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

Quite possible, however, 13 Kc and 18 Kc fall into the VLF range. The
original poster mentioned ELF. ELF is down in the "cycles", we didn't
have "kilos" at our ELF transmitters

Scott
N0EDV

Fred W4JLE wrote:
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

One could couple into a crystal oscillator NAA's signal and then listen 15
kHz to the side of the oscillator's frequency for great CW practice. BIG
signal. 73 Mac N8TT

--
J. Mc Laughlin; Michigan U.S.A.
Home:
"Fred W4JLE" wrote in message
...
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...