Jan: I've had this problem several times over the years. Intermittent quiet during Rx, tap the key to send a squirt of RF and the band livens up. For a while.
When I first encountered this, my first suspicion was a 40 meter only problem with my ICOM transceiver. My tower climbing buddy just moved slightly and retightened all the cable clamps on the linear loading wires of my 40 meter beam and the problem went away. (I've since replaced that antenna). One time it was a loose coaxial cable connector. It's hard to find these. They might require certain temperature or humidity or wind or ... to re-create. I have a number of connectors between the radio and the antennas. Sometimes I can isolate the behavior to one band or another, and that helps me locate where in my switching arrangement the problem might lie. The K3 (and KPA500, and KXPA100) use solid state devices for T/R switching, and tend to have "working fine" or "not working at all" behavior. 73 de Dick, K6KR -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Jan Sent: Wednesday, March 26, 2014 7:57 AM To: [email protected] Subject: Re: [Elecraft] T/R switching problem The T/R problem has occurred with different antennas. However, there are several interconnecting coax cables in the line, and these do not change. All are soldered, but they are quite old, and home-constructed. I suspect that if it is a cable problem, it is in the shack. I will pursue this line of investigation and report back. Thanks to those who have helped me to take a step forward on this problem. 73, Jan, KX2A ______________________________________________________________ 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 Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
