John Posted: I adjusted R1 until the noise was just the same in and out, but verified that with AGC in, strong stations were suppressed. The correct setting for me was with R1 at less than half the maximum. Say John Out of curiosity (BTW I got 3.84 volts as well) what voltage did you end up with after you redid the threshold setting? Dave WB9SOG (SN #3231)