I also had some distorted audio reports on my transmitted SSB signal when I first got my K3. I finally narrowed it down to the fact that I had it connected to my computer (RS-232 for sure and I might have been feeding the receive audio into the computer sound card as well). I made a K3 chassis to computer chassis bonding strap using some RG-8 braided shield. I started out with the strap being about three feet long and kept shortening it until the distortion totally went away at about 12 inches long (verified using a second battery powered rig to listen to my own signal).
So the first thing I would do is make sure all of your gear adheres to proper bonding practice.
73, Dave AB7E
Ray W2RS wrote: My KXPA100 transmits distorted audio on SSB, but works normally on CW and RTTY. With 100 watts output, drain current is 11.7 A and supply voltage is 13.1 V, down from 13.7 V on receive. My power supply is a pre-MFJ Astron RS-35A. The KX3 with which I drive it operates normally on all bands and modes, with good transmit audio. Speech compression is off and mic gain is set to 20. Should I send the amp back to Elecraft for service, or is there another problem? 73 Ray W2RS
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