John, You will nost likely find the problem in the Low Pass Filter board. My suspicion is that the LPF is not working and letting 2nd and 3rd harmonic energy through - and the net effect is modulation of the KX1 output waveform.
73, Don W3FPR On 6/5/2012 8:25 AM, [email protected] wrote: > Hello Group, > > I've just completed building KX1 # 2644, including the KXB3080 module, > and have discovered a problem. > > All progress testing and alignment proceeded smoothly to the end of > both manuals. But I've noticed that when listening to the KX1's > transmitted signal (using my K3 as receiver) on 20m only is very > raspy. It sounds distorted, with what sounds like another signal > lower in frequency. In fact, it sounds a little like that low > frequency buzzing you hear when you grab the audio plug connected to > the input of an audio amplifier. > ______________________________________________________________ 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
