[Elecraft] Audio Ground Loop Isolation XFRMR?

[dw]

I have a switch-box at my station which allows me to switch back and
forth between the K3 audio and PC audio.
This allows me to have SDR running on the PC and I can also listen to
the K3 in one ear and the PC in the other.

Any way, I've been experiencing ground-loop noise from my PC.
I've tried three different isolation transformers and they all work, but
with significant signal loss from the PC.
Does anyone have a suggestion?

Thanks!
N1BBR :-]
-- 
 Bw_dw at fastmail.net