[GreenKeys] What Came After Model 28? and other Musings

[Nick England]

Some later KSR units that I know about are -

AN/UGC-20  (Model 28 compact - metal case, plastic keyboard
http://www.navy-radio.com/ships/bb61/DSC02061.JPG
This uses a M28 page printer with a plastic keyboard (5-level version of
M33).
These had wire switches at the end of the keyboard code bars. 5-wire
parallel electrical connection from the keyboard to a distributor driven by
the printer motor. Also was a TEMPEST low level version UGC-77 which had
photocell keyboard and photocell distributor (and an outboard circuit box
with keyer and magnet drivers). These are common aboard ships I have seen
with comms updated in the 1970's

AN/UGC-41 (MITE)
http://www.navy-radio.com/tty/ksr/ugc41-01.JPG
Seen on subs and some other ships

There are some USN numbers assigned to Teletype Model 37 units but I don't
know anything about their actual use
http://www.baudot.net/teletype/M37.htm
https://www.youtube.com/watch?v=p-KE_qhy41M

Some model that I don't know - used with NAVMACS UYK-20 computers
http://www.kh6bb.org/new1.jpg

Teletype Model 40 - I know almost zero about these but have seen them on
1980's updates - CRT displays
http://www.kh6bb.org/c1a.jpg

Also see here -
http://www.kh6bb.org/photos1.html

Waterfall - a 3 or 4 tier cabinet with stacked M28 printers
http://www.navy-radio.com/ships/bb62/p1010029.jpg

Nick England K4NYW
www.navy-radio.com

On Thu, Aug 6, 2015 at 8:59 PM, Whitebear1122 <whitebear1122 at comcast.net>
wrote:

> When I was in the US Navy in 1972, a Radioman on the USS Okinawa LPH-3,
> they had a Teletype machine that was "after" the Model 28.  It was a lot
> smaller, it looked like a small table top box with a keyboard, cut.   What
> I do remember was that it was POS.  The Teletype Repairman was pulling his
> hair out trying to keep it running.
>
> All I recall is that the keys were attached via thin stiff wires rather
> than stamped metal pieces.  The TTY repairman would have to tweak the stiff
> wires to get a key working again.  That was the main failure mechanism,
> random keys would suddenly stop working and the wires had to be bent.  It
> wasn't the wildly popular computer Model 33 either.  Something earlier.
>
> ...
>
> Someone used the term "waterfall" on here recently.  I wonder if that's
> the rack mounted 28 mechanism.  The Okinawa had at least two of those racks
> that held something like 4 or six  28 printers stacked on top of each other.
>
> 73, Scott WA9WFA
> <http://www.qsl.net/donate.html>
>
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