[GreenKeys] 1953 airborne RTTY unit

[Duncan Brown]

Jim,

Sounds like you are describing the TT-30/AGA-1.  (see Ed #'s site for 
more info).  It is a M31 with 26 VDC motor-generator & 35L6GT motor 
control.  It has M15 type transmitting contacts with an extra contact 
that closes for every contact - it is the "type-to-talk" switch!  We 
have one at the AWA Museum (probably a prototype from the Teletype Corp 
Museum.)

Was there another version of the DC M31/TT-30?

73 & have fun,

Duncan
K2OEQ

On 04-Oct-15 21:21, Jim Haynes wrote:
> What a kluge!
>
> The AF also had a RTTY setup invovling either the ARC-21 or the
> ARC-65 - I forget which.  Used a TTY which I think was called AN/PGC-1
> which I think was the airborne version of the Model 31.  The airborne
> version ran off 26VDC, used a vacuum tube in the motor speed governor
> circuit to reduce RFI from the governor contacts, and as I recall
> the motor was also a dynamotor generating B+ for the associated RTTY
> modem.
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