[GreenKeys] TTY hardware

[Nick England]

Here’s a photo showing the 6-TD dual-bank setup.
https://www.navy-radio.com/tty/relay/relay-transmitter-1950-01.jpg

However the second bank may have just been used for a pre-punched message
number tape. Every outgoing message had to have a header with channel ID
and sequential message number.

The military AN/TGC-1 relay unit had three TDs, one for the header/number
tape and the other two for messages in ping-pong fashion.

Later Navy message transmitters used an electromechanical (or electronic)
header/number unit plus ping-pong TDs. These were arranged in groups of
three. Here’s one I have restored with videos showing operation.
https://www.navy-radio.com/tty/28-transmitter.htm

As you can tell I am fascinated by torn tape relay operation.
More info/photos at
https://www.navy-radio.com/tty-relay.htm

https://www.navy-radio.com/tty-relay-equip.htm

Nick England K4NYW
www.navy-radio.com


On Mon, Sep 23, 2024 at 10:54 PM Jim Haynes <jhhaynes at earthlink.net> wrote:

> On Mon, 23 Sep 2024, Nick England wrote:
>
> > Used in a tape relay center to transmit outgoing messages with each TD
> > connected to a line to a different destination.
> >
> It was also fairly common to have two TD heads feeding the same outgoing
> trunk, arranged so that only one at a time could transmit.  This allowed
> the sending operators to have at least two outgoing messages in queue
> for transmission without any need to attend to the machines once the
> tapes were loaded on.
> ---
>
>         "Ya can argue all ya wanna, but it's dif'rent than it was."
>         "No it ain't! No it ain't!  But ya gotta know the territory."
>                 Meredith Willson, The Music Man
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