Phase noise
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Hello again Elecrafters!
Yes Fraser i saw Your comment but not the comments of others.We are still in very low number. Seams that only Europians have the problems with "little" birdies and noises. And between Europians S5 is a little country with a lot of ham-radio activity HI. In what kind of place do we live is Bob asking? In a place of 300*300 km (186*186 miles if You are more familiar with that). And during VHF ctests there are at least 10 stations with full legal limit power and "average" distance between them is abt 35 miles (worst case 23 miles) what in terms of path loss is "only" -110dB in free space on 144MHz (there is a line of sight between us !!!). Now all of us use "Javornik" 144/14Mhz transverters designed by S53WW and the situation is not so bad as before with all sorts of stuff.The only important thing now is to have bullet-proof HF RX (K2 shurely is) and a clean HF TX. I will enjoy in comments.And i understand that is difficult to deal with the problem if you live in MBA (Mighty Big America). S55M-Adi P.S. I was trying to send this several times to the list. Hope that it will get trough now. _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Hello everyone!
>From one debate we went to two different ones. While on the beginning we were talking about K2's TX noise and birdies on SSB now we are talking on another subject which is interference of magnetic fields on K2's behavior. Let's see the noise and birdies problem first. I found the surce of birdies is the clock signal (maybe the 4Mhz osc itself also contributes to this) on KSB2 wich goes from pin 14 on U1 to pin 2 of U2.This signal is interfering directly to Q2 and some birdies are well heard on the band HI. So what i tried to do is simply to shield a bit the path betwen the U1+U2 to Q2. The result is that the strongest bird (Fc 14.250MHz Fbirdie14.148MHz went down by 10dB (and i suppose all the others went down for the same ammount) Maybe 10dB seams little but for me evry dB is important. Picture of my KSB2 can be found at http://www.s55m.com/teh/images/ksb2.jpg Test eq: K2 itself TX output at transverter port (jumper W6) at +6dBm (for birdies without modulated signal but checked also with SSB modulation wich do not affect birdies as far away HI) RX TS930S on CW 500Hz filter AGC OFF NF Siemens U2032 Gerauschspannungmesser (psophometer) BW 300-3400 Hz range -70 to +40dB 73's S55M-Adi ----- Original Message ----- From: "S55M" <[hidden email]> To: "Elecraft" <[hidden email]> Sent: Saturday, March 19, 2005 2:46 PM Subject: [Elecraft] Phase noise Hello again Elecrafters! Yes Fraser i saw Your comment but not the comments of others.We are still in very low number. Seams that only Europians have the problems with "little" birdies and noises. And between Europians S5 is a little country with a lot of ham-radio activity HI. In what kind of place do we live is Bob asking? In a place of 300*300 km (186*186 miles if You are more familiar with that). And during VHF ctests there are at least 10 stations with full legal limit power and "average" distance between them is abt 35 miles (worst case 23 miles) what in terms of path loss is "only" -110dB in free space on 144MHz (there is a line of sight between us !!!). Now all of us use "Javornik" 144/14Mhz transverters designed by S53WW and the situation is not so bad as before with all sorts of stuff.The only important thing now is to have bullet-proof HF RX (K2 shurely is) and a clean HF TX. I will enjoy in comments.And i understand that is difficult to deal with the problem if you live in MBA (Mighty Big America). S55M-Adi P.S. I was trying to send this several times to the list. Hope that it will get trough now. _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by S55M
Eureka!
