Re: [Elecraft] P3 TX Monitor Question
In the TX Monitor Menu, check that "Mod En" is enabled. Alan N1AL On 2020-04-10 21:48, Tom and Karen Norris wrote: > I've been almost 2 years getting to this point of assembling the P3 Kit. > The K3s I got to right away. Now that I have the P3 together and working > the only problem I have is I cannot get the CW Split signal to show on the > P3 display. I've gone through the Fred Cady (what a life saver! We will > miss him and his way of saying things that even I can understand!) K3s/P3 > manual and duplicated his TXMonMenu settings, the PEP and SWR meters work > (Fred said they may not match the K3s meters and they don't) but the CW > Transmit signal does not appear on the display at all, either with Split > enabled or disabled. Is there another setting someplace that I'm missing or > a setting that I have wrong? Any help would be greatly appreciated! > Tom NB5Q > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to a...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX3 WSJTX Split
I also tried the 3 sec KHz lock procedure on both vfo's however that did not prevent the sync either. -Original Message- From: Adrian [mailto:vk4...@gmail.com] Sent: Saturday, 11 April 2020 1:29 PM To: 'Bob McGraw K4TAX' Cc: 'elecraft@mailman.qth.net' Subject: RE: [Elecraft] KX3 WSJTX Split Bob, I still seem to have the same issue with your suggestion, when first TX terminates the frequencies sync.See ; https://youtu.be/PMO_IlYsoe0 Thankyou Adrian , vk4tux -Original Message- From: Bob McGraw K4TAX [mailto:rmcg...@blomand.net] Sent: Saturday, 11 April 2020 10:19 AM To: Adrian Subject: Re: [Elecraft] KX3 WSJTX Split Adrian: The way and reason this works, if you have the WSJT-X Split Mode set to RADIO via F2 Setup menu, then the software commands the radio to go into the split mode. The split mode in this sense is to keep the audio transmitted tone above 1500 Hz and moves VFO B in order to do so. This is not the traditional thinking and operation where one uses split when working a DX pileup. If you have the Split Mode set to NONE in the WSJT-X software, then there is no split command sent to the radio. Thus you can manually select SPLIT via the radio and this allows you to receive the frequency of choice on VFO A and then you can transmit on the frequency of choice on VFO B. Sorry I didn't make this clear originally. 73 Bob, K4TAX On 4/10/2020 5:32 PM, Adrian wrote: > Thanks Bob, I will try that out. > > > regards > > > Adrian , vk4tux > > On 11/4/20 8:08 am, Bob McGraw K4TAX wrote: >> In the F2 Setup Menu for WSJT-X change the SPLIT Function to NONE. >> Then set the Radio for SPLIT mode. That way you can manually adjust >> VFO A for RX and then set VFO B for the TX frequency.Just keep >> the audio tone above 1200 Hz for TX. >> >> Resolves the problem >> >> 73 >> >> Bob, K4TAX >> >> > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] P3 TX Monitor Question
I've been almost 2 years getting to this point of assembling the P3 Kit. The K3s I got to right away. Now that I have the P3 together and working the only problem I have is I cannot get the CW Split signal to show on the P3 display. I've gone through the Fred Cady (what a life saver! We will miss him and his way of saying things that even I can understand!) K3s/P3 manual and duplicated his TXMonMenu settings, the PEP and SWR meters work (Fred said they may not match the K3s meters and they don't) but the CW Transmit signal does not appear on the display at all, either with Split enabled or disabled. Is there another setting someplace that I'm missing or a setting that I have wrong? Any help would be greatly appreciated! Tom NB5Q __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX3 WSJTX Split
Bob, I still seem to have the same issue with your suggestion, when first TX terminates the frequencies sync.See ; https://youtu.be/PMO_IlYsoe0 Thankyou Adrian , vk4tux -Original Message- From: Bob McGraw K4TAX [mailto:rmcg...@blomand.net] Sent: Saturday, 11 April 2020 10:19 AM To: Adrian Subject: Re: [Elecraft] KX3 WSJTX Split Adrian: The way and reason this works, if you have the WSJT-X Split Mode set to RADIO via F2 Setup menu, then the software commands the radio to go into the split mode. The split mode in this sense is to keep the audio transmitted tone above 1500 Hz and moves VFO B in order to do so. This is not the traditional thinking and operation where one uses split when working a DX pileup. If you have the Split Mode set to NONE in the WSJT-X software, then there is no split command sent to the radio. Thus you can manually select SPLIT via the radio and this allows you to receive the frequency of choice on VFO A and then you can transmit on the frequency of choice on VFO B. Sorry I didn't make this clear originally. 73 Bob, K4TAX On 4/10/2020 5:32 PM, Adrian wrote: > Thanks Bob, I will try that out. > > > regards > > > Adrian , vk4tux > > On 11/4/20 8:08 am, Bob McGraw K4TAX wrote: >> In the F2 Setup Menu for WSJT-X change the SPLIT Function to NONE. >> Then set the Radio for SPLIT mode. That way you can manually adjust >> VFO A for RX and then set VFO B for the TX frequency.Just keep >> the audio tone above 1200 Hz for TX. >> >> Resolves the problem >> >> 73 >> >> Bob, K4TAX >> >> > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX3 WSJTX Split
Thanks Bob, I will try that out. regards Adrian , vk4tux On 11/4/20 8:08 am, Bob McGraw K4TAX wrote: In the F2 Setup Menu for WSJT-X change the SPLIT Function to NONE. Then set the Radio for SPLIT mode. That way you can manually adjust VFO A for RX and then set VFO B for the TX frequency. Just keep the audio tone above 1200 Hz for TX. Resolves the problem 73 Bob, K4TAX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
"60 deg C with fan not running is not normal. 60 deg C is the nominal temperature for start of fan speed 3." The conversation was continued off "list" but there are a few points that I'd like to be in the archive - There would appear to be two possible failure conditions. Either the fan is not being commanded on when temperature exceeds 50 deg C or the fan is commanded on and does not run. Fan speed 1 is easily heard by anyone with normal hearing. The fan isn't quiet. Fan operation at all speeds can be tested by using the KPA500 menu to select FAN CTL and cycling though the speeds. Commanded fan speed can be checked by using the KPA500 utility to send command "^FS;". It will return "^FS0x;" where x is the fan speed setting. 73, Andy, k3wyc __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Those dang PL259s [was: KPA 500]
