Is a transponder not a transmitter? Output power is directly related to
voltage.

I was flying back from PA to Columbus, OH a few weeks ago and lost the
alternator. I was talking with Indy center. I shut off everything but the
transponder, one comm and the tail strobe. Eventually, the controller asked
for my altitude, as the voltage had apparently dropped enough that she
wasn't getting a reply, but I was still able to communicate.

"Orval Fairbairn" wrote in message
news
In article . net,
Michelle P wrote:

The problem is if you have a communications or transponder problem then
you must turn around and leave the ADIZ on the most direct route out and
away from the center. He may not have done this. Maryland (2W5) is
inside the ADIZ. I have not talked to him yet. He was leaving the
airport when I was just landing from my morning Traffic run.
Michelle

The problem here is that you really don't know if your TXP has failed if
you can't communicate with anyone. Transmitters are usually the first
things to go off line when the voltage drops.

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