[GreenKeys] Teletype TT-36/GGA-1 TD for crypto system

[Paul Heller]

AWESOME! Thanks so much Nick, and to Paul Cembura.

Paul
W2TTY



> On Mar 16, 2020, at 8:33 AM, Nick England <navy.radio at gmail.com> wrote:
> 
> Paul Cembura let me borrow his manual RS-5562 for scanning, RS- means it is a Restricted publication, the first I have seen.
> http://www.navy-radio.com/manuals/tty/5562RS-ENG-iss1-4612.pdf <http://www.navy-radio.com/manuals/tty/5562RS-ENG-iss1-4612.pdf>
> 
> This manual covers Duncan's strange TD (TT-36/GGA-1) which we have discussed before. When enciphering plain text this tape reader breaks a clear text tape into 5 letter groups, inserts CR/CR/LF after 10 groups, etc. When deciphering it takes out the extraneous spaces between 5 letter groups.
> 
> As best I can tell from this manual and from a little AN/GGA-1 description, I believe that this was used to feed characters to the KL-47 off-line crypto machine. Or, using the ENG 308 Translator, it could be used to feed an ECM Mk II crypto machine (which was normally an off-line manual machine).
> 
> Photos of the GGA-1 and Duncan's TT-36 are at
> http://www.navy-radio.com/crypto.htm#gga1 <http://www.navy-radio.com/crypto.htm#gga1>
> 
> Any additional info, etc, is greatly appreciated.
> 
> Cheers,
> Nick England K4NYW
> www.navy-radio.com <http://www.navy-radio.com/>
> 
> 
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