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