There is a voice over the ocean HI! That's the pure truth what You are saying. We are bothering normal majority of HAM's with some ("marginal" HI) things wich are of interest of minority of geeks :) . I am also using DB6NT transverters for 6 but centimeters and for 3 centimeters also HI. The new series of Michael transverters is really bullet proof but also not so much cost effective :( .(IC7800 price is almost all my annual income :( ) I am really happy with "Javornik" 14/144MHz using +23dBm mixer and has 2 converters wich are identical in preformance so You can use both recievers in some HF radios at once. Here is the polite question to Wayne and Eric and others from Elecraft to maybe open another forum with pure technical stuff because deletting all the messages wich are not of my interests is very time consuming for me and i am shure my writing for the others is also. Hope the voice will be suported and heard :) . CU! S55M-Adi ----- Original Message ----- From: "Dick Hanson" <[hidden email]> To: "'S55M'" <[hidden email]> Sent: Sunday, March 20, 2005 4:03 PM Subject: RE: [Elecraft] Phase noise > Hi Adi.... > I've been reading the thread(s) on the above as well as 2nd crystal filter, > and magnetic shielding. > You and your European friends are exactly correct that most of the stuff on > the Elecraft site is not really technical nor about specs etc. Most of the > folks are simply thrilled to be building a kit, so they naturally get all > caught up in which solder station to use, which aftermarket knob to use or > that their radio "has just taken its first breath"!! > I guess this sort of stuff is OK for most on the normal reflector, > particularly if it serves to get people excited again about our hobby, but > I, like you and a few others, would rather exchange information about how > the radio can be made better in handling big signals etc. > > I am also very active on six and two meters and have both the six and two > meter Elecraft units to go with my K2. The performance of this combo is > good, but not the equal of my DL6NT transverter in combo with my IC7800. > > Except for vhf contest stations that are close to NYV or Boston, most US > hams have no idea what STRONG sigs in Europe are like. And we don't have > contend with the really big signals from your TV stations like those around > 48.242, 48.249, 48.260 etc. > > Anyhow, I hope you all are successful in coming up with another reflector > for technical discussions on the K2. Please let me know, as I would like to > subscribe. > > 73 > Dick, K5AND > Six meter expeditions: XR0X, 9G5AN, J79AND, VP2MJD, VP5H, KP2/K5AND, > J8/N4HSM, VP2E/K5AND, P40H, FG/N4HSM, V31RH, ZF2GF, V47SIX, 6Y5/N4HSM, > V2/N4HSM > > > _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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I think it would be a mistake to pull out an Elecraft technical forum. I'm
involved with intranet design (not the technical side, the conceptual side). Many corporate customers want to include forums for their group to discuss common interests and problems. Very briefly, the more compartmentalized they become, the less successful the forums. The pressure initially is for more specialized forums. The trend is towards fewer or one "general" forum with a broader focus. Here's why. A successful forum is a community. It isn't just the occasional interesting topics and posts that hold the group together. It is also the "chatter". Far from being off-topic, most chatter serves to bind the group into a community. There are lulls between really interesting completely on-topic posts, and the chatter keeps the community together so that it is there for the next "new thing". It's the same in other facets of our lives. We don't just talk about religion at church functions. We don't just talk about ham radio at club meetings. What a boring world if every group limited their discussions in that way. Sure, you have to keep things mostly on topic, but you have to let things stray a little (this group is very even-handedly moderated) Something as specialized as a pure technical forum on Elecraft equipment is going to attract a relative few. My guess is it wouldn't even attract many of those on here who are very technically competent. It will not attract the great majority of Elecraft owners who want to know how their rig works, but mainly just want to enjoy their radios. There will be the occasional "hot" technical topic (e.g. phase noise), but chances are good there will be relatively long periods of time when nothing is happening and members will drift on to other interests. The few remaining will not be involved in heated technical discussions because it will be the same small group that already knows what the others are interested in. I say keep it together. Sometimes I have an interest in what the geeks are saying. I understand the highlights and maybe learn something I can use. Some I delete when I see the call sign. I learn most from guys like Don (W3FPR) and Ron (AC7AC) and many others in their offers of troubleshooting help. Not that I have always experienced the problem or expect to, but by getting insights into how the rig works when it is working like it was designed. I learn from just about everyone. I also learned that there is a delete button. With only a couple of dozen posts a day, it is not much of a burden. Eric KE6US ----- Original Message ----- Here is the polite question to Wayne and Eric and others from Elecraft to maybe open another forum with pure technical stuff because deletting all the messages wich are not of my interests is very time consuming for me and i am shure my writing for the others is also. Hope the voice will be suported and heard :) . CU! S55M-Adi ----- Original Message ----- > You and your European friends are exactly correct that most of the stuff on > the Elecraft site is not really technical nor about specs etc. ... > I, like you and a few others, would rather exchange information about how > the radio can be made better in handling big signals etc. > > > Anyhow, I hope you all are successful in coming up with another reflector > for technical discussions on the K2. Please let me know, as I would like To subscribe. _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Re: Separate Groups Would be a Mistake
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For what its worth, I'm with Eric on this one.
