Jonathan, It is not a "well-known problem", but I believe you are correct to assume the problem source is in the T/R switch. I would suggest that you check diodes D11, D12 and D14 first - or just replace them, 1N4007s are plentiful and inexpensive.
73, Don W3FPR Jonathan Taylor, K1RFD wrote: > K2/100 # 2462, with all options except DSP. > > I've noticed just recently that when turning the Power above 10 W (and > hearing the relays click), the receiver gain drops 20 or 30 dB. The > receiver returns to normal sensitivity when the Power knob is returned > to a lower setting. > > This must have starting happening only recently. The rig is working > fine on transmit at all power levels. > > Looking at the schematic, I suspect the the first place to look will be > the T-R switch in the KPA100, but I thought I would post to the list to > see if this is a well-known problem. > > ______________________________________________________________ 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
