Don, What I should have mentioned in my initial post was that the recording was made at midday on 80m and the noise from the antenna was only s1. For a given setting of the rf gain, increasing the threshold to 8 increases the noise, as can be heard in the recording.
John G3XRJ > > The solution is to RAISE the threshold. I run mine at 008 which is the > max. I also run the slope at 002 which makes the K3 AGC response more > like my K2 - weak signals sound weaker than stronger signals. You can > alter the slope without running into the situation where the K3 sounds > noisy, but the signals will sound more nearly the same as the slope > numbers get larger. > > If your local noise is high, increase the AGC threshold and the K3 will > quiet down. > There is yet another way - turn off the preamp, and even turn on the > attenuator. You will have to increase your normal AF Gain a bit, but the > noise will be reduced. If you can still hear an increase in the audio > output when the antenna is connected, you can even reduce the RF gain. > You are not increasing the USABLE receiver sensitivity by running > everything at full right controls - in the presence of atmospheric > noise, that will only reduce the usable dynamic range and will make the > receiver sound noisy. > > 73, > Don W3FPR > > ______________________________________________________________ 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
