Wes, thanks for the insight and it's interesting someone else has the same problem (s meter behaving oddly when rf gain backed off, plus noisy rx).
In my case I had calibrated the rf gain using an external sig gen. I asked elecraft support about this and at Dale's suggestion I redid the calibration using factory defaults. This has cleared the problem with the s meter and has also removed the problem whereby the S/N reduced immediately I turned back the rf gain. Quite what the solution is for you, Wes, I'm not sure, except that doing a rf gain calibration with different levels of input signal might allow you to hit the right answer. At others' suggestions, I have also experimented with AGC parameters. I found that the rx sounded better with AGC THR=2 (the minimum), but it could do with being even lower. (I mean a lower number). Graham ----- Original Message ----- From: "Wes Stewart" <[email protected]> To: <[email protected]> Sent: Friday, December 18, 2009 4:09 PM Subject: Re: [Elecraft] Noisy K3 receiver "The more you turn RF GAIN back, the higher the S-Meter will read." Well, that's the way it should work, but I can assure you that with my K3 with the factory default RF Gain calibration, turning the control counterclockwise from max would cause the S-meter to increase at first, then *decrease* and then increase again as the control reached minimum gain. That is why I've said repeatedly, NOT ALL K3s BEHAVE THE SAME WAY with respect to RF gain and AGC. ______________________________________________________________ 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