(Disclaimer: I have no financial interest in Elecraft, and do not currently even own any Elecraft products. However, I am presently in the process of putting together the capability (i.e., acquiring test equipment and tools, setting up an undisturbed construction space, et cetera) to build a K2.) I do think that the emergence of Elecraft is a significant development in the ham community, essentially putting the "amateur" back into amateur radio. This list is a community exploring the not-always-separable nuances of participation in the Elecraft tribe, as well as other "beyond appliance operating" aspects of ham radio. I often gain insights (as I'm sure others do) from the juxtaposition of seemingly irrelevant and disconnected posts. That synergy would be destroyed by some arbitrary fractioning of the list into disjoint parts. 73, Steve Kercel AA4AK At 09:36 AM 3/20/2005 -0800, you wrote: > I think it would be a mistake to pull out an Elecraft technical forum. I'm >involved with intranet design (not the technical side, the conceptual side). >Many corporate customers want to include forums for their group to discuss >common interests and problems. Very briefly, the more compartmentalized they >become, the less successful the forums. The pressure initially is for more >specialized forums. The trend is towards fewer or one "general" forum with a >broader focus. > >Here's why. A successful forum is a community. It isn't just the occasional >interesting topics and posts that hold the group together. It is also the >"chatter". Far from being off-topic, most chatter serves to bind the group >into a community. There are lulls between really interesting completely >on-topic posts, and the chatter keeps the community together so that it is >there for the next "new thing". > >It's the same in other facets of our lives. We don't just talk about >religion at church functions. We don't just talk about ham radio at club >meetings. What a boring world if every group limited their discussions in >that way. Sure, you have to keep things mostly on topic, but you have to let >things stray a little (this group is very even-handedly moderated) > >Something as specialized as a pure technical forum on Elecraft equipment is >going to attract a relative few. My guess is it wouldn't even attract many >of those on here who are very technically competent. It will not attract the >great majority of Elecraft owners who want to know how their rig works, but >mainly just want to enjoy their radios. There will be the occasional "hot" >technical topic (e.g. phase noise), but chances are good there will be >relatively long periods of time when nothing is happening and members will >drift on to other interests. The few remaining will not be involved in >heated technical discussions because it will be the same small group that >already knows what the others are interested in. > >I say keep it together. Sometimes I have an interest in what the geeks are >saying. I understand the highlights and maybe learn something I can use. >Some I delete when I see the call sign. I learn most from guys like Don >(W3FPR) and Ron (AC7AC) and many others in their offers of troubleshooting >help. Not that I have always experienced the problem or expect to, but by >getting insights into how the rig works when it is working like it was >designed. I learn from just about everyone. > >I also learned that there is a delete button. With only a couple of dozen >posts a day, it is not much of a burden. > >Eric >KE6US > >----- Original Message ----- >Here is the polite question to Wayne and Eric and others from Elecraft to >maybe open another forum with pure technical stuff because deletting all the >messages wich are not of my interests is very time consuming for me and i am >shure my writing for the others is also. >Hope the voice will be suported and heard :) . > >CU! > >S55M-Adi > >----- Original Message ----- > > You and your European friends are exactly correct that most of the stuff >on > > the Elecraft site is not really technical nor about specs etc. ... > > I, like you and a few others, would rather exchange information about how > > the radio can be made better in handling big signals etc. > > > > > > > Anyhow, I hope you all are successful in coming up with another reflector > > for technical discussions on the K2. Please let me know, as I would like >To subscribe. >_______________________________________________ >Elecraft mailing list >Post to: [hidden email] >You must be a subscriber to post to the list. >Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > >Help: http://mailman.qth.net/subscribers.htm >Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
RE: Separate Groups Would be a Mistake
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In reply to this post by EricJ-2
Eric, I was hoping someone would say this. You certainly brought out some
great points. I, too, hope they keep it together. Michael N4NMR > -----Original Message----- > From: [hidden email] > [mailto:[hidden email]] On Behalf Of EricJ > Sent: Sunday, March 20, 2005 12:36 PM > To: [hidden email] > Subject: [Elecraft] Separate Groups Would be a Mistake > > I think it would be a mistake to pull out an Elecraft > technical forum. I'm involved with intranet design (not the > technical side, the conceptual side). > Many corporate customers want to include forums for their > group to discuss common interests and problems. Very briefly, > the more compartmentalized they become, the less successful > the forums. The pressure initially is for more specialized > forums. The trend is towards fewer or one "general" forum > with a broader focus. > > Here's why. A successful forum is a community. It isn't just > the occasional interesting topics and posts that hold the > group together. It is also the "chatter". Far from being > off-topic, most chatter serves to bind the group into a > community. There are lulls between really interesting > completely on-topic posts, and the chatter