COLIN LAMB wrote:
Although I have never measured it, I recall the average current drain for my
Becker transonder is only a couple hundred ma. The reason is that only
pulses are sent out and the average power consumed is pretty low.

Not everyone has (or can afford) a Becker transponder. A Terra will
happily consume several times that amount. And, try measuring the drain
from the encoder at altitude, particularly if it's one with a heater...

Marc