As I remember, we used 18 Kc and 13 Kc. We didn't have hertz in those days
:)

We were able to copy Jim Creek when submerged in the Red Sea. Jim Creek had
13 miles of wire suspended between two mountains in what was probably the
worlds biggest capacitance hat.

All CW , because even a 150 cycle shift for rtty would have thrown the tank
circuit out of resonance. Now no one would be able to copy it...


"Roy Lewallen" wrote in message
...
Asimov wrote:

Thanks for the info. I had read that submarines communicated in a
band of a few 10's of Hz because of the problems with water. As for
the polar molecules aligning themselves, this implies it takes some
time to achieve. Thus there is a resonnant point in this and if there
is resonnance then there might be anti-resonnance too. Might you know
where this natural molecular resonnance is? Might this be the standard
microwave oven frequency?

Sorry, I don't know. If any of the readers of this newsgroup do, I'd
really appreciate your enlightening us.

Roy Lewallen, W7EL