfo/elecraft<http://mailman.qth.net/**mailman/listinfo/elecraft> >>>>>> <http**://mailman.qth.net/mailman/**listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>>>>>> >>>>>> Help: http://mailman.qth.net/mmfaq.****htm<http://mailman.qth.net/mmfaq.**htm> >>>>>> <http://mailman.qth.net/**mmfaq.htm <http://mailman.qth.net/mmfaq.htm> >>>>>>> >>>>>> Post: mailto:[hidden email].****net <[hidden email]> >>>>>> >>>>>> This list hosted by: http://www.qsl.net >>>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> >>> >>> > > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Gary Gregory-2
I for one would remove and sell my 2m module in my K3 in order to have an
internal 6/10/12m preamp. JMHO 73, Fred/N0AZZ K3 Ser #'s 6730/5299--KX3 # 2573--K2/100--KAT100 P3/SVGA--KPA500--KAT500--W2 -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Gary Gregory Sent: Saturday, May 25, 2013 9:49 PM To: Joe Subich, W4TV Cc: elecraft List Subject: Re: [Elecraft] Combo pre-amp Ah Joe, Thankyou for resurrecting my thought that it IS possible. The issue will most likely be a lack of quantity that would be sold versus the cost to manufacture, I will live in hope...:-) thanks for the info Joe, much appreciated. 73 Gary On 26 May 2013 12:45, Joe Subich, W4TV <[hidden email]> wrote: > > > let's not let that technical inconvenience reduce in any way my hope > > for a cure to my sometimes demented desires....:-) > > I'm not saying it isn't possible ... takes one additional relay and > two connectors. There are even couple unused control lines on the > KXV3A that could be used to control the added relay and switch bands > (10/12 and 6 M) if necessary. > > 73, > > ... Joe, W4TV > > > On 5/25/2013 10:13 PM, Gary Gregory wrote: > >> Hi Joe, >> >> Gee...Shhhhh....let's not let that technical inconvenience reduce in >> any way my hope for a cure to my sometimes demented desires....:-) >> >> Of course you are quite correct Joe. Point taken mate. >> >> 73 >> >> Gary >> >> On 26 May 2013 12:06, Joe Subich, W4TV <[hidden email]> wrote: >> >> >>> So, I will continue to want an internal pre-amp and it does not >>> need >>> >>>> to be for 6M as I don't operate there either. This is MY choice and >>>> does not hold sway with the masses but it is my choice after all. >>>> >>>> >>> I agree that an internal preamp (or premps) would be ideal. >>> However, in addition to the preamp(s) Elecraft would need to provide >>> *another* design for the KXV3A - one that switches the RX ANT IN/OUT >>> connections to internal jacks - as neither the original KXV3 or >>> current KXV3A have that capability. >>> >>> 73, >>> >>> ... Joe, W4TV >>> >>> >>> On 5/25/2013 9:24 PM, Gary Gregory wrote: >>> >>> I don't wish to flog a dead horse any further, however, choice is >>>> something >>>> it seems everyone on this list is after. >>>> >>>> So what if a K3 needs to NOT have a 2M transverter to fit a combo >>>> pre-amp?....there are many K3's in the world not fitted with 2M. >>>> This is a choice made by the original owner I guess which is what >>>> it is, a choice. I fully appreciate everyone's point of view, but I >>>> would hazard a guess I am not alone in wanting an internal unit as >>>> a CHOICE, not at the expense of taking away other folks right to >>>> choose. >>>> >>>> Wayne has stated Elecraft's case and that is there is not enough >>>> room but his statement is qualified by the mention of the 2M option >>>> which is a customer choice right? >>>> >>>> So, I will continue to want an internal pre-amp and it does not >>>> need to be for 6M as I don't operate there either. This is MY >>>> choice and does not hold sway with the masses but it is my choice >>>> after all. >>>> >>>> You mention remote install, fine, but again it is still another >>>> cable and still yet another box to cart around. Setup on a table >>>> (standard picnic >>>> size) the depth of the table means you need to have the K-Line >>>> right on the rear edge and the 6M pre-amp protrudes far enough back >>>> that if you are up against a barrier of some sort, the cables push >>>> the K-Line forward and reduce the work space area such that little >>>> room is left to operate in a comfortable manner. >>>> >>>> I could pontificate forever on the drawbacks when operating >>>> portable but I am probably not a member of the right choir. >>>> >>>> Maybe an OEM will come up with a 'plug-in' internal 10M pre-amp >>>> designed for a K3.....now that would solve everything for me and I >>>> wouldn't have to plead my case....:-) >>>> >>>> It's all about choice folks! >>>> >>>> 73 >>>> >>>> Gary >>>> >>>> On 26 May 2013 10:32, Walter Underwood <[hidden email]> wrote: >>>> >>>> The original poster mentioned "those of us who operate portable". >>>> Running >>>> >>>>> cables to the next room does not make that any