With respect, why not change the subject line. :-) As it so happens, I just had an SO239 failure today! As I was moving a cable near my HF vertical, I was suddenly presented with a cable end with a PL259 still plugged in to the SO239 which should have been in the antennas connector box. The center pin of the SO239 had a broken solder joint and the main cause of the failure was that the SO239 retaining nut had disintegrated in 3 places. The rest of the connector was still in good condition. Before anyone comments - this has nothing to do with my possible KPA500 problem, which occurs on a different antenna. 73, Alan. G4GNX -- Original Message -- From: "Michael Walker" To: "Elecraft@mailman.qth.net" Sent: 10/04/2020 22:48:17 Subject: Re: [Elecraft] KPA 500 This is going to cause a big sh*t storm :) and about 900 emails before Wayne shuts it down. However, having been in RF for a bit less then most of you (only 1974), I have had connectors fail and not fail in my HF world (60Mhz or less). No Name ones have worked wonderfully for decades. Amphenol's have failed in a year. Amphenol T's in a phasing harness seem to fail the most (fell apart). But, then, who knows who makes them. What I can say is that there is, based on my personal experience, no 100% guarantee on any particular one. Install it. Visually inspect it. Make sure it is clean, dry and waterproof and a year from now, if it is outside, open it up and make sure it is still dry. It isn't eve 'you get what you pay for' any more. Next, we can have another 200 emails on how to solder a PL259. :) Mike va3mw __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KX3 WSJTX Split
In the F2 Setup Menu for WSJT-X change the SPLIT Function to NONE. Then set the Radio for SPLIT mode. That way you can manually adjust VFO A for RX and then set VFO B for the TX frequency. Just keep the audio tone above 1200 Hz for TX. Resolves the problem 73 Bob, K4TAX On 4/10/2020 4:43 PM, vk4tux wrote: I recieved this email from Japan ; "I decode you FT8 on 1840kHz that I send the JPG file to you. JAs are working split RX 1840kHz and TX 1908kHz. Please CQ JA on 1840kHz and RX 1908kHz if possible. The 160m frequency in Japan, 1810-1825kHz and 1907.5-1912.5kHz DATE Sunrise (GMT) in JA3 Apr 07: 20:34Z We hope to see you on 160m soon. TKS 73 Mas JA3FYC" I tried this, however on enable TX the VFO A and B become the same frequency on TX from wsjtx. I have cat ptt and cat control enabled, with rig split set. If I use the mic to key etc, the split remains, however something about wstx causes the VFO's to match on TX losing the split? vk4tux -- 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to rmcg...@blomand.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
This is going to cause a big sh*t storm :) and about 900 emails before Wayne shuts it down. However, having been in RF for a bit less then most of you (only 1974), I have had connectors fail and not fail in my HF world (60Mhz or less). No Name ones have worked wonderfully for decades. Amphenol's have failed in a year. Amphenol T's in a phasing harness seem to fail the most (fell apart). But, then, who knows who makes them. What I can say is that there is, based on my personal experience, no 100% guarantee on any particular one. Install it. Visually inspect it. Make sure it is clean, dry and waterproof and a year from now, if it is outside, open it up and make sure it is still dry. It isn't eve 'you get what you pay for' any more. Next, we can have another 200 emails on how to solder a PL259. :) Mike va3mw On Fri, Apr 10, 2020 at 4:37 PM Ed Pflueger wrote: > Well I was told by an unreliable source that the military had to have their > Amphenol's manufactured in the USA but were sent to Mexico for packaging. > Whether that's true or not I cannot confirm. All I know is the ones I buy > are stamped in black lettering saying "Amphenol 83-1sp and below that is > 74868 PL259 49190" and they can run around 4 bucks apiece depending on when > and where I get them. > > Ed... AB4IQ > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Brown > Sent: Friday, April 10, 2020 11:27 AM > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] KPA 500 > > On 4/10/2020 8:45 AM, Irwin Darack wrote: > > In my experience, coax connectors, barrel connectors, etc. are always > > fail points when there is a sudden increase in SWR as power is > > increased. They oxidize over time and sometimes just reconnecting or > > replacing is the first step before taking the amp apart. > > If this is happening, I'd suspect 1) the connectors have gotten wet or > 2) the are JUNK connectors. If they aren't labeled "Amphenol," they're > JUNK. > > 73, Jim K9YC > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message > delivered to ab...@comcast.net > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to va...@portcredit.net > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] KX3 WSJTX Split
I recieved this email from Japan ; "I decode you FT8 on 1840kHz that I send the JPG file to you. JAs are working split RX 1840kHz and TX 1908kHz. Please CQ JA on 1840kHz and RX 1908kHz if possible. The 160m frequency in Japan, 1810-1825kHz and 1907.5-1912.5kHz DATE Sunrise (GMT) in JA3 Apr 07: 20:34Z We hope to see you on 160m soon. TKS 73 Mas JA3FYC" I tried this, however on enable TX the VFO A and B become the same frequency on TX from wsjtx. I have cat ptt and cat control enabled, with rig split set. If I use the mic to key etc, the split remains, however something about wstx causes the VFO's to match on TX losing the split? vk4tux -- 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Test
Randy, Congratulations! You passed! :-) 73 de, Ian, NV4C On 4/10/20 2:20 PM, Randy Farmer wrote: Just a test to see if I'm getting out on the list. My last couple of emails have not appeared. 73... Randy, W8FN __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to nv4c@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
