[GreenKeys] Teletype

[Nick England]

TT-47/UG has a synchronous motor, TT-48/UG has a governed motor

TT-47/UG is a a standard US Navy item -
NObsr-xxx is the Bureau of Ships contract number
xxxx:CTT is the serial number
CTT is the USN manufacturer code for Teletype Corp

TT-47/UG - Model 28 Keyboard Send-Receive Page Printer Set. Consists of
floor cabinet, friction feed typing unit, electrical service unit,
keyboard, synchronous motor and gears for 45.5 baud. 7.42 unit code, 60 Hz,
115VAC. Includes communication symbol arrangement and selective calling
feature.

best regards,
Nick K4NYW
http://www.navy-radio.com/navy-tty.htm


On Sun, May 11, 2014 at 11:13 AM, zeke440 . <asekely at hotmail.com> wrote:

>
> >>Curious, it is 60 cycle. Did the DOD use their own 60 cycle power in EU
> ?<<
>
> Yes in many fixed stations were Generator powered.  all the RTTY eq was
> powered by portable Generators.
> ... the TT47 is equiped with a series governed motor.  the cycle (hz) rate
> did not atter as long as the
> govenor was set at 3600 rpm...  (tuneing fork or if you were lucky a
> strobe-o-scope)
> at 50hz though it did increase the importance of the monthly maintenance.
>
> the nomen tag shown looks as if this was a machine manufactured for or
> sold in Switzerland.
> (The "NOBsr-xxxxx" serial number  and the "xxxx:CTT" = Swiss Telegaph
> (Postoffice) asset number?)
>
>
>
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