Jack, my K3 is stable, sounds to me that you might have a grounding problem or traces of feedback. Not an inherent problem with the K3
Best regards, Tim Hague, M0AFJ Skype m0afj.Tim Sent on my iPad On 21 Jul 2013, at 20:12, JACK WHITE <[email protected]> wrote: > Hello K3 Reflector. > > > I have an issue with my new K3/100 #7482. On SSB the peak power output isn't > stable. The SSB power output fluctuates about +/- 15% of where it is set, but > occasionally spikes to much more. The issue is on all bands but seems worse > on 12/10m. I have tested the rig connected straight to a 1kW Bird 50ohm load > and have tried 2 different linear power supplies. The problem is present > using the two tone test feature, microphone or direct PC audio fed into the > rig. > > > The real problem is: I set up my Acom 1000 at the legal limit here (400w) and > the power output is all over the place, sometimes 150w, then maybe 500w, then > 300w, then all of a sudden the power can spike to 1kW+. I operate mostly CW. > Things seem more stable on CW, but compared to my previous Jap rigs > (FT1000MP, FT990, TS850) etc, the power output is very difficult to properly > regulate. On my previous rigs, I'd set them up to drive the Acom to a certain > power level and they'd run for hours rock solid without a peep. > > > I've had an e-mail exchange with a friendly Elecraft Guy which resulted in me > redoing the TX Gain calibration, he said the numbers looked good, but the > problem persists. I am curious to see if anybody else has this issue and > knows of a fix? As it is, the rig isn't much use to me. > > > > Cheers > > > > Jack G8DX > ______________________________________________________________ > 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
