[GreenKeys] 10 Hz shift RTTY?

[Bruce Gentry]

It was tried during the cold war using AM broadcast stations to send 
RTTY over a wide area.  AM stations must keep their frequency within 20 
cycles of their assigned frequency, so a 10 cycle FSK shift would be 
within limits. It should not be noticable to listeners, unless they had 
and  turned  on a BFO, and had good pitch to hear  the shift. I don't 
know how well it worked,  the project ended after a few years. If it had 
worked out, it might have given WLW a chance to resurrect their 500KW 
transmitter.

      Bruce Gentry      KA2IVY

On 7/25/17 4:55 PM, Nick England wrote:
> So, who used 10 cps shift?
> I just noticed that the AN/URA-8B (CV-89A) manual has a change notice 
> (T-4) to improve operation when using 10-cycle shift deviation. My, 
> that isn't very shifty!
>
> Nick England K4NYW
> www.navy-radio.com <http://www.navy-radio.com>
>
>
> ______________________________________________________________
> 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/20170725/aaa5dcc8/attachment.html>