Since I installed the KIO3B in my K3 I have had issues with RF getting into
the computer and into the radio via the ACC port (a toroid on the cable
helped). I currently have the K3 on the bench, but parts are due tomorrow
so I will be back on in a couple of days. I can't remember the last time I
made a phone Q on it though so I will check that out. Will probably as did
some ferrite on the USB cable too.

On Mon, Nov 23, 2020, 10:52 Bill Rogers W3UL <w3ul.b...@gmail.com> wrote:

> I'm guessing that I'm not the first to notice this on the K3S.  I don't do
> much SSB but was active in Sweepstakes this past weekend and noted that
> occasionally the audio would go dead.  Looking around I found that the MIC
> gain had dropped from the usual (about 16) down to zero.  I placed a toroid
> around the MIC cable and this seemed to prevent the problem most (but not
> all) of the time.  The MIC cable (and the K3S) both sit next to an Alpha
> 87A amp.  I don't recall reading about this. Is some protective function
> being activated?
>
> --
> 73,
> William (Bill) Rogers / W3UL
> Annapolis, Maryland U.S.A.
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