I had these symptoms (with another radio) and eventually tracked it down to a corroded junction where a saddle clamp joined parts of the linear loading wire on my short 40m beam.
Dick, K6KR Sent from my iPhone On Mar 27, 2010, at 10:44 AM, Vic K2VCO <v...@rakefet.com> wrote: > On 3/27/2010 9:02 AM, Ron W3ZV wrote: >> I am playing in the contest today. I have had two instances where my >> receiver gain has gone down dramatically. It sounds like I have >> switched >> to the second antenna with nothing attached. Engaging PTT brings it >> back. I installed the second receiver and DVR a week ago. Has been >> working fine until today. The problem is not reproducible. Happens on >> its own schedule. > > Often this kind of problem is caused by an intermittent poor > connection somewhere in the > antenna system, a dirty relay contact if you have any relays in the > path, etc. As soon as > you hit it with a bit of RF, it cleans up and works for a while. But > in receive, the > voltage is so low that it stays in high-resistance mode. > > Check the coax connectors, relays if any, etc. > > I had the exact symptom about a year ago when I had a balun with a > corroded solder connection. > -- > Vic, K2VCO > Fresno CA > http://www.qsl.net/k2vco/ > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
