[GreenKeys] More on AN/UGC-504, AN/UGC-136 Teletype

[Dave Hunter]

AN/UGC-504, AN/UGC-136 Teletype Notes:

First challenge, plug wiring. I doped that out July second, 
by using an ohmmeter back through the Captor Corp. line 
filter in the unit. The socket for the power is 
incorporated in the filter, and the filter is well buried 
in the unit, so this was the easiest way. It took a while, 
as with the filter buried, it was almost impossible to get 
a lead on one of the outputs of the filter to check from it 
back to the power connector pins.

However, the wiring on the Amphenol MS3113H14C5PW is as 
follows:

Pins A, B - AC line
Pin C - Ground.

I tried the wiring out first on one of my units, by using 
miniature octal tube socket pins wired onto an AC cord. 
Turned it on, and away it went, but defaulted in an error 
state.

http://www.qsl.net/vy2ac/ugc-504.html

I then tried it on my second unit, and voila, it came to 
life. This unit had several smaller problems solved through 
swapping from the first unit (I bought the second unit just 
so I would have spares).

The ribbon, of course was dried out, as expected. The copy 
light bulbs were burned out on this unit and were swapped 
out. A switch on the keyboard was broken (but repairable), 
so I simply swapped out the keyboard from the other unit 
for now. The fan is lethargic and slow to start, but I do 
have the other to put in it, or may simply lubricate it. 

I turned on the print switch on the keyboard, then held 
down the message key, and inputted a short message. Voila, 
it printed out as hoped for.

Needless to say, the temporary AC connection will be 
replaced ASAP with the proper mating connector.

Dave




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