Well I was told by an unreliable source that the military had to have their Amphenol's manufactured in the USA but were sent to Mexico for packaging. Whether that's true or not I cannot confirm. All I know is the ones I buy are stamped in black lettering saying "Amphenol 83-1sp and below that is 74868 PL259 49190" and they can run around 4 bucks apiece depending on when and where I get them. Ed... AB4IQ -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Brown Sent: Friday, April 10, 2020 11:27 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA 500 On 4/10/2020 8:45 AM, Irwin Darack wrote: > In my experience, coax connectors, barrel connectors, etc. are always > fail points when there is a sudden increase in SWR as power is > increased. They oxidize over time and sometimes just reconnecting or > replacing is the first step before taking the amp apart. If this is happening, I'd suspect 1) the connectors have gotten wet or 2) the are JUNK connectors. If they aren't labeled "Amphenol," they're JUNK. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to ab...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Wanted KPA3A
I am looking for a KPA3A is anyone has one for sale. Please contact me off list Thanks Rich __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] setting KPA 100 page 48 problem
Christophe, Tune the K2 to 7100kHz Then plug the internal counter probe into TP1 and the P6 header on the Control Board. Enter the menu to CAL FCTR and hold EDIT The frequency will be seen in the K2 display. You could alternately use an external frequency counter to read the frequency at TP1. 73, Don W3FPR On 4/10/2020 2:48 PM, Christophe aufacf wrote: good evening Don, I checked the values and solders of the capacitors mentioned they are ok on the other hand remind me of the procedure to check the frequency of the VFO so as to find 12,015 KHZ pages in the assembly manual Thanks again for your help 73 , cris F8ACF Le ven. 10 avr. 2020 à 17:17, Don Wilhelm a écrit : Christophe, The most common cause of a 40 meter only failure in the K2 is an incorrect setting of the D19 secondary menu parameter. If you have the K60XV option installed, or if you installed the "Rework Eliminators" when you built the K2, you must set D19 to "y". If you do not have either the K60XV or the Rework Eliminators, then the D19 parameter must be set to "n". If the above is not applicable, you may have a problem in the 40 meter bandpass filter. Check the capacitors in that bandpass filter - C5 and C7 = 100pF, C4 and C8 = 820pF, C6 = 4.7pF. Also check the VFO frequency when the K2 is set to 7100kHz, it should be close to 12,015kHz. 73, Don W3FPR On 4/10/2020 9:29 AM, Christophe aufacf wrote: hello Don, hello everyone, this morning I tested the K2 on my own. the consumption (ampere) of K2 gave me part of the solution the K2 alone in transmission consumes 0.5 amp on 40M then on the other 2 amp bands with a setting at 5Watts so I have no broadcast on 40M only, we can hear the relays switch ... after I admit being a bit lost to know where to start I will review the soldering of relays K1, K12, K14 in case ... could you give me advice since you know the K2 very well Thanks in advance Don 73 ,F8ACF # K2 7369 - kpa 100 in progress Le ven. 10 avr. 2020 à 03:11, Don Wilhelm a écrit : Christophe, I forgot to mention, Before attempting to adjust the C1 null, first pre-set R26 and R27 to 43k ohms. Measure R26 from U5 pin 5 to ground and R27 at U5 pin 3 to ground. Then go through the nulling process followed by the power setting process that I outlined in my prior email. 73, Don W3FPR On 4/9/2020 3:25 PM, Christophe aufacf wrote: Good morning all , Zero adjustment of SWR bridge (C1) page 48 as you see on the video , I set the K2 to 5Watts https://we.tl/t-MOz5AX1v3l I managed to adjust the SWR the K2 announces my power at 0.1 Watts !! the consumption goes from 0.32 Amps in Rx, in Tune mode 0.5 amps I should have 5 Watts Thank you for your help # K2 7369 - kpa 100 in progress __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
That just goes to prove the point: Chinese manufacturers will build to whatever quality level you specify. Consider things like the iPhone and other similar devices. Most people don't complain about the quality of their iPhone or iPad. 73 de RayK2ULR -Original Message- From: Buck To: elecraft Sent: Fri, Apr 10, 2020 1:23 pm Subject: Re: [Elecraft] KPA 500 A vendor at Dayton told me *all* are made in China, even the ones marked Amphenol. k4ia, Buck K3s# 11497 Honor Roll 8B DXCC EasyWayHamBooks.com On 4/10/2020 12:43 PM, Irwin Darack wrote: > Agreed. Many people buy the cheap ones made in Chinaand they fail. > > Irwin KD3TB > >>> step before taking the amp apart. >> >> If this is happening, I'd suspect 1) the connectors have gotten wet or >> 2) the are JUNK connectors. If they aren't labeled "Amphenol," they're >> JUNK. >> >> 73, Jim K9YC >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to idar...@gmail.com >> > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to raysil...@verizon.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] setting KPA 100 page 48 problem
good evening Don, I checked the values and solders of the capacitors mentioned they are ok on the other hand remind me of the procedure to check the frequency of the VFO so as to find 12,015 KHZ pages in the assembly manual Thanks again for your help 73 , cris F8ACF Le ven. 10 avr. 2020 à 17:17, Don Wilhelm a écrit : > > Christophe, > > The most common cause of a 40 meter only failure in the K2 is an > incorrect setting of the D19 secondary menu parameter. > > If you have the K60XV option installed, or if you installed the "Rework > Eliminators" when you built the K2, you must set D19 to "y". > > If you do not have either the K60XV or the Rework Eliminators, then the > D19 parameter must be set to "n". > > If the above is not applicable, you may have a problem in the 40 meter > bandpass filter. Check the capacitors in that bandpass filter - C5 and > C7 = 100pF, C4 and C8 = 820pF, C6 = 4.7pF. > Also check the VFO frequency when the K2 is set to 7100kHz, it should be > close to 12,015kHz. > > 73, > Don W3FPR > > On 4/10/2020 9:29 AM, Christophe aufacf wrote: > > hello Don, hello everyone, > > > > this morning I tested the K2 on my own. > > > > the consumption (ampere) of K2 gave me part of the solution > > > > the K2 alone in transmission consumes 0.5 amp on 40M then on the other > > 2 amp bands