KPA500 Coax size requirements
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While it’s important to use quality components with high power for safety, its also important to use quality components especially to minimize losses with low power. Just sayin’
Chuck Jack Hawley KE9UW Sent from my iPhone, cjack > On Aug 20, 2019, at 11:51 PM, Jack Brindle via Elecraft <[hidden email]> wrote: > > Carter; > > Welcome to the world of higher power. The information you have received from others is very good. There is one other thing to watch for, it is something that most hams who upgrade to higher power experience. When we operate at low power, there are a lot of things we can get away with such as relatively poor connectors, cheap coax and the like. When we add power, things change, and many of these things start having problems. Things like arcing across connectors (watch the elbows), whether at the antenna or along the path, heating of components (low-power baluns are especially bad), and many other things can give you fits. These will be noticed as faults, either in the ATU or the KPA, and make you wonder what is going on. > > The answer is to use good quality components in your antenna path from the ATU all the way to, and including the antenna. That will make the system, including the KAT and the KPA much happier, and with it, your use of it. > > As for the KPA500, it can indeed run at 120V quite well. Both of mine (which includes the first prototype) have run that way for many years. Both the KPA and the KAT monitor their environment extensively, and will report issues if they see any problems with the antenna system, usually in the form of high reflected power. Many hams use the units daily. We believe you will enjoy them as well! > > If you have any questions, just ask! > > 73, > Jack Brindle, W6FB > Elecraft Engineering > >> On Aug 20, 2019, at 12:11 PM, Carter Craigie <[hidden email]> wrote: >> >> Hello friends, >> >> I am contemplating buying a KPA500 amplifier/tuner Combo, and driving it >> from my Elecraft K2/100 rig. I hope I would be able to do that! >> >> From what I have read on eHam Reviews, it appears that I can run the >> amp/tuner combo on 117v. from the convenient wall socket. Is that correct, >> as well? >> >> I cannot find any mention of the coax requirements, from the radio/combo >> out to our 80-meter wire loop antenna. Right now, using only my K2/100 I am >> able to use 8X coax. >> >> Will I still be able to use that coax cable with up to 500 Watts output? >> >> What other considerations do I need to make? >> >> Thanks in advance, >> >> Carter Craigie, N3AO >> Blacksburg, VA >> >> >> -- >> Carter, N3AO >> Blacksburg, VA >> ______________________________________________________________ >> 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 >> Message delivered to [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 > Message delivered to [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 Message delivered to [hidden email]
Chuck, KE9UW
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Good point, Chuck,
I understand and concur completely. 73, Carter, N3AO Blacksburg, VA On Wed, Aug 21, 2019 at 8:55 AM hawley, charles j jr <[hidden email]> wrote: > While it’s important to use quality components with high power for safety, > its also important to use quality components especially to minimize losses > with low power. Just sayin’ > > Chuck Jack Hawley > KE9UW > > Sent from my iPhone, cjack > > > On Aug 20, 2019, at 11:51 PM, Jack Brindle via Elecraft < > [hidden email]> wrote: > > > > Carter; > > > > Welcome to the world of higher power. The information you have received > from others is very good. There is one other thing to watch for, it is > something that most hams who upgrade to higher power experience. When we > operate at low power, there are a lot of things we can get away with such > as relatively poor connectors, cheap coax and the like. When we add power, > things change, and many of these things start having problems. Things like > arcing across connectors (watch the elbows), whether at the antenna or > along the path, heating of components (low-power baluns are especially > bad), and many other things can give you fits. These will be noticed as > faults, either in the ATU or the KPA, and make you wonder what is going on. > > > > The answer is to use good quality components in your antenna path from > the ATU all the way to, and including the antenna. That will make the > system, including the KAT and the KPA much happier, and with it, your use > of it. > > > > As for the KPA500, it can indeed run at 120V quite well. Both of mine > (which includes the first prototype) have run that way for many years. Both > the KPA and the KAT monitor their environment extensively, and will report > issues if they see any problems with the antenna system, usually in the > form of high reflected power. Many hams use the units daily. We believe you > will enjoy them as well! > > > > If you have any questions, just ask! > > > > 73, > > Jack Brindle, W6FB > > Elecraft Engineering > > > >> On Aug 20, 2019, at 12:11 PM, Carter Craigie <[hidden email]> > wrote: > >> > >> Hello friends, > >> > >> I am contemplating buying a KPA500 amplifier/tuner Combo, and driving it > >> from my Elecraft K2/100 rig. I hope I would be able to do that! > >> > >> From what I have read on eHam Reviews, it appears that I can run the > >> amp/tuner combo on 117v. from the convenient wall socket. Is that > correct, > >> as well? > >> > >> I cannot find any mention of the coax requirements, from the radio/combo > >> out to our 80-meter wire loop antenna. Right now, using only my K2/100 > I am > >> able to use 8X coax. > >> > >> Will I still be able to use that coax cable with up to 500 Watts output? > >> > >> What other considerations do I need to make? > >> > >> Thanks in advance, > >> > >> Carter Craigie, N3AO > >> Blacksburg, VA > >> > >> > >> -- > >> Carter, N3AO > >> Blacksburg, VA > >> ______________________________________________________________ > >> 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 > >> Message delivered to [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 > > Message delivered to [hidden email] > Carter, N3AO Blacksburg, VA ______________________________________________________________ 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 Message delivered to [hidden email] |
