As some with 1, er 2, er uhh, several of these, the loop has to be backwards polarity to trick the call unit into thinking the call is connected. Once you do it works like a normal loop and the CCU isn't really used. Note its not a normal telephone, it was specific to the telex service and was not connected to a POTS line.

Welcome to the club! Maybe if you're in earshot we can get on the air tty-to-tty sometime! (I also occasionally operate TTY from Battleship NJ).

Jeff



On Mon, Jul 13, 2026 at 6:44 PM Dennis Kwasny via GreenKeys <greenkeys@mailman.qth.net> wrote:

Hello to all,

 

I acquired a model 32 ASR  that was used in western union telex service. I would like to try to restore and use it for amateur radio RTTY. The motor runs but I believe the call control unit is not operational and there does not appear to be any loop current to the selector magnets so the keyboard is not functioning at this time.

 

I have tried to locate schematics (Navy Radio site) for the machine, but to no avail. Paul Cembura (Mr. Teletype) has told me that these machines were proprietary to western union so there isn’t any schematic information from teletype corp.

 

My questions are:

 

  1. Does anyone have schematics or wiring diagrams for a  western union model 32 they would be willing to share?
  2. Does anyone know what speed and baud rate the machine might have operated at when it was used by western union?

 

Appreciate any help in advance.

 

Dennis

WA8ZRK

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