with a setting at 5Watts > > > > so I have no broadcast on 40M only, we can hear the relays switch ... > > > > after I admit being a bit lost to know where to start > > > > I will review the soldering of relays K1, K12, K14 in case ... > > > > could you give me advice since you know the K2 very well > > > > Thanks in advance Don > > > > 73 ,F8ACF > > > > # K2 7369 - kpa 100 in progress > > > > Le ven. 10 avr. 2020 à 03:11, Don Wilhelm a écrit : > >> Christophe, > >> > >> I forgot to mention, > >> Before attempting to adjust the C1 null, first pre-set R26 and R27 to > >> 43k ohms. Measure R26 from U5 pin 5 to ground and R27 at U5 pin 3 to > >> ground. > >> > >> Then go through the nulling process followed by the power setting > >> process that I outlined in my prior email. > >> > >> 73, > >> Don W3FPR > >> > >> On 4/9/2020 3:25 PM, Christophe aufacf wrote: > >>> Good morning all , > >>> > >>> Zero adjustment of SWR bridge (C1) page 48 > >>> > >>> as you see on the video , I set the K2 to 5Watts > >>> > >>> https://we.tl/t-MOz5AX1v3l > >>> > >>> I managed to adjust the SWR the K2 announces my power at 0.1 Watts !! > >>> > >>> the consumption goes from 0.32 Amps in Rx, in Tune mode 0.5 amps > >>> > >>> I should have 5 Watts > >>> > >>> Thank you for your help > >>> > >>> # K2 7369 - kpa 100 in progress > > > > > -- 73 , F8ACF56 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Test
Just a test to see if I'm getting out on the list. My last couple of emails have not appeared. 73... Randy, W8FN __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] KPA 500
"After transmitting at 200W the temperature slowly rises above 60 degrees C, but the fan doesn't cut in. Does anyone know if this is normal behavior and what temperatures I should expect to see?" Nominal temperature for start of fan speed 1 is 50 deg C although my data for one test run showed several seconds at 50 deg C and fan not running. It started running just before the temperature rose to 51 deg C. 60 deg C with fan not running is not normal. 60 deg C is the nominal temperature for start of fan speed 3. 73, Andy, k3wyc __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
That’s likely true. But if he’s saying they’re the same as Chinese brand, that’s nonsense. I use a lot of connectors from Amphenol Audio which are made in China. The difference between Amphenol & equivalent Chinese is obvious on inspection. Mating is very solid and contact plating looks much nicer. Price difference about double. I think the Amphenol connectors are very fairly priced considering the quality differences. I believe the same about their RF connectors. 73 Josh W6XU Sent from my mobile device > On Apr 10, 2020, at 10:20 AM, Buck wrote: > > A vendor at Dayton told me *all* are made in China, even the ones marked > Amphenol. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
Many thanks to all who offered me solutions both on and off the list. But let me clarify ... I wasn't looking for help. My system and my station are performing very well, and I love it. I was merely offering up my experience in response to Alan, G4GNX's question (below). 73 Lyn, WØLEN -Original Message- From: Lyn Norstad [mailto:l...@lnainc.com] Sent: Friday, April 10, 2020 8:59 AM To: 'Alan - G4GNX'; 'Elecraft Reflector' Subject: RE: [Elecraft] KPA 500 At 100w on 20m, my KAT500 Utility shows an SWR of 1.00 with the KPA500 on Standby and temp around 38ºC. But as I switch the KPA to Operate and increase the power to 300w the SWR goes up as high as 1.10. If I hold it there (key down) long enough the KPA temp starts rising slowly. At about 50ºC I can hear the fan picking up speed. By the time I get to 60ºC the fan is at probably level 2 or 3. SWR is still at 1.10 (max). Right or wrong, I've always assumed there is some slight heating in the antenna system (Tuner, Balun, Lightning protection) although all components after the tuner are rated at 5 KW. 73 Lyn, WØLEN -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Alan - G4GNX Sent: Friday, April 10, 2020 6:27 AM To: Elecraft Reflector Subject: [Elecraft] KPA 500 I have a strange fault a couple of times recently, where the SWR starts to increase during the time of a single 'over'. I've been using the K3S set at 100W out, via the KPA500 (in standby) and the KAT500 tuner, without any problem, but after I've switched the linear to Operate and driving it to 200W, the SWR creeps up. I don't think it's an antenna issue, but a possible heat problem with the KPA500. I watched the temperature display on the KPA500 and initially on Standby it shows about 38 degrees C. After transmitting at 200W the temperature slowly rises above 60 degrees C, but the fan doesn't cut in. Does anyone know if this is normal behavior and what temperatures I should expect to see? I have tested the fan via the Menu function and it works as expected. 73, Alan. G4GNX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
On 4/10/2020 10:19 AM, Buck wrote: A vendor at Dayton told me *all* are made in China, even the ones marked Amphenol. Um, Apple products have long been made in China. Fair-Rite has had one or more factories in China for more than a decade. "Made in China" does NOT define the product as junk. Last I heard, Amphenol is making connectors in Mexico. Having bought and installed several hundred in the last decade, the only faults I've found are a few whose screw threads were short. And you trust someone working in a trade show booth to know this? Someone selling junk connectors who disparages a competitor? 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
