[GreenKeys] FSK on WABC

[Larry Tighe]

What with George saying all those Clear Channel 1A stations doing FSK, there 
must've been quite a dependable commo network...one direction....around the 
USA.  All those are on their frequency exclusively ...not sharing the 
channel anywhere and devoid of AM nite skip interference...ever.  Cuba did, 
for a while, run some really high power interfering with WOR...a 1B shared 
channel...I don't know of any others.  My late friend, John Serafin..W2KQT, 
later W2QD, was a VP of engineering and told me of the FSK.

lar
----- Original Message ----- 
From: "Richard Dillman" <ddillman at igc.org>
To: "Larry Tighe" <larryradio at worldnet.att.net>; "Nick England" 
<navy.radio at gmail.com>; <greenkeys at mailman.qth.net>
Sent: Tuesday, December 01, 2009 12:44 PM
Subject: FSK on WABC


>
>>The military had contracted with WABC  770 KHz in NYC to operate FSK, 
>>very,
>>very narrow, in the 70's.  I was unable to find out much about it in those
>>days...it was imperceptible on the AM radio.
>
> I read your post with great interest.  A friend was a studio engineer at 
> WABC at the time and once told me how he happened to notice that the 
> needle on the station's frequency monitor was bouncing all over the scale. 
> He was told "you don't need to worry about that" but later found out about 
> the program you mention.  I was never able to find anything more about it 
> so I was glad to see your post as confirmation that the program did indeed 
> exist.
>
> One assumes it was for submarine communications but I wonder if anyone has 
> any further details.
>
> Regards,
>
> RD
>