I have K2 s/n 4426 and have been using it for over 1 yr. I built it orginally as the qrp radio with all options except the KIO2. I have also built the K2/100 options and use this only at the home qth and take the battery qrp configuration on travel. I have recently started noticing distorted or "buzzing" riding on type of the audio. This is most audible on CW with strong signals, but I can also her it on SSB voice signals as well. It almost sounds like the person I'm listening to has rf on THEIR signal, though I know this is not the case as EVERY signal has this noise. I hear it most pronounced when using the 100W amp lid, but I can also hear it when using the qrp lid. Here is perhaps a clue to the source....when I lift up the front of the lid on either the 100W lid or qrp lid about 2" high, the noise goes away completely. In fact, if I tilt up the front of the lid, and stick the handle of my screwdriver underneath it to hold it up, the audio is perfect...Could something on the motherboard of the K2 be generating just enough noise to get picked up by the audio sections/speaker wires in the lids of my rig? Rig has SSB, DSP options installed. The noise comes through whether I'm using an external speaker or headphones, it doesn't matter. I do not have a scope to do any snooping, but any ideas that could help me eliminate this noise thru trial and error would be appreciated. The radio is still usable, but this is somewhat irritating and frustrating... Thx 73 K5GUS _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft
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