[GreenKeys] TTY hardware

[steve shumaker]

Thanks for all the info!  This is clearly on of the 6-TD devices shown 
in the photo.  It appears to be missing some of the misc exterior 
fittings but basic system seems intact and complete.

Steve

On 9/24/24 5:28 AM, Nick England wrote:
> 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 <http://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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