[GreenKeys] Model 40 TEMPEST interface schematic

[Nick England]

It is a long shot, but ya never know what someone might have in a stack of
old stuff..
403628 is the interface from +/-6v MIL-STD signalling to Model 40 TEMPEST
equipment.
drawing - https://www.navy-radio.com/tty/m40/m40-tempest-interface.jpg
photo - https://www.navy-radio.com/tty/m40/m40-tempest-interface-02.jpg

It has 303180 and 303181 PC cards to drive/receive optoisolators in the
TEMPEST controller.
I'd like to find a schematic for those cards. The cards are also used in
the 405932 EIA interface version. Or an actual 303180 or 303181 card - I
can always reverse engineer a diagram.
The wiring diagram package for the interface is WDP0457.

Cheers,
Nick England K4NYW
Chapel Hill NC
www.navy-radio.com
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