I can't believe someone on this list will not have a use for this device. Not mine, posting for a friend. Contact him directly.
   ve3amz@sympatico.ca   John

Manufacturer: Control Data Computing devices
Model: SDA-103 Sig. Dist. Meter TTY
Price: $50.00
This is a Control Data, SDA 103 signal distortion meter. It will measure distortion on RS-232 or 60 / 20 ma dc loops (T-R-S jacks) . It is particularly good for setting up the signal generator contacts on a 28 or 35 TTY. I have the complete service manual including all schematics. The input is a BNC and included is an external RS-232 adapter. There are twelve preset baud rates that can be selected.
It was built in Canada and is in excellent condition. Everything works as it should.
$50.00 plus shipping or P/U in Waterloo Ont.