"RB" wrote in message
.. .
What dc voltage do many of the loran antenna couplers operate off of?
I've
heard 5vdc. Is this correct?

Just curious.

Yes, some were 5vdc, and some were 9, others 12, one oldtimer, I forget the
brand, used a +12 and a -12vdc (I think that was for oldtimer op amps)
Old Chief Lynn