Guys, Here a problem I don't understand. K2 # 3612 with: NB SSB 20W intrnal tuner
The problem: When listening on SSB filter OPT1, 40m band and antenna connected, a bit of bandnoise is present. The S-meter is on S 5-7 or so with no signals around. Signals are clear. When they are strong the S meter functions as it should with those signals. With no signal meter drops back to S 5-7. Switching in the the other filters (width 2.12, 1.87, 1.78) at that time (no signals present) makes the S-meter drop to S 0-1 and bandnoise is more audible and S-meter flickering on QRN and so, as it should I think. It seems that something is triggering the AGC when I switch in the OPT1 filter, but I cannot figure out what it is and why. The funny (?) thing is that if using the OPT1 filter, the s-meter reacts to switching off the pre-amp and switching in the attenuator (as expected) Disconnect the antenna and the s-meter also drops to S 0. I've taken out the NB and the tuner: no change in this behaviour. Sure in need of good advice. Thanks in advance. Arie PA3A _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
