Exactly.

All those radios were designed long before GPS. They are noisy and will
interfere with GPS.

That's the reason King made the "A" series of the 155 and 165. They are
designed to co-exist with GPS.


Karl
wrote in message
...
If I understand the reply, noted below, then the intereference is a
stronger signal than the satellites. You cannot fix the impossible!
Either you increase the power of the satellites many miles away to
make it stronger than the local interference or remove the local
interference.

As for the older equipment it was probably less sensitive or used
different frequencies within the receiver. Sadly that's how
electronics works. If you put the GPS antenna close to a source of
interference it will pick it up.

Interferece problems were often reported by viewers, of TV in UK,
using indoor antennas. Whilst they may work it is more by luck.