Has anyone noticed the GPS altitude and what the altimeter says become
increasingly different as altitude increases? (i.e. 10-12k+)?

This difference seems much more pronounced the higher I go. (Yes, I do
have the correct altimeter setting...) The GPS always seems to read
250-500 feet higher.

--Dan



Dan Luke wrote:
"Mike Spera" wrote:

But, I disconnected the remote and put on the stubby (you have to remove
the power plug - another not so great design idea). It still failed in
exactly the same way. So, a different antenna and different location did
not solve the problem.

What was the location of the remote antenna? If it was on the glare shield,
the stub antenna on the yoke wasn't much farther from the radio stack.

I don't have enough data yet to make the case for a DOA exchange. Since the
weather today is blotto, I will have to test tomorrow morning or during the
week.

Yes, it could be an intermittent antenna connection or such in the unit, but
try putting the remote antenna as far back in the airplane as possible and
see what happens. Then try shutting radios, etc. down.

I''ve had no reception problems with my 396 except when using the stub
antenna in the car.

--
Dan
C-172RG at BFM