simpler. >>>>> >>>>> wunder >>>>> K6WRU >>>>> >>>>> On May 25, 2013, at 5:13 PM, Dr. William J. Schmidt, II wrote: >>>>> >>>>> This sounds like a lack of creative thinking. How about using >>>>> two 90 >>>>> >>>>>> >>>>>> degree >>>>> >>>>> BNC elbows on the back of the radio and a couple of BNC jumpers. >>>>> You >>>>>> can >>>>>> put the preamp anywhere... even in the next room is that is your >>>>>> fancy. >>>>>> Also, you might try one of the 50+ preamps that are already >>>>>> available by >>>>>> >>>>>> a >>>>> >>>>> variety of companies with ultra-low noise figures. I'm not sure >>>>> I >>>>>> need >>>>>> a >>>>>> preamp to take up the space of my existing 2 meter module. >>>>>> >>>>>> >>>>>> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ >>>>>> >>>>>> Owner - Operator >>>>>> Big Signal Ranch >>>>>> Staunton, Illinois >>>>>> >>>>>> email: [hidden email] >>>>>> >>>>>> -----Original Message----- >>>>>> From: >>>>>> [hidden email].****net<elecraft-bounces@mailman.* >>>>>> *qth.net <[hidden email]>> >>>>>> [mailto:elecraft-bounces@**mai**lman.qth.net >>>>>> <http://mailman.qth.net> >>>>>> <elecraft-bounces@**mailman.qth.net<[hidden email]. >>>>>> net> >>>>>> >] >>>>>> On Behalf Of Jeff Cochrane >>>>>> Sent: Saturday, May 25, 2013 7:03 PM >>>>>> To: [hidden email] >>>>>> Subject: Re: [Elecraft] Combo pre-amp >>>>>> >>>>>> Agreed Gary, >>>>>> I too would be interested in an internal 10M pre-amp (or an >>>>>> internal >>>>>> >>>>>> combo >>>>> >>>>> 6-10M pre-amp). >>>>>> I already have the PR6 but like you say it (in stock form) >>>>>> protrudes so >>>>>> >>>>>> far >>>>> >>>>> out behind the rig that it almost impossible to use for portable >>>>>> Mounting it internally is the way to go and I reckon a combo >>>>>> pre-amp >>>>>> >>>>>> would >>>>> >>>>> sit nicely where the internal 2M transverter normally goes. >>>>>> >>>>>> Jeff Cochrane - VK4XA >>>>>> >>>>>> >>>>>> >>>>>> Gary Gregory-2 wrote >>>>>> >>>>>> Well I do hope there will be a version for 10M perhaps that will >>>>>>> install >>>>>>> within the K3. Much as it would be nice to have I am not going >>>>>>> to buy >>>>>>> >>>>>>> more >>>>>> >>>>> >>>>> boxes needing to be plugged in, cabled or whatever. >>>>>> >>>>>>> >>>>>>> Whilst I understand some folks have space available and can wire >>>>>>> in as many boxes as are available, those of us who operate >>>>>>> portable tire very >>>>>>> >>>>>>> quickly >>>>>> >>>>> >>>>> of sorting cables, boxes and the resultant tangled leads. >>>>>> >>>>>>> >>>>>>> I guess I will have to wait and see what is produced but another >>>>>>> >>>>>>> external >>>>>> >>>>> >>>>> box such as the 6M pre-amp which protrudes too far and can easily >>>>> be >>>>>> >>>>>>> knocked around is a non starter for me no matter that I could >>>>>>> use it, it is what it is, a box too far. >>>>>>> >>>>>>> Gary >>>>>>> >>>>>>> -- >>>>>>> *Gary - VK1ZZ >>>>>>> Skype: Gary.VK1ZZ >>>>>>> Motorhome Portable >>>>>>> The Shack* >>>>>>> *Elecraft K3 >>>>>>> P3 Panadapter >>>>>>> KPA500FT >>>>>>> KAT500FT** >>>>>>> KX3-K >>>>>>> * >>>>>>> ______________________________****____________________________** >>>>>>> __**__ >>>>>>> Elecraft mailing list >>>>>>> Home: >>>>>>> http://mailman.qth.net/****mailman/listinfo/elecraft<http://mail >>>>>>> man.qth.net/**mailman/listinfo/elecraft> >>>>>>> <http**://mailman.qth.net/mailman/**listinfo/elecraft<http://mai >>>>>>> lman.qth.net/mailman/listinfo/elecraft> >>>>>>> > >>>>>>> Help: >>>>>>> http://mailman.qth.net/mmfaq.****htm<http://mailman.qth.net/mmfa >>>>>>> q.**htm> >>>>>>> <http://mailman.qth.net/**mmfaq.htm<http://mailman.qth.net/mmfaq >>>>>>> .htm> >>>>>>> > >>>>>>> Post: mailto: >>>>>>> >>>>>>> >>>>>> Elecraft@.qth >>>>>> >>>>>>> >>>>>>> >>>>>> >>>>>> This list hosted by: http://www.qsl.net >>>>>>> Please help support this email list: >>>>>>> http://www.qsl.net/donate.html >>>>>>> >>>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> ----- >>>>>> Jeff Cochrane - VK4XA >>>>>> East Innisfail >>>>>> Queensland >>>>>> Australia >>>>>> K3 #4767 >>>>>> >>>>>> -- >>>>>> View this message in context: >>>>>> >>>>>> >>>>>> http://elecraft.365791.n2.**na**bble.com/Combo-pre-amp-**<http:// >>>>>> nabble.com/Combo-pre-amp-**> >>>>>> >>>>> tp7573740p7574221.html<http://**elecraft.365791.n2.nabble.com/** >>>>> Combo-pre-amp-**tp7573740p7574221.html<http://elecraft.365791.n2.n >>>>> abble.com/Combo-pre-amp-tp7573740p7574221.html> >>>>> > >>>>> >>>>> Sent from the Elecraft mailing list archive at Nabble.com. >>>>>> ______________________________****____________________________** >>>>>> __**__ >>>>>> Elecraft mailing list >>>>>> Home: >>>>>> http://mailman.qth.net/****mailman/listinfo/elecraft<http://mailm >>>>>> an.qth.net/**mailman/listinfo/elecraft> >>>>>> <http**://mailman.qth.net/mailman/**listinfo/elecraft<http://mail >>>>>> man.qth.net/mailman/listinfo/elecraft> >>>>>> > >>>>>> Help: >>>>>> http://mailman.qth.net/mmfaq.