[GreenKeys] tt333

[Nick England]

The TT-333 transmitter group is used in torn tape relay sites to feed 3 or
6 outgoing lines.
Each TD has an associated message numbering unit which automatically
inserts a channel ID and message number before each transmitted tape.
In 3- channel configuration, two TD units feed the same channel in
ping/pong fashion. So you can load a new tape into the lower one of a pair
while the upper one is transmitting and then at the end of the first one,
the second will automatically start, and so forth. There are relays that
control all the sequential operations.

I have created one of these units although I didn’t have a cabinet. You can
see a video of it in operation at
https://www.navy-radio.com/tty/28-transmitter.htm

The torn tape relay system description is here
https://www.navy-radio.com/manuals/tty/TT2-torn-tape-1962.pdf

The full torn-tape equipment tech manual is here
https://www.navy-radio.com/manuals/tty/275B-94158-01.pdf

Here’s a TT-333 installed aboard USS Midway.
https://www.navy-radio.com/ships/cv41-2/DSCN0110.JPG

I wish that surplus unit was located closer!

Nick England K4NYW
www.navy-radio.com


On Fri, Mar 7, 2025 at 12:17 AM Gerry Block <gblock at sbcglobal.net> wrote:

> Nick
> What is the TT333?  is it anything more than 6 abnormally heavy td's?
> gerry
> ad6mc
>
>
> Sent from my iPhone
>
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