Anyone familiar with the USN UGA-1  16 channel TTY multiplexer, used with the UGC-3 radio ?

I have a large ‘Teletype Corporation’ preliminary instruction book, and man does it look “prelim”,

with lots of sort of unpolished drawings. Lots of transistors. This must be for a VHF system, right,

or they couldn’t put that many channels on a signal ? Can someone give me the short version of

what this system was about ? Date on manual, 1960.

-Hue Miller

Newport, Oregon