I am getting RF interference when SSB on 20 meters on my Elecraft K3. A warble in the audio (with either the speaker or headphones) starts at about 5 watts which gets much worse as I increase power to the point the audio is just a screech. It works fine on CW. I have no problems on other bands both above and below, just 20 meters on SSB. I still get the distortion on the sidetone with audio and RF gain turned to the minimums.
My antenna is an Ultimax DXpedition with a buried ground plane and a six foot ground rod attached to the start of the ground plane wiring. I wrapped about 50 turns of #16 stranded around the feed coax close to the antenna junction box as a choke, and also attached a 17.3 foot wire off the ground plane to resonate at 14.15 MHz as a friend suggested. Nothing helped. I've only been licensed since July, so this is all new to me. Thanks for any help. Ron Gruner K4RHG ______________________________________________________________ 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