****htm<http://mailman.qth.net/mmfaq >>>>>> .**htm> >>>>>> <http://mailman.qth.net/**mmfaq.htm<http://mailman.qth.net/mmfaq. >>>>>> htm> >>>>>> > >>>>>> Post: mailto:[hidden email].****net >>>>>> <[hidden email]> >>>>>> >>>>>> This list hosted by: http://www.qsl.net Please help support this >>>>>> email list: http://www.qsl.net/donate.html >>>>>> >>>>>> ______________________________****____________________________** >>>>>> __**__ >>>>>> Elecraft mailing list >>>>>> Home: >>>>>> http://mailman.qth.net/****mailman/listinfo/elecraft<http://mailm >>>>>> an.qth.net/**mailman/listinfo/elecraft> >>>>>> <http**://mailman.qth.net/mailman/**listinfo/elecraft<http://mail >>>>>> man.qth.net/mailman/listinfo/elecraft> >>>>>> > >>>>>> Help: >>>>>> http://mailman.qth.net/mmfaq.****htm<http://mailman.qth.net/mmfaq >>>>>> .**htm> >>>>>> <http://mailman.qth.net/**mmfaq.htm<http://mailman.qth.net/mmfaq. >>>>>> htm> >>>>>> > >>>>>> Post: mailto:[hidden email].****net >>>>>> <[hidden email]> >>>>>> >>>>>> This list hosted by: http://www.qsl.net Please help support this >>>>>> email list: http://www.qsl.net/donate.html >>>>>> >>>>>> >>>>> -- >>>>> Walter Underwood >>>>> [hidden email] >>>>> >>>>> >>>>> >>>>> ______________________________****____________________________**__ >>>>> **__ >>>>> Elecraft mailing list >>>>> Home: >>>>> http://mailman.qth.net/****mailman/listinfo/elecraft<http://mailma >>>>> n.qth.net/**mailman/listinfo/elecraft> >>>>> <http**://mailman.qth.net/mailman/**listinfo/elecraft<http://mailm >>>>> an.qth.net/mailman/listinfo/elecraft> >>>>> > >>>>> Help: >>>>> http://mailman.qth.net/mmfaq.****htm<http://mailman.qth.net/mmfaq. >>>>> **htm> <http://mailman.qth.net/**mmfaq.htm >>>>> <http://mailman.qth.net/mmfaq.htm> >>>>> > >>>>> Post: mailto:[hidden email].****net >>>>> <[hidden email]> >>>>> >>>>> This list hosted by: http://www.qsl.net Please help support this >>>>> email list: http://www.qsl.net/donate.html >>>>> >>>>> >>>>> >>>> >>>> >>>> >> >> -- *Gary - VK1ZZ Skype: Gary.VK1ZZ Motorhome Portable The Shack* *Elecraft K3 P3 Panadapter KPA500FT KAT500FT** KX3-K * ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.2904 / Virus Database: 3184/6355 - Release Date: 05/24/13 ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.2904 / Virus Database: 3184/6355 - Release Date: 05/24/13 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Joe Subich, W4TV-4
Joe, Gary and Joe again:
>>> >>> I agree that an internal preamp (or premps) would be ideal. However, >>> in addition to the preamp(s) Elecraft would need to provide *another* >>> design for the KXV3A - one that switches the RX ANT IN/OUT >>> connections to internal jacks - as neither the original KXV3 or >>> current KXV3A have that capability. >>> > > > let's not let that technical inconvenience reduce in any > >way my hope for a cure to my sometimes demented desires....:-) > >I'm not saying it isn't possible ... takes one additional relay and two >connectors. There are even couple unused control lines on the KXV3A >could be used to control the added relay and switch bands (10/12 and 6 M) >if necessary. > Been there, tried that. I tried two different ways to retrofit an internal preamp for 6m, and neither of them worked well enough to keep. The problem is that any modification has to work within the very tight space behind the rear panel of the KXV3 module. There is >>barely<< enough space to install a tiny PC board behind the RX ANT IN and RX ANT OUT connectors, with very tight limits on what can be included on that board. The track layouts had to be designed with a step size of 0.025in and in some places the tolerances were even tighter than that. Board #1 used a single subminiature DPDT relay and included a very simple wideband preamp; but the single relay gave insufficient isolation to prevent the preamp from oscillating out-of-band. There wasn't enough space on the board for two relays, tuned circuits or any additional shielding and decoupling; and it was impossible to make any further tweaks without completely extracting the KXV3 module. Board #2 was simpler, this time with two DPDT relays for improved port-to-port isolation, and with two coax fly-leads that were long enough to reach into the space above the KRX3 module (which Elecraft had reserved for the 144MHz transverter). That allowed me to use a fully shielded 6m preamp which gave a dramatic improvement in sensitivity - but now the VFO encoder noise made it impossible to tune the band! I believe that new problem was due to the use of two different grounding points, at the KXV3 and on the top cover of the KRX3, and I couldn't see any way around that. At that point I gave up on the idea of retrofitting an internal 6m preamp. Elecraft could have included it at the initial design stage, of course; but if my reading of history is correct, the demand for greater sensitivity on 6m came >>after<< the K3 had been launched on the market. By that time the internal hardware design was already locked down, so I can fully understand why Elecraft were obliged to produce the PR6 as an external add-on. Wayne has acknowledged that the K3 can sometimes be lacking in sensitivity on 6m, and has stated that the external PR6 module is Elecraft's solution. I wouldn't expect that position to change significantly. 