"10Squared" wrote

One thing I have noted about my EKP-IV is that it produces radio noise on
the aviation frequencies.

Hard to believe that an aviation GPS would cause problems with your aviation
radios.

Does it make noise on the batteries and the power converter?

Power converters are often the source of much RF noise.

I also would be interested in hearing from other EKP-IV owners, to see if
they experience these problems, also. If not, it could be a problem with
you radio installation.
--
Jim in NC