[GreenKeys] TT-76/GGC (was Dayton Epilog Update

[Duncan Brown]

Jim,

Welcome to the world of Kleinschmidt & Army/AF teletypewriters! I was a 
TT repairman in the Army and spent my year in Viet Nam keeping them 
running. I am still keeping them running at the Antique Wireless Museum.

In 1950, looking for something lighter weight than the Teletype Corp. 
M15, the Signal Corps gave the TTY contract to Kleinschmidt Laboratories 
Inc. (aka "KLI") - They later merged with SCM. Their first unit was the 
TT-4 page printer, major component of the AN/PGC-1. It was a tactical 
page printer, with a waterproof case and could be strapped to your pack 
frame. Then came the TT-76 reperforator/tape transmitter, major 
component of the AN/GGC-3, also a tactical machine. The TT-4 & TT-76 
normally have OD (olive drab) covers (although I have seen grey ones).  
Then,  fixed station machines where designed, always with grey covers.  
The basic "fixed" page printer (a deluxe version of the TT-4 and using 
many of the same parts) was the TT-98, major component of the AN/FGC-20. 
(but TT-98s were also used in field RTTY units such as the AN/GRC- 26D, 
-46, & -122/142)  There are many version of the TT-98, such as your 
TT-483, but they are all very similar.

All TT-4 and TT-76 machines were supplied with series-governed motors 
(instead of synchronous), since in the field you would probably be 
running off a generator.  Other KLI equipment was available with either 
series-governed  or synchronous motors. You need a 180vps tuning fork to 
set the speed of the series governed motors. If you were lucky, there 
was one in your TT-76. Otherwise, you can just make a little LED flasher 
that operates at 180 flashes/min.

There is a KLI military catalog available at 
http://navy-radio.com/manuals/tty/Kleinschmidt_Cat_70.pdf  which will 
show you the differences between models and also list the Technical 
Manuals (TMs). TMs that end in "-12" are operator's manuals; ones that 
end in "-35" are maintenance manuals.

Have fun,
Duncan Brown, K2OEQ
USASA  31J30

Antique Wireless Association Museum Asst. Curator, Commercial Equipment
(also Chief TTY operator & repairman)
http://www.antiquewireless.org/



On 26-May-16 19:15, Howard Weeks wrote:
>  The AN/GGC-3 designation refers to a system of machines rather that a 
> stand alone machine. Really stretching my memory but I think the GGC-3 
> refers to a 76 and a TT-98 page printer.


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