I feel sure that Jim and W3LPL are right. That rasping note is a big, big clue that some *other* electronic device is also involved - something else, in addition to your two K3s.
That "unknown third party" device is what you need to find. Begin by switching off power to whole sections of the house, and then go around methodically unplugging individual devices. Murphy says: it's something of yours, and it's right there in the shack. 73 from Ian GM3SEK >-----Original Message----- >From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of >Jim Brown >Sent: 23 February 2016 04:42 >To: elecraft@mailman.qth.net >Subject: Re: [Elecraft] Slighty off topic - 80 meter second harmnic how to >stop > >When I posted on this issue to another list, W3LPL responded that it's >fairly common for harmonics with this sort of characteristic to be >generated in active electronics like switching power supplies. Sort of >identifying which is the culprit and choking every cable connected to >it, there's no solution. > >73, Jim K9YC > >On Mon,2/22/2016 8:34 PM, paulb wrote: >> For what ever reason the harmonic is still very present..darn.. >> oddly has a rasping note not pure carrier. >> >> A close ham about 400 meters away can also hear the 2nd hamonnic, >> band pass in or out makes little change. > >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:Elecraft@mailman.qth.net > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html >Message delivered to gm3...@ifwtech.co.uk ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