Randy – I’m not the one with issues, it was Alan. I just offered up my experience for his comparison. 73 Lyn, WØLEN From: Ted Edwards W3TB [mailto:w3tb@gmail.com] Sent: Friday, April 10, 2020 10:32 AM To: Randy Farmer Cc: l...@lnainc.com; elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA 500 I am watching this with great interest. If running stations on CW my KPA500 shows low-mid 50sC and I have never known what it should be. Thanks everyone. On Fri, Apr 10, 2020 at 10:27 Randy Farmer wrote: If the initial VSWR is really measuring 1.00:1 with low power, that means the detected reflected power is exceptionally low. I'm sure the algorithm used to compute SWR sets it to 1:1 if there's zero reflected power. If the load is not really perfectly flat, as the incident power is increased the detector will finally see enough reflected energy to give an indication. You have absolutely nothing to worry about in your system. 73... Randy, W8FN On 4/10/2020 9:59 AM, Lyn Norstad wrote: > At 100w on 20m, my KAT500 Utility shows an SWR of 1.00 with the KPA500 on > Standby and temp around 38ºC. But as I switch the KPA to Operate and > increase the power to 300w the SWR goes up as high as 1.10. If I hold it > there (key down) long enough the KPA temp starts rising slowly. At about > 50ºC I can hear the fan picking up speed. By the time I get to 60ºC the fan > is at probably level 2 or 3. SWR is still at 1.10 (max). > Right or wrong, I've always assumed there is some slight heating in the > antenna system (Tuner, Balun, Lightning protection) although all components > after the tuner are rated at 5 KW. > 73 > Lyn, WØLEN __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to w3tb@gmail.com -- 73 de Ted Edwards, W3TB and GØPWW and thinking about operating CW: "Do today what others won't, so you can do tomorrow what others can't." __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
I try and spend the time to recover OLD PL-259 connectors. I have some which I've owned for 30 to 40 years. They are ugly, tarnished, and may have phenolic insulatorsbut are darn good connectors. When I encounter a bad or connector, I usually chop the connector off with about 1" of cable remaining and toss it in a box. Speaking of which, I'd say there are 10 to 15 pieces of RG-8 type cable in my junk cable box that I could recover today. Worthwhile project. 73 Bob, K4TAX On 4/10/2020 12:19 PM, Buck wrote: A vendor at Dayton told me *all* are made in China, even the ones marked Amphenol. k4ia, Buck K3s# 11497 Honor Roll 8B DXCC EasyWayHamBooks.com On 4/10/2020 12:43 PM, Irwin Darack wrote: Agreed. Many people buy the cheap ones made in Chinaand they fail. Irwin KD3TB On Fri, Apr 10, 2020 at 12:28 PM Jim Brown wrote: On 4/10/2020 8:45 AM, Irwin Darack wrote: In my experience, coax connectors, barrel connectors, etc. are always fail points when there is a sudden increase in SWR as power is increased. They oxidize over time and sometimes just reconnecting or replacing is the first step before taking the amp apart. If this is happening, I'd suspect 1) the connectors have gotten wet or 2) the are JUNK connectors. If they aren't labeled "Amphenol," they're JUNK. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to idar...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to rmcg...@blomand.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
Amphenol more than likely does QC... So I would expect the majority of their connectors to be better than the possibly non QC tested connectors. I doubt most resellers QC the connectors. I am sure some do, but I would love to know which ones do. 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist ARRL Asst. Director, NW Division, Technical Resources On 4/10/20 10:19 AM, Buck wrote: A vendor at Dayton told me *all* are made in China, even the ones marked Amphenol. k4ia, Buck K3s# 11497 Honor Roll 8B DXCC EasyWayHamBooks.com On 4/10/2020 12:43 PM, Irwin Darack wrote: Agreed. Many people buy the cheap ones made in Chinaand they fail. Irwin KD3TB On Fri, Apr 10, 2020 at 12:28 PM Jim Brown wrote: On 4/10/2020 8:45 AM, Irwin Darack wrote: In my experience, coax connectors, barrel connectors, etc. are always fail points when there is a sudden increase in SWR as power is increased. They oxidize over time and sometimes just reconnecting or replacing is the first step before taking the amp apart. If this is happening, I'd suspect 1) the connectors have gotten wet or 2) the are JUNK connectors. If they aren't labeled "Amphenol," they're JUNK. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to idar...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to d...@nk7z.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
A vendor at Dayton told me *all* are made in China, even the ones marked Amphenol. k4ia, Buck K3s# 11497 Honor Roll 8B DXCC EasyWayHamBooks.com On 4/10/2020 12:43 PM, Irwin Darack wrote: Agreed. Many people buy the cheap ones made in Chinaand they fail. Irwin KD3TB On Fri, Apr 10, 2020 at 12:28 PM Jim Brown wrote: On 4/10/2020 8:45 AM, Irwin Darack wrote: In my experience, coax connectors, barrel connectors, etc. are always fail points when there is a sudden increase in SWR as power is increased. They oxidize over time and sometimes just reconnecting or replacing is the first step before taking the amp apart. If this is happening, I'd suspect 1) the connectors have gotten wet or 2) the are JUNK connectors. If they aren't labeled "Amphenol," they're JUNK. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to idar...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
My first question is "what does it do on a dummy load?" Sounds like
something related to a bad or questionable jumper cable, loose connector
or bad connectors. I find many of today's connectors have machining
tolerance errors and more so, have only "good looking" plating. While
in fact, many of these are poor quality.
I find that PL-259 connectors must be mated correctly in that the body
of the connector has 2 small triangle shaped protrusions from the body
of the connector that must be mated with the notches on the SO-239
connector. Failure to do this will allow the connector to loosen under
use. And then the shell of the connector must be tightened a bit more
than finger tight. I keep a 4" pair of Channel Locks on the desk to
help remove and tighten connectors. If not done so, the heating and
cooling of the connector will allow it to loosen and not make good contact.
Regarding the KPA500 temperature: With my amp this morning { S/N 3519
Firmware 01.54 } at turn on 18C, I then held it at 500 watts carrier
output into a 50 ohm dummy load. At 50C fan on 1 speed, at 55C fan on 2
speed. This took about 210 seconds (3.5 minutes) from cold start to
55C on 80M into the dummy load. Other bands are less efficient and one
could expect a faster temperature rise in less time. It does vary from
band to band and antenna load to load. I did not observe any change in
SWR indication, either on the amp LED display or my Bird 43 between the
amp output and the dummy load.
Hope this helps.
