[GreenKeys] 28 KSR SKINTIGHT AUCTION

[George B. Hutchison]

I believe that the TT-176 is a Tempest Unit, with cheesy model 32 
style keyboard, optical distributor in the left rear corner, and 
half-amp selector magnet coils and the mu-metal shield over the 
magnets.

All wiring is in shielded/armored cable, and has three pin military 
connectors. I think the Electrical Service Unit is referred to as a 
"bustle".

I believe the seller, "ipullgees" is possibly a former greenkeyer 
who is either a fighter pilot or test pilot. This is good, as I 
recall the man having some good taste in gear.

Dealing with Tempest stuff is a different world. Those with ST-8000A 
TUs are fortunate in that one of the output sigs from the ST-8000A 
is Mil-188, which is what the tempest world is all about. It's kinda 
like RS-232, except that the signal excursions are limited to plus 
and minus 6 volts, and is inverted, I.E. Mark = Plus 6 volts, and 
Space =  Minus 6 Volts. Works just fine with NPN keying transistors.

W7TTY