Mike, I am certain Marcin will be interested in your results when portable. The only thing that I can think of is a bad connection in the KPA100 T-R switch, but then I am just guessing. Marcins's problem continues until the KPA100 switches out at the 10 watt level, so your problem may be different.
73, Don W3FPR > -----Original Message----- > Don, > > I am experiencing the same or a very similar problem as Marcin. It > only happens on 17M and only at high power. That is why we do not > see it after a Tune operation. If I turn the power down to 30W or > less, no problem. It makes no difference whether the KPA100 is the > top cover or remoted in an EC2 with the KAT100. I haven't determined > exactly how much power I have to be running before the problem > occurs. I suspect RF getting somewhere it shouldn't but have not had > the time to track it down. It does seem to be antenna dependent even > though I get a good match to the 102 foot doublet I use. I will get > a chance to test my theory next week when I take the K2/100 portable > for a week using a different antenna than I do at home. If it occurs > only at the home QTH then the problem is in the antenna system and > probably stray RF affecting something in the K2. > > 73, > Mike K2/100 #2221 > > At 01:31 PM 9/6/2006, Don Wilhelm wrote: > >Marcin, > > > >There is nothing in the KPA100 or the base K2 that would cause > that problem > >on 17 meters only. > >In the base K2, the relay switching is shared for 17 and 15 meters except > >for relay K6 in the bandpass filter, and in the KPA100, all circuits are > >shared between 17 and 20 meters. You would have a problem on either 20 > >meters or 15 meters in addition to 17 meters if it was associated with > >either the K2 or KPA100 switching relays. > > > >If you have a dedicated 17 meter antenna, you may want to investigate the > >switching to that antenna. > > > >TUNE should behave the same as transmit, but you say that receive > >sensitivity does not drop after TUNE - that is indeed strange. > We need more > >data. > > > >73, > >Don W3FPR > > > _______________________________________________ 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
