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Jim Scales wrote

<......
Recently, I noticed that when the PTT was used the oil temperature number as
well as the outside air temperature number went down.  Took me a few tests to
realize what was really happening and, yes, when I talked on the radio the
numbers on those two instruments, along with the aforementioned fuel gauge
numbers, changed.
......>

You are not alone.

I have an EPI 800 (VM1000 forerunner) and all of the temperatures go wacky
during transmit on either the Garmin 430 or the Terra Comm.  These seem to be
especially sensitive to VHF RF.  Most temperature leads are shielded and so
is the computer.  Other composite aircraft with VM1000's experience the same
problem to varying degrees with King or other radios. I join with you in
seeking a solution!

Scott Krueger
N92EX

PS Any of you carbon guys see this problem?

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