Keith, Did you ever look at the vfo B voltage display whilst transmitting to check volt drop?
I would have thought the transceiver would turn itself off before the transmitted audio ceased if you had a volt drop problem. The radio tends to give you current warnings during these events as it tries to meet the power level programmed. Using a short custom APP cable rated for 50 amps and 30 amp power supply close at 15v is well worthwhile. I run a 15v 30A sw/mode on the P3 (Can't get much closer than that), with a secondary supply from a 7 cell LA battery bank with its own 15v 25A linear PS. Dons advice regarding the app connectors is great, but not sure if that was your issue. The fact that you cleaned up the rfi area with no re-occurrence of the issue says a lot. Adrian ... vk4tux Nb, list owners, 2nd attempt on this post, on previous I received; "Mail System Error - Returned Mail" "Reporting-MTA: dns; nschwmtas04p.mx.bigpond.com Arrival-Date: Sun, 29 Jul 2012 19:02:45 +0000 Received-From-MTA: dns; nschwotgx03p.mx.bigpond.com (144.131.195.133) Final-Recipient: RFC822; <[email protected]> Action: failed Status: 5.2.0 Remote-MTA: dns; mailman.qth.net (69.16.226.196) Diagnostic-Code: smtp; 554 5.7.1 Service unavailable; Client host [61.9.189.146] blocked using zen.spamhaus.org; http://www.spamhaus.org/query/bl?ip=61.9.189.146"; -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Keith Heimbold Sent: Sunday, 29 July 2012 11:54 PM To: [email protected] Cc: [email protected] Subject: Re: [Elecraft] K3 transmit audio cuts out Don, I am pretty sure that we found the culprit. The APP connectors did not click properly for the one set and I am examining the ones for the other. I will need to be more diligent in making sure I get a good click inserting into the plastic housing. I spent a lot of time rooting out any RFI issues but I guess that is really time well spent since cleaning up my shack and all the cables and wires is probably a good idea. Thanks, Keith AG6AZ Sent from my iPhone please excuse typos On Jul 29, 2012, at 6:34 AM, "Don Wilhelm" <[email protected]> wrote: > Keith, > > If your APP connectors do not mate with a bit of a *click*, then they > are assembled incorrectly. The blades of the conductors *must* be locked over the tips of the spring fingers located in the housing. > > Things come in threes so the sayings go, I have repaired 2 KPA100s in > the last week which did not have the blades of the APP connector fully seated - I am waiting on the 3rd one. > > 73, > Don W3FPR > > On 7/28/2012 11:10 PM, Keith Heimbold wrote: >> Don, >> >> I am now starting to think that it is an issue with my power >> connectors that I am using. >> >> I bought some additional ferrites and put the balun design 1113u in >> line to take care of RFI but i know believe that the power connectors are a little intermittent at times. I don't always get a solid click when inserting into the back of the K3 or into the power supply line. I like the convenience of those type of connectors but they do seem to loosen up over time. >> >> Thanks again, >> >> Keith >> AG6AZ >> >> Sent from my iPhone please excuse typos >> >> On Jul 28, 2012, at 3:44 PM, "Don Wilhelm" <[email protected]> wrote: >> >>> Keith, >>> >>> You could also have a loose connection in your microphone cable. >>> When operating SSB, if there is no audio, there will be no RF output. >>> So you can look at the PTT, the audio, the power supply, and just >>> about every thing else in your station. Cables are usually the weak link. >>> >>> 73, >>> Don W3FPR >>> >>> On 7/28/2012 5:34 PM, Keith Heimbold wrote: >>>> Gene, >>>> >>>> Great suggestion. It maybe the connector going into the rig or the connectors which I built. >>>> >>>> Thanks, >>>> >>>> Keith >>>> AG6AZ >>>> >>>> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net Please help support this >> email list: http://www.qsl.net/donate.html >> > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