73 from Ian GM3SEK ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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Hi ian,
Gee thanks for the insight to your attempts on an internal pre-amp. I imagine that the lack of sensitivity on 12/15M has appeared after production also so again the position would be the same from Elecraft. It is a pity that to correct this can only be remedied with an external device. If they ever produce a remote 10/12M preamp that could be sat a foot or so away from the K3 this would help in my case but may not suit home stations and others. I realise I am most likely in a small minority here and I accept that without reservations. I would rather pay for what I need rather than a combo including 6M which is of no use to me. 73 Gary On 26 May 2013 19:39, Ian White <[hidden email]> wrote: > Joe, Gary and Joe again: > > >>> > >>> I agree that an internal preamp (or premps) would be ideal. > However, > >>> in addition to the preamp(s) Elecraft would need to provide > *another* > >>> design for the KXV3A - one that switches the RX ANT IN/OUT > >>> connections to internal jacks - as neither the original KXV3 or > >>> current KXV3A have that capability. > >>> > > > > > let's not let that technical inconvenience reduce in any > > >way my hope for a cure to my sometimes demented desires....:-) > > > >I'm not saying it isn't possible ... takes one additional relay and two > >connectors. There are even couple unused control lines on the KXV3A > that > >could be used to control the added relay and switch bands (10/12 and 6 > M) > >if necessary. > > > > Been there, tried that. I tried two different ways to retrofit an > internal preamp for 6m, and neither of them worked well enough to keep. > > The problem is that any modification has to work within the very tight > space behind the rear panel of the KXV3 module. There is >>barely<< > enough space to install a tiny PC board behind the RX ANT IN and RX ANT > OUT connectors, with very tight limits on what can be included on that > board. The track layouts had to be designed with a step size of 0.025in > and in some places the tolerances were even tighter than that. > > Board #1 used a single subminiature DPDT relay and included a very > simple wideband preamp; but the single relay gave insufficient isolation > to prevent the preamp from oscillating out-of-band. There wasn't enough > space on the board for two relays, tuned circuits or any additional > shielding and decoupling; and it was impossible to make any further > tweaks without completely extracting the KXV3 module. Board #2 was > simpler, this time with two DPDT relays for improved port-to-port > isolation, and with two coax fly-leads that were long enough to reach > into the space above the KRX3 module (which Elecraft had reserved for > the 144MHz transverter). That allowed me to use a fully shielded 6m > preamp which gave a dramatic improvement in sensitivity - but now the > VFO encoder noise made it impossible to tune the band! I believe that > new problem was due to the use of two different grounding points, at the > KXV3 and on the top cover of the KRX3, and I couldn't see any way around > that. > > At that point I gave up on the idea of retrofitting an internal 6m > preamp. Elecraft could have included it at the initial design stage, of > course; but if my reading of history is correct, the demand for greater > sensitivity on 6m came >>after<< the K3 had been launched on the market. > By that time the internal hardware design was already locked down, so I > can fully understand why Elecraft were obliged to produce the PR6 as an > external add-on. > > Wayne has acknowledged that the K3 can sometimes be lacking in > sensitivity on 6m, and has stated that the external PR6 module is > Elecraft's solution. I wouldn't expect that position to change > significantly. > > > 73 from Ian GM3SEK > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- *Gary - VK1ZZ Skype: Gary.VK1ZZ Motorhome Portable The Shack* *Elecraft K3 P3 Panadapter KPA500FT KAT500FT** KX3-K * ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Joe Subich, W4TV-4
I hope Eric and Wayne are reading this one, Joe!
