I had not intentionally been using other antenna ports on the K3. When I shut the system off the night before, I had been receiving on the transmit antenna just fine. It's possible that I inadvertently hit some button on the K3, but whatever state I got into, it got fixed when I turned on the amp. It surprised me ... I was expecting to be chasing down an antenna switch problem or bad feedline.
I have an accessory DC supply that powers up and down with the same power strip that runs the K3's DC supply. I turn that strip off after shutting off the K3 by its front panel. One item powered by the accessory supply is a remote antenna switch that grounds all the feedlines when it gets powered off. But it's not interfaced to any band outputs or anything, just a rotary switch on the desk that I didn't touch. That switch feeds 12 VDC directly to relays in the switch box. No logic or other sensitive electronics is in that circuit. The selected antenna is always connected as soon as the K3 gets powered up. The KPA500 is not on a power strip. It's always plugged into a live 240 VAC outlet. That pretty well describes my antenna selection. -- Carl > It sounds like the bypass relay either was not contacting on > the receive side properly or the antenna was somehow > otherwise disconnected from the amplifier receive path to the > K3. Are you sure the K3 was set for the antenna port the > amplifier was connected to? When the KPA powers up, it sends > a "KPA powered on" message to the K3 which can cause the K3 > to make changes. Perhaps this is what caused the antenna to > be connected? > > More details, please. > > Jack Brindle, W6FB ______________________________________________________________ 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
