I need to apologise to the group and to my old K3... the problem wasn’t the K3 after all. It turned out to be my Icom IC-7300 displaying an S9 carrier from the K3 as having 100Hz sidebands and also producing a loud buzz from the speaker.
Feeding the 7300 with an S9 level from a signal generator showed the problem was with the Icom. I have no idea what caused the problem which was present before a firmware upgrade, and after upgrading to version 1.40. Doing a full reset of the 7300 cured the problem. 73 Dave G4AON -- Sent from my iPhone SE ______________________________________________________________ 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