73, Greg-N4CC ----- Original Message ----- From: "Joe Subich, W4TV" <[hidden email]> To: "Gary Gregory" <[hidden email]> Cc: "elecraft List" <[hidden email]> Sent: Saturday, May 25, 2013 11:04 PM Subject: Re: [Elecraft] Combo pre-amp > > I don't know about that ... the incremental cost for the KXV3A > vs. KXV3 was minimal. The firmware changes to support two more > control lines should be minimal. > > As far as an internal preamp - it should not be significantly more > complex than the PR6. With switching on a "KVX3B", an internal > preamp would not need the bypass relays so they could be used for > band switching if needed. However, if the user did not want a > 10/12 preamp, it would not be a stretch to use the existing PR6 > internally for six meters only. > > One would think it relatively straightforward to switch two input > tuning/matching networks in a PR6 style preamp or an alternate, > broadband design could be used to completely avoid the need for > band switching. With a little care in the design and programming, > a higher gain/lower nf preamp could be substituted (electronically) > for the standard preamp or the controls could be arranged to cycle > through "none"/"norm"/"opt". > > 73, > > ... Joe, W4TV > > > On 5/25/2013 10:48 PM, Gary Gregory wrote: >> Ah Joe, >> >> Thankyou for resurrecting my thought that it IS possible. The issue will >> most likely be a lack of quantity that would be sold versus the cost to >> manufacture, >> >> I will live in hope...:-) >> >> thanks for the info Joe, much appreciated. >> >> 73 >> >> Gary >> >> On 26 May 2013 12:45, Joe Subich, W4TV <[hidden email]> wrote: >> >>> >>>> let's not let that technical inconvenience reduce in any >>>> way my hope for a cure to my sometimes demented desires....:-) >>> >>> I'm not saying it isn't possible ... takes one additional relay >>> and two connectors. There are even couple unused control lines >>> on the KXV3A that could be used to control the added relay and >>> switch bands (10/12 and 6 M) if necessary. >>> >>> 73, >>> >>> ... Joe, W4TV >>> >>> >>> On 5/25/2013 10:13 PM, Gary Gregory wrote: >>> >>>> Hi Joe, >>>> >>>> Gee...Shhhhh....let's not let that technical inconvenience reduce in >>>> any >>>> way my hope for a cure to my sometimes demented desires....:-) >>>> >>>> Of course you are quite correct Joe. Point taken mate. >>>> >>>> 73 >>>> >>>> Gary >>>> >>>> On 26 May 2013 12:06, Joe Subich, W4TV <[hidden email]> wrote: >>>> >>>> >>>>> So, I will continue to want an internal pre-amp and it does not >>>>> need >>>>> >>>>>> to be for 6M as I don't operate there either. This is MY choice and >>>>>> does not hold sway with the masses but it is my choice after all. >>>>>> >>>>>> >>>>> I agree that an internal preamp (or premps) would be ideal. However, >>>>> in addition to the preamp(s) Elecraft would need to provide *another* >>>>> design for the KXV3A - one that switches the RX ANT IN/OUT connections >>>>> to internal jacks - as neither the original KXV3 or current KXV3A have >>>>> that capability. >>>>> >>>>> 73, >>>>> >>>>> ... Joe, W4TV >>>>> >>>>> >>>>> On 5/25/2013 9:24 PM, Gary Gregory wrote: >>>>> >>>>> I don't wish to flog a dead horse any further, however, choice is >>>>>> something >>>>>> it seems everyone on this list is after. >>>>>> >>>>>> So what if a K3 needs to NOT have a 2M transverter to fit a combo >>>>>> pre-amp?....there are many K3's in the world not fitted with 2M. This >>>>>> is a >>>>>> choice made by the original owner I guess which is what it is, a >>>>>> choice. I >>>>>> fully appreciate everyone's point of view, but I would hazard a guess >>>>>> I >>>>>> am >>>>>> not alone in wanting an internal unit as a CHOICE, not at the expense >>>>>> of >>>>>> taking away other folks right to choose. >>>>>> >>>>>> Wayne has stated Elecraft's case and that is there is not enough room >>>>>> but >>>>>> his statement is qualified by the mention of the 2M option which is a >>>>>> customer choice right? >>>>>> >>>>>> So, I will continue to want an internal pre-amp and it does not need >>>>>> to >>>>>> be >>>>>> for 6M as I don't operate there either. This is MY choice and does >>>>>> not >>>>>> hold >>>>>> sway with the masses but it is my choice after all. >>>>>> >>>>>> You mention remote install, fine, but again it is still another cable >>>>>> and >>>>>> still yet another box to cart around. Setup on a table (standard >>>>>> picnic >>>>>> size) the depth of the table means you need to have the K-Line right >>>>>> on >>>>>> the >>>>>> rear edge and the 6M pre-amp protrudes far enough back that if you >>>>>> are >>>>>> up >>>>>> against a barrier of some sort, the cables push the K-Line forward >>>>>> and >>>>>> reduce the work space area such that little room is left to operate >>>>>> in a >>>>>> comfortable manner. >>>>>> >>>>>> I could pontificate forever on the drawbacks when operating portable >>>>>> but I >>>>>> am probably not a member of the right choir. >>>>>> >>>>>> Maybe an OEM will come up with a 'plug-in' internal 10M pre-amp >>>>>> designed >>>>>> for a K3.....now that would solve everything for me and