[Elecraft] RF in Microphone

[Jim Brown]

On Sun,3/26/2017 9:31 AM, Jim Kutsch wrote:
> I am getting reports
> that my audio is distorted sounding like RF is getting into the microphone.

In writing my previous response, I forgot to mention this mechanism, 
which can cause exactly what you are experiencing, and which has nothing 
to do with RFI. This is only an issue when audio is being fed to the rig 
via some audio accessory that runs on DC from the some power supply as 
the rig.

http://k9yc.com/PowerSupplyBondingAndAudioDistortion.pdf

73, Jim K9YC