Subject: [Elecraft] Intermittent loss of power output K3 Good day
Late last year, my K3 (no 6957) developed a fault. The symptoms were: 1. No power output when keying the rig 2. TX LED on when keyed, (sidetone generated in CW mode) 3. Single bar showing on the RF power meter, whatever scale, ie 0 - 10 or 0 - 100 4. ATU tune command: relays clicking, TX LED on, no power output, no indication on SWR meter; two horizontal dashes in the VFO A display area where normally one would see the resolving SWR; in VFO B area 5.0W is indicated 5. TX gain calibration failed on 5W and 50W; mW TX calibration gain OK Peter M0RYB Thank you to all who have responded to my post. The board connection pins are gold plated, and all look bright and shiny like new. The TMP connectors, however, all are tarnished on the outside, although the mating surfaces look clean; I will get some Deoxit and give them a going-over. The diodes D36 and D37 in the SWR bridge tested in situ showed a forward voltage of 0.362V and a reverse open circuit, so they seem to be fine. Peter M0RYB ______________________________________________________________ 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