I wouldn't >>>>>> have >>>>>> to >>>>>> plead my case....:-) >>>>>> >>>>>> It's all about choice folks! >>>>>> >>>>>> 73 >>>>>> >>>>>> Gary >>>>>> >>>>>> On 26 May 2013 10:32, Walter Underwood <[hidden email]> wrote: >>>>>> >>>>>> The original poster mentioned "those of us who operate portable". >>>>>> Running >>>>>> >>>>>>> cables to the next room does not make that any simpler. >>>>>>> >>>>>>> wunder >>>>>>> K6WRU >>>>>>> >>>>>>> On May 25, 2013, at 5:13 PM, Dr. William J. Schmidt, II wrote: >>>>>>> >>>>>>> This sounds like a lack of creative thinking. How about using >>>>>>> two 90 >>>>>>> >>>>>>>> >>>>>>>> degree >>>>>>> >>>>>>> BNC elbows on the back of the radio and a couple of BNC jumpers. >>>>>>> You >>>>>>>> can >>>>>>>> put the preamp anywhere... even in the next room is that is your >>>>>>>> fancy. >>>>>>>> Also, you might try one of the 50+ preamps that are already >>>>>>>> available >>>>>>>> by >>>>>>>> >>>>>>>> a >>>>>>> >>>>>>> variety of companies with ultra-low noise figures. I'm not sure I >>>>>>>> need >>>>>>>> a >>>>>>>> preamp to take up the space of my existing 2 meter module. >>>>>>>> >>>>>>>> >>>>>>>> Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ >>>>>>>> >>>>>>>> Owner - Operator >>>>>>>> Big Signal Ranch >>>>>>>> Staunton, Illinois >>>>>>>> >>>>>>>> email: [hidden email] >>>>>>>> >>>>>>>> -----Original Message----- >>>>>>>> From: >>>>>>>> [hidden email].****net<elecraft-bounces@mailman.* >>>>>>>> *qth.net <[hidden email]>> >>>>>>>> [mailto:elecraft-bounces@**mai**lman.qth.net >>>>>>>> <http://mailman.qth.net> >>>>>>>> <elecraft-bounces@**mailman.qth.net<[hidden email]> >>>>>>>>> ] >>>>>>>> On Behalf Of Jeff Cochrane >>>>>>>> Sent: Saturday, May 25, 2013 7:03 PM >>>>>>>> To: [hidden email] >>>>>>>> Subject: Re: [Elecraft] Combo pre-amp >>>>>>>> >>>>>>>> Agreed Gary, >>>>>>>> I too would be interested in an internal 10M pre-amp (or an >>>>>>>> internal >>>>>>>> >>>>>>>> combo >>>>>>> >>>>>>> 6-10M pre-amp). >>>>>>>> I already have the PR6 but like you say it (in stock form) >>>>>>>> protrudes >>>>>>>> so >>>>>>>> >>>>>>>> far >>>>>>> >>>>>>> out behind the rig that it almost impossible to use for portable >>>>>>> work. >>>>>>>> Mounting it internally is the way to go and I reckon a combo >>>>>>>> pre-amp >>>>>>>> >>>>>>>> would >>>>>>> >>>>>>> sit nicely where the internal 2M transverter normally goes. >>>>>>>> >>>>>>>> Jeff Cochrane - VK4XA >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> Gary Gregory-2 wrote >>>>>>>> >>>>>>>> Well I do hope there will be a version for 10M perhaps that will >>>>>>>>> install >>>>>>>>> within the K3. Much as it would be nice to have I am not going to >>>>>>>>> buy >>>>>>>>> >>>>>>>>> more >>>>>>>> >>>>>>> >>>>>>> boxes needing to be plugged in, cabled or whatever. >>>>>>>> >>>>>>>>> >>>>>>>>> Whilst I understand some folks have space available and can wire >>>>>>>>> in >>>>>>>>> as >>>>>>>>> many >>>>>>>>> boxes as are available, those of us who operate portable tire very >>>>>>>>> >>>>>>>>> quickly >>>>>>>> >>>>>>> >>>>>>> of sorting cables, boxes and the resultant tangled leads. >>>>>>>> >>>>>>>>> >>>>>>>>> I guess I will have to wait and see what is produced but another >>>>>>>>> >>>>>>>>> external >>>>>>>> >>>>>>> >>>>>>> box such as the 6M pre-amp which protrudes too far and can easily >>>>>>> be >>>>>>>> >>>>>>>>> knocked around is a non starter for me no matter that I could use >>>>>>>>> it, >>>>>>>>> it >>>>>>>>> is >>>>>>>>> what it is, a box too far. >>>>>>>>> >>>>>>>>> Gary >>>>>>>>> >>>>>>>>> -- >>>>>>>>> *Gary - VK1ZZ >>>>>>>>> Skype: Gary.VK1ZZ >>>>>>>>> Motorhome Portable >>>>>>>>> The Shack* >>>>>>>>> *Elecraft K3 >>>>>>>>> P3 Panadapter >>>>>>>>> KPA500FT >>>>>>>>> KAT500FT** >>>>>>>>> KX3-K >>>>>>>>> * >>>>>>>>> ______________________________****____________________________** >>>>>>>>> __**__ >>>>>>>>> Elecraft mailing list >>>>>>>>> Home: >>>>>>>>> http://mailman.qth.net/****mailman/listinfo/elecraft<http://mailman.qth.net/**mailman/listinfo/elecraft> >>>>>>>>> <http**://mailman.qth.net/mailman/**listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>>>>>>>>> >>>>>>>>> Help: >>>>>>>>> http://mailman.qth.net/mmfaq.****htm<http://mailman.qth.net/mmfaq.**htm> >>>>>>>>> <http://mailman.qth.net/**mmfaq.htm<http://mailman.qth.net/mmfaq.htm> >>>>>>>>>> >>>>>>>>> Post: mailto: >>>>>>>>> >>>>>>>>> >>>>>>>> Elecraft@.qth >>>>>>>> >>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>>>> This list hosted by: http://www.qsl.net >>>>>>>>> Please help support this email list: >>>>>>>>> http://www.qsl.net/donate.html >>>>>>>>> >>>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> ----- >>>>>>>> Jeff Cochrane - VK4XA >>>>>>>> East Innisfail >>>>>>>> Queensland >>>>>>>> Australia >>>>>>>> K3 #4767 >>>>>>>> >>>>>>>> -- >>>>>>>> View this message in context: >>>>>>>> >>>>>>>> >>>>>>>> http://elecraft.365791.n2.