[GreenKeys] Parallel TTY

[John, W9DDD]

Jim, you made me look!

I've always assumed that the LARP on an ASR keyboard got the information 
mechanically just like a normal punch.  I didn't think about push bars 
and such not lining up.  The code reading contacts of 144710 mod kit 
sits under the contact box and will operate off the ends of the keyboard 
code bars.  Can't do that and also connect mechanically with a 
(re)perforator.  If you look at 4213WD for the LAK20 (28LA) keyboard, 
you'll see wiring for the code reading contacts, even a reference mote 
to the 144744 cable assy of the mod kit.

So punching tape on Delta ASR involved reading the code bars, going 
through a box with some rely logic that mixed keyboard with codamatic 
information, and inserted the special control holes in the extra tracks 
of the 8 bit LARP punch.

I'd wonder if the 144710 mode kit would work on a Mark III KSR keyboard. 
  the code bars look the the same in the drawings as those for the ASR, 
but the part numbers differ.

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The above comments or recommendations are SWAG. Use at your own risk.
John, W9DDD

On 4/1/2021 4:19 PM, Jim Haynes wrote:
> I can't be sure I saw one, but I think I might have seen a 28 keyboard
> with an added contact block for parallel output.  I don't see anything in
> the KSR parts book.  In the ASR parts book there is a picture of 144710
> code reading contacts modification kit.  Now that I think about it, I
> probably have one, in that the Delta Airlines ASR set uses a multi-magnet
> tape punch.
> 
>      ---
> 
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