[GreenKeys] ID Unknown TU

[Jack]

Alf,

 

The AN/SGC-1 was popular back in the "real RTTY" days. It was very
easy to

convert to standard RTTY tones (I had a few of them back then).
There

was an article in an old RTTY Journal about how to convert it. It
also had

a rudimentary "autostart" feature for motor control which would
make

sense if it was used on VHF circuits. It was not a good TU for HF
use.

 

I believe the tones were 500 and 700 HZ. There were some later
Tempest

Dovetron terminal units that were modified to tune down to those
low tones.  The

"normal" MARK/SPACE tone range for the Dovetrons was 1000 to 3000
HZ.

 

73,

Jack K2TTY

 

 

 

From: GreenKeys [mailto:greenkeys-bounces at mailman.qth.net] On
Behalf Of Alf Fisher
Sent: Sunday, December 18, 2016 9:00 AM
To: greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] ID Unknown TU

 

Hi,

A big thank you to Jack, Nick and Jeff for ID-ing this TU so
quickly.

I'm sure other will have recognised it too.

Curiosity now satisfied.

 

Alf

 

From: Jeffrey D Angus <mailto:jdangus at att.net>  

Sent: Sunday, December 18, 2016 1:15 PM

To: greenkeys at mailman.qth.net <mailto:greenkeys at mailman.qth.net>  

Subject: Re: [GreenKeys] ID Unknown TU

 

On 12/18/2016 7:09 AM, Jack wrote:

Navy AN/SGC1.  Basic RTTY converter, two low tones. 

Jack. K2TTY

 <http://www.virhistory.com/navy/rtty/sgc1/sgc1a-op.pdf>
<http://www.virhistory.com/navy/rtty/sgc1/sgc1a-op.pdf>





-- 
Jeff-1.0
wa6fwi
http://www.foxsmercantile.com
  _____  


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