I have a
ships small LF antenna NAVSTAR. It is enclosed in a white plastic
case and
the actual antenna is a single sided copper clad board 475 mm long
by 35
mm wide. This is attached to an amplifier with 3 transistors, one
2N3823
and two 2N3904, there are two pot cores at the output side going to
the
coax to RX.
Hi Mal
Navstar made equipment for use with the Decca Navigator
chain, frequencies from approx 70 to 100 KHz, and it sounds like
what you've got might be one of the antennas from that.
I had some Navstar kit in the past and found it almost impossible to find
information.
Unless anybody knows better I'd suggest tracing the circuit yourself as it
sounds fairly simple.
Marine low voltage was generally 24 but starting at 12 and seeing how it
goes probably wouldn't hurt.
As long as it's not tuned it could be quite useful as a general antenna for
LF.
regards
Nigel
G8PZR
