Been enjoying KPA500 #32 for a couple of days now. Haven't yet made a lot of QSOs with it, but the extra power on RTTY and to bust a couple SSB pile-ups has been welcome.
However, the amp does not like my 40m setup. As soon as I transmit it instantly goes into high reflected power fault and shuts down. My antenna is a 120 foot center fed wire using 1 inch ladder line and an LDG 1 kw auto tuner. SWR on 40m is under 2:1 and the K3 and other rigs I've used it with have always been happy with the antenna arrangement. In experimenting I used the K3 tune function and reduced the power in steps to see if I could reach a low enough power level that it would operate, but even at 1 watt of drive the amp still instantly went into fault. On 80m it did the same thing the first time I tried it, but then I manually tweaked the antenna tuner, got a lower SWR reading and then the amp worked. On the higher bands that I've tried there has been no problem. So, any idea what is causing this? 73 Nels K1UR ______________________________________________________________ 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