keeps the > community together so that it is there for the next "new thing". > > It's the same in other facets of our lives. We don't just > talk about religion at church functions. We don't just talk > about ham radio at club meetings. What a boring world if > every group limited their discussions in that way. Sure, you > have to keep things mostly on topic, but you have to let > things stray a little (this group is very even-handedly moderated) > > Something as specialized as a pure technical forum on > Elecraft equipment is going to attract a relative few. My > guess is it wouldn't even attract many of those on here who > are very technically competent. It will not attract the great > majority of Elecraft owners who want to know how their rig > works, but mainly just want to enjoy their radios. There will > be the occasional "hot" > technical topic (e.g. phase noise), but chances are good > there will be relatively long periods of time when nothing is > happening and members will drift on to other interests. The > few remaining will not be involved in heated technical > discussions because it will be the same small group that > already knows what the others are interested in. > > I say keep it together. Sometimes I have an interest in what > the geeks are saying. I understand the highlights and maybe > learn something I can use. > Some I delete when I see the call sign. I learn most from > guys like Don > (W3FPR) and Ron (AC7AC) and many others in their offers of > troubleshooting help. Not that I have always experienced the > problem or expect to, but by getting insights into how the > rig works when it is working like it was designed. I learn > from just about everyone. > > I also learned that there is a delete button. With only a > couple of dozen posts a day, it is not much of a burden. > > Eric > KE6US > > ----- Original Message ----- > Here is the polite question to Wayne and Eric and others from > Elecraft to maybe open another forum with pure technical > stuff because deletting all the messages wich are not of my > interests is very time consuming for me and i am shure my > writing for the others is also. > Hope the voice will be suported and heard :) . > > CU! > > S55M-Adi > > ----- Original Message ----- > > You and your European friends are exactly correct that most of the > > stuff > on > > the Elecraft site is not really technical nor about specs etc. ... > > I, like you and a few others, would rather exchange > information about > > how the radio can be made better in handling big signals etc. > > > > > > > Anyhow, I hope you all are successful in coming up with another > > reflector for technical discussions on the K2. Please let > me know, as > > I would like > To subscribe. > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by S55M
Adi,
It looks like you have a small piece of copper and two grounds, one taken from the far side of the processor and the other from somewhere behind that electrolytic capacitor. Could you let us know if that is correct and which tie points you used? Also, did you insulate the copper on the bottom or are you depending on wire stiffness to keep it from touching? 73, Leigh / WA5ZNU On Sat, 19 Mar 2005 4:12 pm, S55M wrote: > Hello everyone! > >> From one debate we went to two different ones. > While on the beginning we were talking about K2's TX noise and birdies > on > SSB now we are talking on another subject which is interference of > magnetic > fields on K2's behavior. > Let's see the noise and birdies problem first. > I found the surce of birdies is the clock signal (maybe the 4Mhz osc > itself > also contributes to this) on KSB2 wich goes from pin 14 on U1 to pin 2 > of > U2.This signal is interfering directly to Q2 and some birdies are well > heard > on the band HI. > So what i tried to do is simply to shield a bit the path betwen the > U1+U2 to > Q2. The result is that the strongest bird (Fc 14.250MHz > Fbirdie14.148MHz > went down by 10dB (and i suppose all the others went down for the same > ammount) Maybe 10dB seams little but for me evry dB is important. > Picture of my KSB2 can be found at > http://www.s55m.com/teh/images/ksb2.jpg > Test eq: > > K2 itself TX output at transverter port (jumper W6) at +6dBm (for > birdies > without modulated signal but checked also with SSB modulation wich do > not > affect birdies as far away HI) > RX TS930S on CW 500Hz filter AGC OFF > NF Siemens U2032 Gerauschspannungmesser (psophometer) BW 300-3400 Hz > range -70 to +40dB > > 73's > S55M-Adi > > ----- Original Message ----- > From: "S55M" <[hidden email]> > To: "Elecraft" <[hidden email]> > Sent: Saturday, March 19, 2005 2:46 PM > Subject: [Elecraft] Phase noise > > > Hello again Elecrafters! > > Yes Fraser i saw Your comment but not the comments of others.We are > still in > very low number. > Seams that only Europians have the problems with "little" birdies and > noises. > And between Europians S5 is a little country with a lot of ham-radio > activity HI. > In what kind of place do we live is Bob asking? > In a place of 300*300 km (186*186 miles if You are more familiar with > that). > And during VHF ctests there are at least 10 stations with full legal > limit > power and "average" distance between them is abt 35 miles (worst case > 23 > miles) what in terms of path loss is "only" -110dB in free space on > 144MHz > (there is a line of sight between us !!!). > Now all of us use "Javornik" 144/14Mhz transverters designed by S53WW > and > the situation is not so bad as before with all sorts of stuff.The only > important thing now is to have bullet-proof HF RX (K2 shurely is) and a > clean HF TX. > I will enjoy in comments.And i understand that is difficult to deal > with > the problem if you live in MBA (Mighty Big America). > > > S55M-Adi > > > P.S. > I was trying to send this several times to the list. Hope that it will > get > trough now. > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Separate Groups: maybe someday, but not yet...