73
Bob, K4TAX
On 4/10/2020 6:26 AM, Alan - G4GNX wrote:
I have a strange fault a couple of times recently, where the SWR
starts to increase during the time of a single 'over'. I've been using
the K3S set at 100W out, via the KPA500 (in standby) and the KAT500
tuner, without any problem, but after I've switched the linear to
Operate and driving it to 200W, the SWR creeps up. I don't think it's
an antenna issue, but a possible heat problem with the KPA500. I
watched the temperature display on the KPA500 and initially on Standby
it shows about 38 degrees C. After transmitting at 200W the
temperature slowly rises above 60 degrees C, but the fan doesn't cut
in. Does anyone know if this is normal behavior and what temperatures
I should expect to see? I have tested the fan via the Menu function
and it works as expected.
73,
Alan. G4GNX
__
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Re: [Elecraft] KPA 500
Agreed. Many people buy the cheap ones made in Chinaand they fail. Irwin KD3TB On Fri, Apr 10, 2020 at 12:28 PM Jim Brown wrote: > On 4/10/2020 8:45 AM, Irwin Darack wrote: > > In my experience, coax connectors, barrel connectors, etc. are always > fail > > points when there is a sudden increase in SWR as power is increased. They > > oxidize over time and sometimes just reconnecting or replacing is the > first > > step before taking the amp apart. > > If this is happening, I'd suspect 1) the connectors have gotten wet or > 2) the are JUNK connectors. If they aren't labeled "Amphenol," they're > JUNK. > > 73, Jim K9YC > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to idar...@gmail.com > -- Irwin KD3TB __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
On 4/10/2020 8:45 AM, Irwin Darack wrote: In my experience, coax connectors, barrel connectors, etc. are always fail points when there is a sudden increase in SWR as power is increased. They oxidize over time and sometimes just reconnecting or replacing is the first step before taking the amp apart. If this is happening, I'd suspect 1) the connectors have gotten wet or 2) the are JUNK connectors. If they aren't labeled "Amphenol," they're JUNK. 73, Jim K9YC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
In my experience, coax connectors, barrel connectors, etc. are always fail points when there is a sudden increase in SWR as power is increased. They oxidize over time and sometimes just reconnecting or replacing is the first step before taking the amp apart. Irwin KD3TB On Fri, Apr 10, 2020 at 11:24 AM Don Wilhelm wrote: > Alan, > > That does sound like an antenna problem - balun heating, a loose or bad > connection somewhere. > > Try that same test into a dummy load - if it shows the same behavior, > then you can blame the KPA500, but if not blame the antenna system. > > 73, > Don W3FPR > > On 4/10/2020 7:26 AM, Alan - G4GNX wrote: > > > > I have a strange fault a couple of times recently, where the SWR starts > > to increase during the time of a single 'over'. I've been using the K3S > > set at 100W out, via the KPA500 (in standby) and the KAT500 tuner, > > without any problem, but after I've switched the linear to Operate and > > driving it to 200W, the SWR creeps up. I don't think it's an antenna > > issue, but a possible heat problem with the KPA500. I watched the > > temperature display on the KPA500 and initially on Standby it shows > > about 38 degrees C. After transmitting at 200W the temperature slowly > > rises above 60 degrees C, but the fan doesn't cut in. Does anyone know > > if this is normal behavior and what temperatures I should expect to see? > > I have tested the fan via the Menu function and it works as expected. > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to idar...@gmail.com > -- Irwin KD3TB __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
I am watching this with great interest. If running stations on CW my KPA500 shows low-mid 50sC and I have never known what it should be. Thanks everyone. On Fri, Apr 10, 2020 at 10:27 Randy Farmer wrote: > If the initial VSWR is really measuring 1.00:1 with low power, that > means the detected reflected power is exceptionally low. I'm sure the > algorithm used to compute SWR sets it to 1:1 if there's zero reflected > power. If the load is not really perfectly flat, as the incident power > is increased the detector will finally see enough reflected energy to > give an indication. You have absolutely nothing to worry about in your > system. > > 73... > Randy, W8FN > > > On 4/10/2020 9:59 AM, Lyn Norstad wrote: > > At 100w on 20m, my KAT500 Utility shows an SWR of 1.00 with the KPA500 on > > Standby and temp around 38ºC. But as I switch the KPA to Operate and > > increase the power to 300w the SWR goes up as high as 1.10. If I hold it > > there (key down) long enough the KPA temp starts rising slowly. At about > > 50ºC I can hear the fan picking up speed. By the time I get to 60ºC the > fan > > is at probably level 2 or 3. SWR is still at 1.10 (max). > > Right or wrong, I've always assumed there is some slight heating in the > > antenna system (Tuner, Balun, Lightning protection) although all > components > > after the tuner are rated at 5 KW. > > 73 > > Lyn, WØLEN > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to w3tb@gmail.com -- 73 de Ted Edwards, W3TB and GØPWW and thinking about operating CW: "Do today what others won't, so you can do tomorrow what others can't." __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
I think this is a lot of worry about normal behavior. Although it's not directly discussed, some insight might be gleaned by reading through this old thread: http://elecraft.365791.n2.nabble.com/K3-SWR-Numerical-Indication-td7643839.html Wes N7WS On 4/10/2020 6:59 AM, Lyn Norstad wrote: At 100w on 20m, my KAT500 Utility shows an SWR of 1.00 with the KPA500 on Standby and temp around 38ºC. But as I switch the KPA to Operate and increase the power to 300w the SWR goes up as high as 1.10. If I hold it there (key down) long enough the KPA temp starts rising slowly. At about 50ºC I can hear the fan picking up speed. By the time I get to 60ºC the fan is at probably level 2 or 3. SWR is still at 1.10 (max). Right or wrong, I've always assumed there is some slight heating in the antenna system (Tuner, Balun, Lightning protection) although all components after the tuner are rated at 5 KW. 73 Lyn, WØLEN -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Alan - G4GNX Sent: Friday, April 10, 2020 6:27 AM To: Elecraft Reflector Subject: [Elecraft] KPA 500 I have a strange fault a couple of times recently, where the SWR starts to increase during the time of a single 'over'. I've been using the K3S set at 100W out, via the KPA500 (in standby) and the KAT500 tuner, without any problem, but after I've switched the linear to Operate and driving it to 200W, the SWR creeps up. I don't think it's an antenna issue, but a possible heat problem with the KPA500. I watched the temperature display on the KPA500 and initially on Standby it shows about 38 degrees C. After transmitting at 200W the temperature slowly rises above 60 degrees C, but the fan doesn't cut in. Does anyone know if this is normal behavior and what temperatures I should expect to see? I have tested the fan via the Menu function and it works as expected. 73, Alan. G4GNX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
