Eric,

We have installed our MRX in the panel, and so far without issues. I
put one large dia (non split) ferrite on the power line to to MRX.
Ferrites are designed to work at a particular range of frequencies, so
you might look into that. Also, run the power line through the core
3-4 times. each time improves noise suppression. Don't use the clamp
on half shell type ferrites because if the two halves are not
contacting, the ferrite does not do it's job. Otherwise, turn the
squelch up! ;-)

Matt