Vic K2VCO wrote on Saturday, February 21, 2009 3:32 PM >> The cause in the K2 case is that the CW sidetone oscillator signal gets >> into the VCO's varicap circuit and frequency modulates the VCO. The >> sidebands that I can see coming from my K2 in CW mode are symmetrical >> above and below carrier, one pair about 90db below carrier and the others >> much lower in amplitude. Their level varies with band. > > I had a bad case of this with my K2 and fixed it by replacing the quad DAC > IC.
------------------------------------- Hi Vic, I tried that with my K2, and it should have made some difference, but maybe the quad DACs that I bought fell off the back of a truck. So I have not bothered to do anything more because the sidebands are so far down, and not heard by anyone that I have asked to check when signals are S9+. This question was asked by Doug about K3s, but I thought that I would mention the K2 in case the K3's sidetone signal does something similar. 73, Geoff GM4ESD ______________________________________________________________ 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
