[GreenKeys] 10 Hz shift RTTY?

[David I. Emery]

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  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."