Re: [Elecraft] Using the K3s Tune button causes a growing SWR on my KPA500

I had something similar happen, and it was the capacitor in the EFHW heating up on 12 and 10 meters.  It didn't  heat up on any other bands. On 7/17/22 11:38, Andy Durbin wrote: Don't need to have ferrite in the antenna system to see this sort of SWR "runaway". I have the same problem with

Re: [Elecraft] Stacking KPA on KAT

I just built my power combo this last week.  The stand-offs inside the KAT-500 are designed specifically for supporting the weight of the KPA-500.  It's fine! On 7/23/22 11:44, Ken Winterling wrote: Like Jim, I've had my KPA on top for years. No heat issues because the KPA generates the heat a

[Elecraft] KPA-500 timing settings IC-7300

ntation on Elecraft's FTP site, e.g. the key line going to the tuner, then the amp.  That document says nothing regarding timing. 73 to all! Tom N4LSJ. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/el

Re: [Elecraft] KPA500 Also faulting for High SWR inappropriately

I got a KPA500 this summer and it was doing a lot of faulting.  I had to "correct" a few things that were just fine at 100 watts. 1: I discovered that a solder joint in the UNUN had gone bad, and fixed that.  That solved most of the faults. 2: With still the occasional fault, I looked again and

Re: [Elecraft] KPA500 gain variation with serial number

Mine was bought new in the Summer of 2022 and on most bands it needs watts to be in the mid to upper 30s to get the 500 out. On 7/20/23 13:04, Andy Durbin wrote: I have been told that the gain of the KPA500 has increased over the years it has been produced. "Early" KPA500 are reported to nee

Re: [Elecraft] KPA500 / KAT500 and W2 watt meter question

The KAT500 will interrupt the amp properly.  Radio key line goes to KAT, then KAT key line goes to KPA.  Coax is opposite: Rig to Amp, then Amp to Tuner, then Tuner to Antenna. On 10/10/23 08:17, Glenn Maclean wrote: I just ordered the KPA500/KAT500 combo and W2 watt meter for my K3S. Should I

[Elecraft] Dumb question about KAT-500 Manual

ing to the top jack on the KAT.  EXCEPT: Page 15.  It has the jacks on the KAT reversed.  Is that intentional?  If so, why is it reversed only for the Icom?  Also, I couldn't find any errata on this on the elecraft site.  Does one exist if it's an error? Sorry if this is a stupi

Re: [Elecraft] Dumb question about KAT-500 Manual

matter which of the connectors is connected to the exciter or amp. 73 de Dick, K6KR On Nov 14, 2023, at 15:51, Tom N4LSJ wrote: I'm going thru the KAT-500 manual (Rev D1) and on several pages it shows key line connections. In all of them that use the RCA plug key line connections to th

[Elecraft] Check your rig (was KAT-500 + KPA-500 / SWR Thresholds)

es more than 1% then tune next time PTT is pushed.  It took lots of frustration to finally find this issue.  After turning that off, the KAT happily memory tunes to the frequency I send it and I can call a station with no tuning. Tom N4LSJ On 1/1/24 19:46, Jeff Wandling wrote: Thanks. That