standard Horizon Quantum & Raymarine Sportpilots interference
 

Hi, List
I have a peculiar problem , when my Standard Horizon is listening on
Ch16 and the sportspilot is on, after some time ( anything from 5 to 30
mins) I get interference breakthrough on the radio, which even at
maximum squelch cant stop it. The interference starts breaking through
at normal squelch levels first and breaks through intermittingly then
graduly its breaks through at maximum squelch and the radio is
unusable.

The radio is about 1 foot from the autopilot as thats all space there
is on the console. I've tried ferrites in the leads, moving the power
leads away from each other etc. all to no avail.

All suggestion welcome!.

Dave