[GreenKeys] Interesting modified teletype

[John Spigel]

Interesting stuff. Looks like the work predates 8 bit machines.
I remember years ago when bits and sometimes piles of the tube plugins 
of the old computers would show up surplus. I definitely was surprised 
that arrays of small CRTs were used as memory storage. It shows how 
clever you had to be to solve problems back then. And I wonder how much 
beer you had with colleagues to find those solutions and the lab 
experiments performed to verify and limit the risks. I'm sure it was a 
fun job. Military? Who has that story?
Should this history be preserved and part of the education for new IT 
professionals?

73, John W1AN

On 30-Mar-24 08:36, E. wrote:
> Man would I love to tear those apart to see how they work!
>
> …so that is - like John said, is a heavily modified M19 (the non-standard keys are really interesting too) with a standard-ish punch — missing the dial and all (but with other goods)… and then it feeds into that modified half-a 14TD (the verifier or whatever they call it… it has the front end of a 14TD, but not the innards on the back).  The tape then goes into what looks like a gutted M14 that has a (standard?) M19 tape punch on the inside (the duplicator)?
>
> Also interesting is that when they show the M19 from the side, it looks like they have a cut-out backdrop (where the tape goes), to hide whatever is behind the 19 (top secret maybe?).
>
> It does almost look like a standard M19 metal table, but again modified.  That half of a 14TD looks to be propped up on a piece of wood, so that the tape spool can sit in front of it (usually a standard 14TD would take up most of that space).
>
> Also curious is the piece of metal that skews towards the camera when the 19 is shown from the side.
>
>
>> On Mar 30, 2024, at 12:08 AM, John, W9DDD <w9ddd at tapr.org> wrote:
>>
>> Interesting,
>>
>> Heavily modified 19 keyboard punch (technically called "Model 15 Perforator Transmitter").  Looks like they're punching hexadecimal onto a 5 bit tape.   The character counter has some extra switches.
>>
>> Not a standard 14 TD (maybe MXD?) so not a 19 table per se. Looks to be 19 size, but without the 14tD base.
>>
>>
>> On 3/29/2024 11:17 PM, Paul Heller wrote:
>>> 
>>> About 8:30 in the video. Model 19?
>>>
>>> https://www.youtube.com/watch?v=aAVT4rZbcGE
>>>
>>> Paul
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