[GreenKeys] Model 33 parts

[Eric Moore]

I have a blackbox 20ma current loop adapter. I picked it up for my 33, and
did not end up needing it. I assume 60ma current loop for my 14 would make
the adapter unhappy.

I have some relays and an arduino I can press into service, let me take a
look...

-Eric


On Fri, Jan 20, 2023, 2:08 PM Jeffrey Golas <jeffg at junknet.net> wrote:

> For keying a loop, keep your eye on Ebay for a RTTY terminal unit (thats
> not army/navy grade (sorry Nick!)). The other easier thing is if youre good
> with arduinos, Ive had luck using a relay shield and the code from Hackaday.
>
> There used to be some cool interfaces unfortunately the chips they used
> went obsolete due to lack of support for 45.5 baud.
>
> There IS a blackbox rs-232 to loop adapter thats rated for 20ma but youd
> have to ensure the data youre sending is 5-bit baudot. One of these days
> Ill find the one I bought and test it out. (There is also a blackbox device
> called a "cap" that adapts ascii to baudot (or vice versa) that could be
> paired to it.
>
> For your 33 thats easier; deramp.con has a serial adapter that fits right
> into the 33.
>
> Jeff
>
>
> > On Jan 20, 2023, at 10:19 AM, Eric Moore <mooreericnyc at gmail.com> wrote:
> >
> > 
> > Hi everyone, I have model 33s. One is largely non-operational but the
> electronics in the pedestal are an essential working part of a 60s computer
> system, so I am keeping it intact for historical purposes.
> >
> > The other, I have fully repaired, but has some cosmetic issues. The top
> cover plastic has broken, and the clear window is badly cracked. Also, the
> working teletype had a modem in it, and the right, normally blank metal
> panel, the ink is damaged and buttons are missing.
> >
> > Does anyone have, from a parts machine:
> >
> > 1) model 33 partly clear hinged cover piece
> > 2) model 33 right blank beige metal piece
> >
> > I am also down one teletype logo piece from the front of a 33, but I
> expect no one has spares of that...
> >
> > Also, I still owe $27 for paper to a greenkeyer, I have not forgotten!
> Just have to remember to slip it in the mail :)
> >
> > Thanks all,
> >
> > -Eric
> >
> > P.S. I also have a model 14 teletype. It is missing some of the green
> key covers, and I need something to key the loop that can handle 120V 60ma.
> If anyone has anything for sell or suggestions for converting to RS232, I
> would love ideas, most options are a bit pricey. I have a loop supply I
> think will work, just need some power caps.
> >
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