[GreenKeys] 20 M RTTY

[John Vendely]

This is the Russian Navy 7-bit synchronous system known colloquially as 
"36-50".  It has a 36 baud phasing sequence (sometimes mistaken for RYs) 
followed by a preamble, then encrypted synchronous data.  50 baud with 
250 or 500 shift seems the most common, though others are occasionally 
heard.  They sometimes send operator chat or ID's using FSK morse for 
short periods.  These transmissions are all over the HF bands, and the 
Russians seem to place them more or less wherever they please.  I have a 
decoder for this mode, but have never observed any traffic in the clear.



73,

John K9WT

On 9/19/2015 9:59 AM, Duncan Brown wrote:
> This week's ARRL Bulletin has an article  on  intruders in the amateur 
> bands.  One of them is
>    "In addition the Russian Navy was reported active frequently on 
> 14.192.0 MHz using FM CW."
>
> I definitely heard RTTY on that frequency and also around 14.180. It 
> sounded like a RY test tape.  But later, when I had access to FSK 
> equipment, I couldn't tune it in.  If the signal is too weak to copy 
> well at your QTH, try WEBSDR.org for access to a Software Defined 
> Radio at various QTHs around the world.
>
> Report any intruders in the Amateur Bands to the ARRL Intruder Watch 
> program - http://www.arrl.org/intruder-watch - or your regional IARU 
> Monitoring System.  Vigilance Always!
>
> 73,
>
> Duncan
> K2OEQ
>
> On 14-Aug-15 09:32, Larry wrote:
>> Listening this morning on 14,193.9 LSB to what sounds like a 50 baud 
>> 500 cycle shift.  Can't get enough to do much with but it's coming 
>> from about the 10 degree east of north heading from me here in 
>> Arizona.  Possibly someone on the east coast or Europe can do better 
>> with it.  It's continuous so it's not an amateur station.
>>
>> Anyone do anything with it?
>>
>> Larry
>> W0OGH
>>
>> ______________________________________________________________
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