[GreenKeys] TTY test set AN/UGM-6(V) manual and/or info needed

[Nick England]

I just acquired an AN/UGM-6(V) TTY test set - generates character, word, or
fox message with various types of distortion.
http://www.virhistory.com/navy/rtty/misc/ugm6-1506-01.JPG

Does anyone have one of these to answer a question - or better yet, a
manual I could buy/borrow to copy?

The question is that there are 3 empty printed circuit card slots - these
might be for an option (hence the (V)) but I don't know whether this is
fatal or not.

BTW, this was on eBay for $300 or Best Offer - I offered $35 and was
accepted - it never hurts to ask.

Thanks,
Nick England K4NYW
www.navy-radio.com
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