[Elecraft] K3 with KSYN3A 100Hz spurious

[Dave]

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