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In reply to this post by Stephen W. Kercel
Thanks for the interesting discussion, everyone. This issue has come up
before, and we've concluded that creating separate lists might drain energy from what is at present a lively and diverse forum. We've achieved the critical mass needed to sustain community, and we'd hate to lose it. Of course if participation suddenly jumped by a factor of five, we might have to do some partitioning. All of the arguments made so far (e.g., per-rig lists) would be taken into consideration at that point. Meanwhile, those who want to screen what they read can select one of the alternatives to getting every posting as e-mail. You can get a daily digest, or read selected postings via the web. We do have one separate list called "Elecraft-Announce" that you can find on www.qth.net, right next to our regular list. We post new-product announcements, firmware upgrades, builder alerts, etc. on this list, as well as on the regular list. (I think we could be a little more diligent about it, and I'll remind our staff about this.) So, if you wanted to keep up with what's new without participating in the "big" discussion, you could subscribe only to Elecraft-Announce. I suppose we could create a recursive list exclusively for the discussion of how many lists to create ;) 73, Wayne N6KR _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Leigh L. Klotz Jr WA5ZNU
Hello Leigh!
It's easyer with top posting HI! This is not a must mod but i need every dB vhen I am QRO with transverter on 144Mhz at +60dBm and stations 20 miles around me. Yes You see a peace of bended cooper of 0.5mm placed over the half U1 and entire U2 on KSB2. There are three supports. I steal the one end support on pin 4 of U2 wich is on GND.The cooper foil is cutted and bonded a bit to touch only pin 4 of U2 and not touch the other pins of U2. Then for support on the other side i drilled 1mm hole between U1 and C38 right in front of C38 to reach the ground on the other side of PCB (pay attention on traces on the other side of PCB).I inserted the wire in the hole and soldered it on the ground side (you must scratch a bit the green stuff to get to the gnd foil). Than i found some gnd on bottom side at the edge of PCB (near U1) ,scratched-solderd the wire, and bended the wire all over to reach the cooper shield on the top. It sits very well and is not isolated at the bottom (gap from pcb of 1mm).The solderd supports are keeping it in place without damage.Preform at your own risk. I am very bad in English writing :( so look well at the picture HI. I think that K2 would be much better with a bit of internal shielding between digital and analog parts and maybe with metal (not alluminium) covers. Every PIC is possible source of birdies. K2 is a little compressed box with lot's of fun packed in.And lot's of reserve! S55M-Adi ----- Original Message ----- From: "Leigh L Klotz, Jr." <[hidden email]> To: "S55M" <[hidden email]>; "Elecraft" <[hidden email]> Sent: Sunday, March 20, 2005 7:46 PM Subject: Re: [Elecraft] Phase noise > Adi, > It looks like you have a small piece of copper and two grounds, one > taken from the far side of the processor and the other from somewhere > behind that electrolytic capacitor. Could you let us know if that is > correct and which tie points you used? Also, did you insulate the > copper on the bottom or are you depending on wire stiffness to keep it > from touching? > 73, > Leigh / WA5ZNU > > On Sat, 19 Mar 2005 4:12 pm, S55M wrote: > > Hello everyone! > > > >> From one debate we went to two different ones. > > While on the beginning we were talking about K2's TX noise and birdies > > on > > SSB now we are talking on another subject which is interference of > > magnetic > > fields on K2's behavior. > > Let's see the noise and birdies problem first. > > I found the surce of birdies is the clock signal (maybe the 4Mhz osc > > itself > > also contributes to this) on KSB2 wich goes from pin 14 on U1 to pin 2 > > of > > U2.This signal is interfering directly to Q2 and some birdies are well > > heard > > on the band HI. > > So what i tried to do is simply to shield a bit the path betwen the > > U1+U2 to > > Q2. The result is that the strongest bird (Fc 14.250MHz > > Fbirdie14.148MHz > > went down by 10dB (and i suppose all the others went down for the same > > ammount) Maybe 10dB seams little but for me evry dB is important. > > Picture of my KSB2 can be found at > > http://www.s55m.com/teh/images/ksb2.jpg > > Test eq: > > > > K2 itself TX output at transverter port (jumper W6) at +6dBm (for > > birdies > > without modulated signal but checked also with SSB modulation wich do > > not > > affect birdies