[GreenKeys] 10 Hz shift RTTY?

[Raymond Cote]

Submarines need not surface to receive. Its called a floating wire. 70khz is transmitted everywhere, not ground wave, not sky wave but thru the earth for the most part. Transmitting from subs is another story


Raymond Côté

Ex US Navy ET1 (SS)

Submarine service



Ex Univ of Hawaii

Oceanographer

underwater volcanology

Ham license -KD9CCZ
Commercial radio telephone license PG-21-3809

On Jul 25, 2017, at 18:42, David I. Emery <die at dieconsulting.com<mailto:die at dieconsulting.com>> wrote:

On Tue, Jul 25, 2017 at 07:00:17PM -0400, Ralph Mowery wrote:
I don't know what the limits are, but there is a certain speed limit you can
send at on a given frequency.

Don't recall what they were using to communicate with the submarines on
about 20 KHz, but the speed was very slow like just a couple of words per
minute.

   Much of that is 50 baud.

   But there was the 76 HZ ELF system... which was very slow...
and used just as a bell ringer wake up mechanism... to get the sub
to ascend to depths it could receive faster signals...



--
 Dave Emery N1PRE/AE, die at dieconsulting.com<mailto:die at dieconsulting.com>  DIE Consulting, Weston, Mass 02493
"An empty zombie mind with a forlorn barely readable weatherbeaten
'For Rent' sign still vainly flapping outside on the weed encrusted pole - in
celebration of what could have been, but wasn't and is not to be now either."

______________________________________________________________
GreenKeys mailing list
Home: http://mailman.qth.net/mailman/listinfo/greenkeys
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:GreenKeys at mailman.qth.net

2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20170726/6eeec881/attachment.html>