**na**bble.com/Combo-pre-amp-**<http://nabble.com/Combo-pre-amp-**> >>>>>>>> >>>>>>> tp7573740p7574221.html<http://**elecraft.365791.n2.nabble.com/** >>>>>>> Combo-pre-amp-**tp7573740p7574221.html<http://elecraft.365791.n2.nabble.com/Combo-pre-amp-tp7573740p7574221.html> >>>>>>>> >>>>>>> >>>>>>> Sent from the Elecraft mailing list archive at Nabble.com. >>>>>>>> ______________________________****____________________________** >>>>>>>> __**__ >>>>>>>> Elecraft mailing list >>>>>>>> Home: >>>>>>>> http://mailman.qth.net/****mailman/listinfo/elecraft<http://mailman.qth.net/**mailman/listinfo/elecraft> >>>>>>>> <http**://mailman.qth.net/mailman/**listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>>>>>>>> >>>>>>>> Help: >>>>>>>> http://mailman.qth.net/mmfaq.****htm<http://mailman.qth.net/mmfaq.**htm> >>>>>>>> <http://mailman.qth.net/**mmfaq.htm<http://mailman.qth.net/mmfaq.htm> >>>>>>>>> >>>>>>>> Post: mailto:[hidden email].****net >>>>>>>> <[hidden email]> >>>>>>>> >>>>>>>> This list hosted by: http://www.qsl.net >>>>>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>>>>> >>>>>>>> ______________________________****____________________________** >>>>>>>> __**__ >>>>>>>> Elecraft mailing list >>>>>>>> Home: >>>>>>>> http://mailman.qth.net/****mailman/listinfo/elecraft<http://mailman.qth.net/**mailman/listinfo/elecraft> >>>>>>>> <http**://mailman.qth.net/mailman/**listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>>>>>>>> >>>>>>>> Help: >>>>>>>> http://mailman.qth.net/mmfaq.****htm<http://mailman.qth.net/mmfaq.**htm> >>>>>>>> <http://mailman.qth.net/**mmfaq.htm<http://mailman.qth.net/mmfaq.htm> >>>>>>>>> >>>>>>>> Post: mailto:[hidden email].****net >>>>>>>> <[hidden email]> >>>>>>>> >>>>>>>> This list hosted by: http://www.qsl.net >>>>>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>>>>> >>>>>>>> >>>>>>> -- >>>>>>> Walter Underwood >>>>>>> [hidden email] >>>>>>> >>>>>>> >>>>>>> >>>>>>> ______________________________****____________________________**__**__ >>>>>>> Elecraft mailing list >>>>>>> Home: >>>>>>> http://mailman.qth.net/****mailman/listinfo/elecraft<http://mailman.qth.net/**mailman/listinfo/elecraft> >>>>>>> <http**://mailman.qth.net/mailman/**listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> >>>>>>>> >>>>>>> Help: >>>>>>> http://mailman.qth.net/mmfaq.****htm<http://mailman.qth.net/mmfaq.**htm> >>>>>>> <http://mailman.qth.net/**mmfaq.htm >>>>>>> <http://mailman.qth.net/mmfaq.htm> >>>>>>>> >>>>>>> Post: mailto:[hidden email].****net <[hidden email]> >>>>>>> >>>>>>> This list hosted by: http://www.qsl.net >>>>>>> Please help support this email list: http://www.qsl.net/donate.html >>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>>> >>>>>> >>>> >>>> >> >> > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Gary Gregory-2
I have a new design Norton preamplifier that might be useful for this
purpose. It has 11 dB gain through 30 MHz and 9 dB at 54 MHz, noise figure is in the 2.5-3 dB range, OIP2 > +85 dBm, OIP3 > +42 dBm. The OIP values are conservative numbers. When power is switched off, the preamp is bypassed. Housed in a custom built, powder coated, silk screened enclosure. Power requirements, 13.6V @ 100 mA. Model no. Z10043S. Anyone interested in one can contact me off-list for a data sheet, pricing and delivery schedule. This preamp is not shown at my web site - too new to have a page yet. Jack K8ZOA On 5/26/2013 6:21 AM, Gary Gregory wrote: > Hi ian, > > Gee thanks for the insight to your attempts on an internal pre-amp. > > I imagine that the lack of sensitivity on 12/15M has appeared after > production also so again the position would be the same from Elecraft. > > It is a pity that to correct this can only be remedied with an external > device. If they ever produce a remote 10/12M preamp that could be sat a > foot or so away from the K3 this would help in my case but may not suit > home stations and others. I realise I am most likely in a small minority > here and I accept that without reservations. > > I would rather pay for what I need rather than a combo including 6M which > is of no use to me. > > 73 > > Gary > > On 26 May 2013 19:39, Ian White <[hidden email]> wrote: > >> Joe, Gary and Joe again: >> >>>>> I agree that an internal preamp (or premps) would be ideal. >> However, >>>>> in addition to the preamp(s) Elecraft would need to provide >> *another* >>>>> design for the KXV3A - one that switches the RX ANT IN/OUT >>>>> connections to internal jacks - as neither the original KXV3 or >>>>> current KXV3A have that capability. >>>>> >>>> let's not let that technical inconvenience reduce in any >>>> way my hope for a cure to my sometimes demented desires....:-) >>> I'm not saying it isn't possible ... takes one additional relay and two >>> connectors. There are even couple unused control lines on the KXV3A >> that >>> could be used to control the added relay and switch bands (10/12 and 6 >> M) >>> if necessary. >>> >> Been there, tried that. I tried two different ways to retrofit an >> internal preamp for 6m, and neither of them worked well enough to keep. >> >> The problem is that any modification has to work within the very tight >> space behind the rear panel of the KXV3 module. There is >>barely<< >> enough space to install a tiny PC board behind the RX ANT IN and RX ANT >> OUT