If the initial VSWR is really measuring 1.00:1 with low power, that means the detected reflected power is exceptionally low. I'm sure the algorithm used to compute SWR sets it to 1:1 if there's zero reflected power. If the load is not really perfectly flat, as the incident power is increased the detector will finally see enough reflected energy to give an indication. You have absolutely nothing to worry about in your system. 73... Randy, W8FN On 4/10/2020 9:59 AM, Lyn Norstad wrote: At 100w on 20m, my KAT500 Utility shows an SWR of 1.00 with the KPA500 on Standby and temp around 38ºC. But as I switch the KPA to Operate and increase the power to 300w the SWR goes up as high as 1.10. If I hold it there (key down) long enough the KPA temp starts rising slowly. At about 50ºC I can hear the fan picking up speed. By the time I get to 60ºC the fan is at probably level 2 or 3. SWR is still at 1.10 (max). Right or wrong, I've always assumed there is some slight heating in the antenna system (Tuner, Balun, Lightning protection) although all components after the tuner are rated at 5 KW. 73 Lyn, WØLEN __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
Alan, That does sound like an antenna problem - balun heating, a loose or bad connection somewhere. Try that same test into a dummy load - if it shows the same behavior, then you can blame the KPA500, but if not blame the antenna system. 73, Don W3FPR On 4/10/2020 7:26 AM, Alan - G4GNX wrote: I have a strange fault a couple of times recently, where the SWR starts to increase during the time of a single 'over'. I've been using the K3S set at 100W out, via the KPA500 (in standby) and the KAT500 tuner, without any problem, but after I've switched the linear to Operate and driving it to 200W, the SWR creeps up. I don't think it's an antenna issue, but a possible heat problem with the KPA500. I watched the temperature display on the KPA500 and initially on Standby it shows about 38 degrees C. After transmitting at 200W the temperature slowly rises above 60 degrees C, but the fan doesn't cut in. Does anyone know if this is normal behavior and what temperatures I should expect to see? I have tested the fan via the Menu function and it works as expected. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] setting KPA 100 page 48 problem
Christophe, The most common cause of a 40 meter only failure in the K2 is an incorrect setting of the D19 secondary menu parameter. If you have the K60XV option installed, or if you installed the "Rework Eliminators" when you built the K2, you must set D19 to "y". If you do not have either the K60XV or the Rework Eliminators, then the D19 parameter must be set to "n". If the above is not applicable, you may have a problem in the 40 meter bandpass filter. Check the capacitors in that bandpass filter - C5 and C7 = 100pF, C4 and C8 = 820pF, C6 = 4.7pF. Also check the VFO frequency when the K2 is set to 7100kHz, it should be close to 12,015kHz. 73, Don W3FPR On 4/10/2020 9:29 AM, Christophe aufacf wrote: hello Don, hello everyone, this morning I tested the K2 on my own. the consumption (ampere) of K2 gave me part of the solution the K2 alone in transmission consumes 0.5 amp on 40M then on the other 2 amp bands with a setting at 5Watts so I have no broadcast on 40M only, we can hear the relays switch ... after I admit being a bit lost to know where to start I will review the soldering of relays K1, K12, K14 in case ... could you give me advice since you know the K2 very well Thanks in advance Don 73 ,F8ACF # K2 7369 - kpa 100 in progress Le ven. 10 avr. 2020 à 03:11, Don Wilhelm a écrit : Christophe, I forgot to mention, Before attempting to adjust the C1 null, first pre-set R26 and R27 to 43k ohms. Measure R26 from U5 pin 5 to ground and R27 at U5 pin 3 to ground. Then go through the nulling process followed by the power setting process that I outlined in my prior email. 73, Don W3FPR On 4/9/2020 3:25 PM, Christophe aufacf wrote: Good morning all , Zero adjustment of SWR bridge (C1) page 48 as you see on the video , I set the K2 to 5Watts https://we.tl/t-MOz5AX1v3l I managed to adjust the SWR the K2 announces my power at 0.1 Watts !! the consumption goes from 0.32 Amps in Rx, in Tune mode 0.5 amps I should have 5 Watts Thank you for your help # K2 7369 - kpa 100 in progress __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
My experience is that slowly increasing SWR is from a component heating up, usually an inductor in a tuner or balun. You don't see it with lower power. Ferrite cores change their inductance radically as they heat up near their Curie temperature. If they get to their Curie temperature, they lost their magnetic properties. As the SWR goes up, they get even hotter, SWR goes up more and if you don't stop transmitting, they will fail. All SWRs with the same number are not equal in terms of losses in a tuner or balun. As Victor described, when the load it highly reactive, there are more losses in the tuner or balun. If you have an IR thermometer, you should be able to point it at inductors and see what is getting hot. I've got a horizontal loop that is slightly too small for 160. I have an added shunt inductor in the line to allow my tuner to tune it, but the inductor, which is on a 2.4" core still gets hot. Most tuners have smaller inductors than that. My home built balun also has 2.4" cores. Many baluns use smaller cores. 