Had a strange problem with my K2 S/N 1422, built back in 2000 it appeared the preamp had gotten blown, in a recent thunderstorm, even though the antennas were all grounded through the antenna switch and the rig was off. Anyway I was able to get on the air with the preamp off, but with preamp on sigs were way down all this past week. Yesterday, I got around to trouble shooting the problem, all the voltages were correct on Q21 (the 2N5109 preamp transistor). So I started to inject a signal at the relay and everything appears to work again fb, check out reveals the problem has gone away. Checked for poor solder connections and all are fine, I think there must have been the relay for the preamp sticking and just opening up the K2 must have unstuck it. I really gave the preamp and is working fine. Just wonder if anyone else has had a similar problem? Just for my own peace of mine, I have started disconnecting the K2 from the antenna swich, and I have a good relay I plan to use to provide a extra level of isolation between the K2 and the antenna switch. 72, Steve Ray K4JPN ex K1VKW EM82ep Warner Robins GA Elecraft K2 1422 & KPA-100 Heath Fan HW-101, HW-8 http://www.thewinstonator.com/K4JPN.htm
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