Re: KPA500 Coax size requirements
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Administrator
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[End of Thread]
Looks like Carter has gotten a wealth of good info on coax type vs power and feedline loss. :-) Let's let the thread end for now in the interest of relieving list email overload for other readers. In general, please take discussions off list or end them when more than 5-10 posts have been made. This one had 22.. [The list moderator is not able to read the list in real time, so do not rely on them to shut down all over enthusiastic threads. If threads are getting out of control, please feel free to email me directly. ] 73, Eric /moderator etc./ /elecraft.com/ On 8/21/2019 6:17 AM, Carter Craigie wrote: > Good point, Chuck, > I understand and concur completely. > 73, > Carter, N3AO > Blacksburg, VA > ______________________________________________________________ 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 Message delivered to [hidden email] |
Re: KPA500 Coax size requirements
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In reply to this post by ke9uw
On 8/21/2019 5:55 AM, hawley, charles j jr wrote:
> While it’s important to use quality components with high power for safety, its also important to use quality components especially to minimize losses with low power. Yep. Our QRP operation for FD uses big coax. 73, Jim K9YC ______________________________________________________________ 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 Message delivered to [hidden email] |
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In reply to this post by Bob McGraw - K4TAX
The current version of the KAT500 manual is Rev C6 (3/8/17) and directs users
to connect the power cable to "the station 11 to 15 VDC power supply". This is another reason why we should use the most current manuals and update them with firmware changes. Elecraft is one of the few in this business who allow adding notes to their PDF manuals. Thank-you Elecraft! BTW, more often than not what you read at e-ham is not correct. It's often someone's opinion which is not based on science or fact. I would never trust anything there without confirming the assertion with several other sources. Also, when others pile on with "Yes, that's correct." I will still seek other sources. 98% of the time, you'll find the correct information in this group. Thank-you group! 73, Bill, K8TE -- Sent from: http://elecraft.365791.n2.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 Message delivered to [hidden email] |
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But it’s on the INTERNET!....
Sent from my iPhone ...nr4c. bill > On Aug 22, 2019, at 8:14 AM, K8TE <[hidden email]> wrote: > > The current version of the KAT500 manual is Rev C6 (3/8/17) and directs users > to connect the power cable to "the station 11 to 15 VDC power supply". This > is another reason why we should use the most current manuals and update them > with firmware changes. Elecraft is one of the few in this business who > allow adding notes to their PDF manuals. Thank-you Elecraft! > > BTW, more often than not what you read at e-ham is not correct. It's often > someone's opinion which is not based on science or fact. I would never > trust anything there without confirming the assertion with several other > sources. Also, when others pile on with "Yes, that's correct." I will still > seek other sources. 98% of the time, you'll find the correct information in > this group. Thank-you group! > > 73, Bill, K8TE > > > > -- > Sent from: http://elecraft.365791.n2.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 > Message delivered to [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 Message delivered to [hidden email] |
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Yes, I've found it there Bill, but not when I'm in the boonies with no cell
reception. I always have one, usually more, computers with me. 73, Bill Mader, K8TE W6H NM Coordinator, Route 66 On-the-Air 7-15 Sep 2019 Duke City Hamfest BoD www.dukecityhamfest.org 20-22 Sep 2019 President, Albuquerque DX Association On Thu, Aug 22, 2019 at 8:46 AM Nr4c <[hidden email]> wrote: > But it’s on the INTERNET!.... > > Sent from my iPhone > ...nr4c. bill > > > > On Aug 22, 2019, at 8:14 AM, K8TE <[hidden email]> wrote: > > > > The current version of the KAT500 manual is Rev C6 (3/8/17) and directs > users > > to connect the power cable to "the station 11 to 15 VDC power supply". > This > > is another reason why we should use the most current manuals and update > them > > with firmware changes. Elecraft is one of the few in this business who > > allow adding notes to their PDF manuals. Thank-you Elecraft! > > > > BTW, more often than not what you read at e-ham is not correct. It's > often > > someone's opinion which is not based on science or fact. I would never > > trust anything there without confirming the assertion with several other > > sources. Also, when others pile on with "Yes, that's correct." I will > still > > seek other sources. 98% of the time, you'll find the correct > information in > > this group. Thank-you group! > > > > 73, Bill, K8TE > > > > > > > > -- > > Sent from: http://elecraft.365791.n2.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 > > Message delivered to [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 Message delivered to [hidden email] |