73, Mark W7MLG On Fri, Apr 10, 2020 at 7:16 AM Victor Rosenthal 4X6GP wrote: > I would be more likely to suspect something after the KPA500, such as > the tuner or a balun. I've experienced significant balun heating, > especially when using a balun other than a straight-through 1:1 balun, > or when the load is highly reactive. Balun power ratings assume a > non-reactive load. > > 73, > Victor, 4X6GP > Rehovot, Israel > Formerly K2VCO > CWops no. 5 > http://www.qsl.net/k2vco/ > On 10/04/2020 14:26, Alan - G4GNX wrote: > > > > I have a strange fault a couple of times recently, where the SWR starts > > to increase during the time of a single 'over'. I've been using the K3S > > set at 100W out, via the KPA500 (in standby) and the KAT500 tuner, > > without any problem, but after I've switched the linear to Operate and > > driving it to 200W, the SWR creeps up. I don't think it's an antenna > > issue, but a possible heat problem with the KPA500. I watched the > > temperature display on the KPA500 and initially on Standby it shows > > about 38 degrees C. After transmitting at 200W the temperature slowly > > rises above 60 degrees C, but the fan doesn't cut in. Does anyone know > > if this is normal behavior and what temperatures I should expect to see? > > I have tested the fan via the Menu function and it works as expected. > > > > 73, > > > > Alan. G4GNX > > > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to k2vco@gmail.com > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to marklgoldb...@gmail.com > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
I would be more likely to suspect something after the KPA500, such as the tuner or a balun. I've experienced significant balun heating, especially when using a balun other than a straight-through 1:1 balun, or when the load is highly reactive. Balun power ratings assume a non-reactive load. 73, Victor, 4X6GP Rehovot, Israel Formerly K2VCO CWops no. 5 http://www.qsl.net/k2vco/ On 10/04/2020 14:26, Alan - G4GNX wrote: I have a strange fault a couple of times recently, where the SWR starts to increase during the time of a single 'over'. I've been using the K3S set at 100W out, via the KPA500 (in standby) and the KAT500 tuner, without any problem, but after I've switched the linear to Operate and driving it to 200W, the SWR creeps up. I don't think it's an antenna issue, but a possible heat problem with the KPA500. I watched the temperature display on the KPA500 and initially on Standby it shows about 38 degrees C. After transmitting at 200W the temperature slowly rises above 60 degrees C, but the fan doesn't cut in. Does anyone know if this is normal behavior and what temperatures I should expect to see? I have tested the fan via the Menu function and it works as expected. 73, Alan. G4GNX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to k2vco@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KPA 500
At 100w on 20m, my KAT500 Utility shows an SWR of 1.00 with the KPA500 on Standby and temp around 38ºC. But as I switch the KPA to Operate and increase the power to 300w the SWR goes up as high as 1.10. If I hold it there (key down) long enough the KPA temp starts rising slowly. At about 50ºC I can hear the fan picking up speed. By the time I get to 60ºC the fan is at probably level 2 or 3. SWR is still at 1.10 (max). Right or wrong, I've always assumed there is some slight heating in the antenna system (Tuner, Balun, Lightning protection) although all components after the tuner are rated at 5 KW. 73 Lyn, WØLEN -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Alan - G4GNX Sent: Friday, April 10, 2020 6:27 AM To: Elecraft Reflector Subject: [Elecraft] KPA 500 I have a strange fault a couple of times recently, where the SWR starts to increase during the time of a single 'over'. I've been using the K3S set at 100W out, via the KPA500 (in standby) and the KAT500 tuner, without any problem, but after I've switched the linear to Operate and driving it to 200W, the SWR creeps up. I don't think it's an antenna issue, but a possible heat problem with the KPA500. I watched the temperature display on the KPA500 and initially on Standby it shows about 38 degrees C. After transmitting at 200W the temperature slowly rises above 60 degrees C, but the fan doesn't cut in. Does anyone know if this is normal behavior and what temperatures I should expect to see? I have tested the fan via the Menu function and it works as expected. 73, Alan. G4GNX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] setting KPA 100 page 48 problem
hello Don, hello everyone, this morning I tested the K2 on my own. the consumption (ampere) of K2 gave me part of the solution the K2 alone in transmission consumes 0.5 amp on 40M then on the other 2 amp bands with a setting at 5Watts so I have no broadcast on 40M only, we can hear the relays switch ... after I admit being a bit lost to know where to start I will review the soldering of relays K1, K12, K14 in case ... could you give me advice since you know the K2 very well Thanks in advance Don 73 ,F8ACF # K2 7369 - kpa 100 in progress Le ven. 10 avr. 2020 à 03:11, Don Wilhelm a écrit : > > Christophe, > > I forgot to mention, > Before attempting to adjust the C1 null, first pre-set R26 and R27 to > 43k ohms. Measure R26 from U5 pin 5 to ground and R27 at U5 pin 3 to > ground. > > Then go through the nulling process followed by the power setting > process that I outlined in my prior email. > > 73, > Don W3FPR > > On 4/9/2020 3:25 PM, Christophe aufacf wrote: > > Good morning all , > > > > Zero adjustment of SWR bridge (C1) page 48 > > > > as you see on the video , I set the K2 to 5Watts > > > > https://we.tl/t-MOz5AX1v3l > > > > I managed to adjust the SWR the K2 announces my power at 0.1 Watts !! > > > > the consumption goes from 0.32 Amps in Rx, in Tune mode 0.5 amps > > > > I should have 5 Watts > > > > Thank you for your help > > > > # K2 7369 - kpa 100 in progress -- 73 , F8ACF56 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] KPA 500
I have a strange fault a couple of times recently, where the SWR starts to increase during the time of a single 'over'. I've been using the K3S set at 100W out, via the KPA500 (in standby) and the KAT500 tuner, without any problem, but after I've switched the linear to Operate and driving it to 200W, the SWR creeps up. I don't think it's an antenna issue, but a possible heat problem with the KPA500. I watched the temperature display on the KPA500 and initially on Standby it shows about 38 degrees C. After transmitting at 200W the temperature slowly rises above 60 degrees C, but the fan doesn't cut in. Does anyone know if this is normal behavior and what temperatures I should expect to see? I have tested the fan via the Menu function and it works as expected. 73, Alan. G4GNX __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