as far away HI) > > RX TS930S on CW 500Hz filter AGC OFF > > NF Siemens U2032 Gerauschspannungmesser (psophometer) BW 300-3400 Hz > > range -70 to +40dB > > > > 73's > > S55M-Adi > > > > ----- Original Message ----- > > From: "S55M" <[hidden email]> > > To: "Elecraft" <[hidden email]> > > Sent: Saturday, March 19, 2005 2:46 PM > > Subject: [Elecraft] Phase noise > > > > > > Hello again Elecrafters! > > > > Yes Fraser i saw Your comment but not the comments of others.We are > > still in > > very low number. > > Seams that only Europians have the problems with "little" birdies and > > noises. > > And between Europians S5 is a little country with a lot of ham-radio > > activity HI. > > In what kind of place do we live is Bob asking? > > In a place of 300*300 km (186*186 miles if You are more familiar with > > that). > > And during VHF ctests there are at least 10 stations with full legal > > limit > > power and "average" distance between them is abt 35 miles (worst case > > 23 > > miles) what in terms of path loss is "only" -110dB in free space on > > 144MHz > > (there is a line of sight between us !!!). > > Now all of us use "Javornik" 144/14Mhz transverters designed by S53WW > > and > > the situation is not so bad as before with all sorts of stuff.The only > > important thing now is to have bullet-proof HF RX (K2 shurely is) and a > > clean HF TX. > > I will enjoy in comments.And i understand that is difficult to deal > > with > > the problem if you live in MBA (Mighty Big America). > > > > > > S55M-Adi > > > > > > P.S. > > I was trying to send this several times to the list. Hope that it will > > get > > trough now. > > _______________________________________________ > > Elecraft mailing list > > Post to: [hidden email] > > You must be a subscriber to post to the list. > > Subscriber Info (Addr. Change, sub, unsub etc.): > > http://mailman.qth.net/mailman/listinfo/elecraft > > > > Help: http://mailman.qth.net/subscribers.htm > > Elecraft web page: http://www.elecraft.com > > > > _______________________________________________ > > Elecraft mailing list > > Post to: [hidden email] > > You must be a subscriber to post to the list. > > Subscriber Info (Addr. Change, sub, unsub etc.): > > http://mailman.qth.net/mailman/listinfo/elecraft > > > > Help: http://mailman.qth.net/subscribers.htm > > Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by wayne burdick
I am not always visible on the list, but I read almost every email
so that I won't miss out on some valuable technical issue that concerns my Elecraft equipment. The noise doesn't bother me...my keyboard still has a delete key. There are discussions that come by that I am not particularly interested in, or they are over my head. I am still interested in the outcome of most of these things, in case they do affect the operability or performance of my K-whatever rig. I can always opt to not make the mod, which is what most of the discussions seem to be about...mods to improve the performance. I think if other lists were created, I would probably subscribe to them as well. So what has been accomplished is that I have to make more folders to sort the stuff? Crazy idea as far as I am concerned. Stan Rife W5EWA Houston, TX K2 S/N 4216 -----Original Message----- From: wayne burdick Subject: [Elecraft] Separate Groups: maybe someday, but not yet... Thanks for the interesting discussion, everyone. This issue has come up before, and we've concluded that creating separate lists might drain energy from what is at present a lively and diverse forum. We've achieved the critical mass needed to sustain community, and we'd hate to lose it. Of course if participation suddenly jumped by a factor of five, we might have to do some partitioning. All of the arguments made so far (e.g., per-rig lists) would be taken into consideration at that point. Meanwhile, those who want to screen what they read can select one of the alternatives to getting every posting as e-mail. You can get a daily digest, or read selected postings via the web. We do have one separate list called "Elecraft-Announce" that you can find on www.qth.net, right next to our regular list. We post new-product announcements, firmware upgrades, builder alerts, etc. on this list, as well as on the regular list. (I think we could be a little more diligent about it, and I'll remind our staff about this.) So, if you wanted to keep up with what's new without participating in the "big" discussion, you could subscribe only to Elecraft-Announce. I suppose we could create a recursive list exclusively for the discussion of how many lists to create ;) 73, Wayne N6KR _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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