Re: KPA500 Coax size requirements
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Yes and the most issues I encounter in assisting other hams is that they
DO NOT read the manuals. They take the approach "aw heck, I know how that works". Well that is just downright wrong. Look at the questions asked and issues presented and just how many of those are or can be answered by inducing the idea of RTFM. Just because the firmware was updated and it is no longer required to have a correct power up sequence as stated in the outdated manual, I don't view this certainly doesn't make it wrong operationally. The later firmware just provided an option on power up sequence. While on my soapbox, don't you just love it when someone asked a question or poses a problem, a solution is given, and they are never heard from again? No thanks, no sharing the solution with others. All take and no give. Seemingly the nature of society in general today. It is really rather pathetic. 73 Bob, K4TAX On 8/22/2019 9:53 AM, Bill Mader wrote: > Yes, I've found it there Bill, but not when I'm in the boonies with no cell > reception. I always have one, usually more, computers with me. > > 73, Bill Mader, K8TE > W6H NM Coordinator, Route 66 On-the-Air 7-15 Sep 2019 > Duke City Hamfest BoD www.dukecityhamfest.org 20-22 Sep 2019 > President, Albuquerque DX Association > > > > On Thu, Aug 22, 2019 at 8:46 AM Nr4c <[hidden email]> wrote: > >> But it’s on the INTERNET!.... >> >> Sent from my iPhone >> ...nr4c. bill >> >> >>> On Aug 22, 2019, at 8:14 AM, K8TE <[hidden email]> wrote: >>> >>> The current version of the KAT500 manual is Rev C6 (3/8/17) and directs >> users >>> to connect the power cable to "the station 11 to 15 VDC power supply". >> This >>> is another reason why we should use the most current manuals and update >> them >>> with firmware changes. Elecraft is one of the few in this business who >>> allow adding notes to their PDF manuals. Thank-you Elecraft! >>> >>> BTW, more often than not what you read at e-ham is not correct. It's >> often >>> someone's opinion which is not based on science or fact. I would never >>> trust anything there without confirming the assertion with several other >>> sources. Also, when others pile on with "Yes, that's correct." I will >> still >>> seek other sources. 98% of the time, you'll find the correct >> information in >>> this group. Thank-you group! >>> >>> 73, Bill, K8TE >>> >>> >>> >>> -- >>> Sent from: http://elecraft.365791.n2.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 >>> Message delivered to [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 > Message delivered to [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 Message delivered to [hidden email] |
Re: KPA500 Coax size requirements
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Administrator
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Folks - This topic was closed yesterday.
73, Eric mooderator /elecraft.com/ On 8/22/2019 8:49 AM, Bob McGraw K4TAX wrote: > Yes and the most issues I encounter in assisting other hams is that they DO > NOT read the manuals. They take the approach "aw heck, I know how that > works". Well that is just downright wrong. Look at the questions asked and > issues presented and just how many of those are or can be answered by inducing > the idea of RTFM. > > Just because the firmware was updated and it is no longer required to have a > correct power up sequence as stated in the outdated manual, I don't view this > certainly doesn't make it wrong operationally. The later firmware just > provided an option on power up sequence. > > While on my soapbox, don't you just love it when someone asked a question or > poses a problem, a solution is given, and they are never heard from again? No > thanks, no sharing the solution with others. All take and no give. > Seemingly the nature of society in general today. > > It is really rather pathetic. > > 73 > > Bob, K4TAX > > > On 8/22/2019 9:53 AM, Bill Mader wrote: >> Yes, I've found it there Bill, but not when I'm in the boonies with no cell >> reception. I always have one, usually more, computers with me. >> >> 73, Bill Mader, K8TE >> W6H NM Coordinator, Route 66 On-the-Air 7-15 Sep 2019 >> Duke City Hamfest BoD www.dukecityhamfest.org 20-22 Sep 2019 >> President, Albuquerque DX Association >> >> >> >> On Thu, Aug 22, 2019 at 8:46 AM Nr4c <[hidden email]> wrote: >> >>> But it’s on the INTERNET!.... >>> >>> Sent from my iPhone >>> ...nr4c. bill >>> >>> >>>> On Aug 22, 2019, at 8:14 AM, K8TE <[hidden email]> wrote: >>>> >>>> The current version of the KAT500 manual is Rev C6 (3/8/17) and directs >>> users >>>> to connect the power cable to "the station 11 to 15 VDC power supply". >>> This >>>> is another reason why we should use the most current manuals and update >>> them >>>> with firmware changes. Elecraft is one of the few in this business who >>>> allow adding notes to their PDF manuals. Thank-you Elecraft! >>>> >>>> BTW, more often than not what you read at e-ham is not correct. It's >>> often >>>> someone's opinion which is not based on science or fact. I would never >>>> trust anything there without confirming the assertion with several other >>>> sources. Also, when others pile on with "Yes, that's correct." I will >>> still >>>> seek other sources. 98% of the time, you'll find the correct >>> information in >>>> this group. Thank-you group! >>>> >>>> 73, Bill, K8TE >>>> >>>> >>>> >>>> -- >>>> Sent from: http://elecraft.365791.n2.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 >>>> Message delivered to [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 >> Message delivered to [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 > Message delivered to [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 Message delivered to [hidden email] |
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