Yes, Stewart asks a good question. As I reported previously, I had to install an ICE 196 RF Limiter in the Beverage feedline to prevent my Acom from generating "ArcFault" errors on 160M.
73, Barry N1EU Stewart G3RXQ wrote: > > Are you using a separate RX antenna ? There is a recognised issue > with the KXV3 and insufficient isolation that can give rise to > spurious oscillations. > > 73 > Stewart G3RXQ > On Sun, 10 Feb 2008 21:43:55 +0100, Björn Mohr wrote: >> I had my first weekend with the new K3 and bumped into a strange > problem. It >> actually took me a while to figure out what was going on. When > keying up >> with the amplifier in line on 160 I was not able to run more > than 400 watts >> before the SWR protection in both the amp and SWR meter kicked > in, it all >> happened in milliseconds as if arcing was going on somewhere. I > thought I >> had an antenna problem and went through the system without > finding anything >> strange. After some time I hooked up my MP and all was fine > again, running >> full power without a problem. That's when it hit me - RF > feedback had to be >> throwing my K3 off frequency and therefore tripping SWR > protection and the >> alarm. >> >> My setup has been working fine with the MP for over a year, > never seen a >> problem like this. A common mode choke is in line with the TX > antenna and >> most of the wiring used with the MP was used for the K3 except > that power >> where fetched from my 12 volt bus. The MP is a field model and > gets its >> power straight from the mains, same phase as the 12 volt bus. >> >> I would be interested to hear if anyone else had similar > problems and found >> a good solution. >> >> 73 de Björn /SM0MDG >> >> >> _______________________________________________ >> Elecraft mailing list >> Post to: [email protected] >> You must be a subscriber to post to the list. >> Subscriber Info (Addr. Change, sub, unsub etc.): >> http://mailman.qth.net/mailman/listinfo/elecraft >> >> Help: http://mailman.qth.net/subscribers.htm >> Elecraft web page: http://www.elecraft.com > > > _______________________________________________ > Elecraft mailing list > Post to: [email protected] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > -- View this message in context: http://www.nabble.com/K3-SSB-Strange-behaviour-tp15350056p15410851.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
