[Milsurplus] [GreenKeys] 1953 airborne RTTY unit

[Jim Haynes]

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.