Steve, 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 On 10/8/2010 10:25 AM, Steve Wedge wrote: > John, I've noticed the same thing: the AGC does seem to make the receiver - > in the absence of signals - roar quite a bit with my early (#770) K3. > > I've attributed a lot of the noise to computer and suburban hash, but > listening with my old Drake receiver shows things much quieter. Noise > reduction does help, but it would be nice to quiet this down as John suggests. > > My .02 > > Steve, W1ES > ______________________________________________________________ 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
