A 750 wpm M28 in 1956 - wow!

The original AN/UGC-74 (non -A) designed by Kleinschmidt had a similar printing system, but could only do 100 wpm in Baudot and 150 wpm in ASCII.  The AN/FGC-80 probably had similar printing mechanism, but only did 214 wpm in Baudot.

The Space Shuttle printer (see Curious Mark's YouTube videos) also had the rotating drums and looked like it could have been derived from the AN/UGC-74, but don't know what speed it operated at.

Have fun,

Duncan
K2OEQ



On 8/21/2026 2:39 PM, Nick England via GreenKeys wrote:
Zounds!

"The AN/FGC-36 Page Teletypewriter Set is used to exchange typewriter
page messages between two or more distant points when connected by
a telegraph channel, and to record information received at high
speed on a multiple wire basis from such devices as computers.
The operating speeds are 368.1 opm (60 wpm), 404 opm (66 wpm), 460 opm
(75 wpm), 600 opm (100 wpm), 1440 opm (250 wpm) and 4500 opm (750 wpm)
as desired."

"Printing is accomplished on-the-fly with 78 continuously rotating type
wheels and 78 print hammers, Each print hammer mechanism is tripped
by its respective electro-magnet which is energized at the right time
by the Storage and Control units, The hammer is propelled against the
rotating type wheel by motor power in & regenerative action that provides
close timing and, thus, accurate registration of the printed
character,"

https://www.navy-radio.com/manuals/tty/239b-fgc36-iss1-5607.pdf

Jim Haynes saw one (the only one?) of these back in the day. Did any survive?

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