connectors, with very tight limits on what can be included on that >> board. The track layouts had to be designed with a step size of 0.025in >> and in some places the tolerances were even tighter than that. >> >> Board #1 used a single subminiature DPDT relay and included a very >> simple wideband preamp; but the single relay gave insufficient isolation >> to prevent the preamp from oscillating out-of-band. There wasn't enough >> space on the board for two relays, tuned circuits or any additional >> shielding and decoupling; and it was impossible to make any further >> tweaks without completely extracting the KXV3 module. Board #2 was >> simpler, this time with two DPDT relays for improved port-to-port >> isolation, and with two coax fly-leads that were long enough to reach >> into the space above the KRX3 module (which Elecraft had reserved for >> the 144MHz transverter). That allowed me to use a fully shielded 6m >> preamp which gave a dramatic improvement in sensitivity - but now the >> VFO encoder noise made it impossible to tune the band! I believe that >> new problem was due to the use of two different grounding points, at the >> KXV3 and on the top cover of the KRX3, and I couldn't see any way around >> that. >> >> At that point I gave up on the idea of retrofitting an internal 6m >> preamp. Elecraft could have included it at the initial design stage, of >> course; but if my reading of history is correct, the demand for greater >> sensitivity on 6m came >>after<< the K3 had been launched on the market. >> By that time the internal hardware design was already locked down, so I >> can fully understand why Elecraft were obliged to produce the PR6 as an >> external add-on. >> >> Wayne has acknowledged that the K3 can sometimes be lacking in >> sensitivity on 6m, and has stated that the external PR6 module is >> Elecraft's solution. I wouldn't expect that position to change >> significantly. >> >> >> 73 from Ian GM3SEK >> >> >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by gm3sek
Ian, On 5/26/2013 5:39 AM, Ian White wrote: > The problem is that any modification has to work within the very tight > space behind the rear panel of the KXV3 module. There is >>barely<< > enough space to install a tiny PC board behind the RX ANT IN and RX ANT > OUT connectors, with very tight limits on what can be included on that > board. The track layouts had to be designed with a step size of 0.025in > and in some places the tolerances were even tighter than that. I'm talking about a solution that would switch the RX IN/OUT connection from the rear panel to board connections on the "KXV3B" much the same as is done for XVTR IN/OUT in the KXV3A. That means one is not dealing with the narrow space between the KXV3 and KXV3 connector board and all returns would come from the KV3B board. > Wayne has acknowledged that the K3 can sometimes be lacking in > sensitivity on 6m, and has stated that the external PR6 module is > Elecraft's solution. I wouldn't expect that position to change > significantly. The external module is a workable solution for a single band and I understand the difficulty in changing out the broadband bipolar preamp or adding an alternate preamp in the current signal flow but this would be a reasonable alternative for those who do not want/need the internal transverter. BTW, I looked at your web site and don't find any information on calculating NF from MDS ... just curious. 73, ... Joe, W4TV ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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W4TV wrote:
>I'm talking about a solution that would switch the RX IN/OUT connection >from the rear panel to board connections on the "KXV3B" much the same as >is done for XVTR IN/OUT in the KXV3A. That means one is not dealing with >the narrow space between the KXV3 and KXV3 connector board and all >returns would come from the KV3B board. > I do see what you mean, Joe, but it was beyond the level of modification that I was prepared to attempt. > >BTW, I looked at your web site and don't find any information on calculating >NF from MDS ... just curious. > You're right, it's all in 'The VHF/UHF DX Book' which is out of print, but you can find some of the same material in the Agilent Technologies Application Note AN57-2. Here's a brief summary. Noise floor aka MDS is a power level in units of watts. Noise Figure is based on the more fundamental concept of noise temperature (see AN57-2). Noise temperature is measured in units of kelvin (K) and is calculated from MDS by : T = (MDS, W) / (1.38 x 10^-23 x (bandwidth, Hz)) The more common engineering quantity is noise figure (NF) which has units of dB and is derived from T by a standard definition: NF = 10 log10 (T/290 + 1) For the K3, the specified MDS at 50MHz (internal preamp on) is -136 to -138dBm in 500Hz bandwidth. If you follow the example calculation, you will find that -138dBm corresponds to a noise temperature of 2297K and a noise figure of 9.5dB. 73 from Ian GM3SEK ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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