[GreenKeys] [External] Model 33 parts

[Gillian Webb]

I need to make a similar repair. Was considering using Sugru, or 3D
printing a new version of the broken off bit and epoxying it in.

Not sure when I will have time, but the 33 "Teletype" metal faceplate looks
easy enough to make out of an aluminum sheet and the printing something
that wouldn't be hard to clone with a laser cutter and some Cermark.

That stamped radius edge on the modem blanking plate would be a pain
though. I'd be inclined to mill it from bar stock and paint to spec if the
original paint can still be sourced, but that gets a bit more pricey.

- Gillian

On Fri, Jan 20, 2023, 11:34 AM Eric Moore <mooreericnyc at gmail.com> wrote:

> Thank you Doug, I have done repair on the plastic, replacing an earlier
> much worse repair by the previous owner, but there is missing material for
> the clips that makes it unable to sit correctly. Any suggestions on
> addressing that?
>
> On the plexi, let me take a look at your page, thank you! I was thrown off
> by the sharp edge on the plastic for cutting paper, but really it is not at
> all necassary.
>
> -Eric
>
> On Fri, Jan 20, 2023, 10:28 AM Jones, Douglas W <douglas-w-jones at uiowa.edu>
> wrote:
>
>> From:  Eric Moore [mooreericnyc at gmail.com] -- Friday, January 20, 2023
>> 8:31 AM
>>
>> > The top cover plastic has broken,
>>
>> Testors liquid plastic cement works on the plastic, making bonds just
>> about as strong as the original.  You can buy an ounce or so at any hobby
>> shop, and it only takes a few drops.  What takes time is setup.  You need
>> to clamp the broken pieces in the correct relationship to each other and
>> then use the brush applicator to run the solvent into the cracks --
>> capillary action will pull the solvent into the cracks.  Then let it sit
>> for a day so the solvent can evaporate.
>>
>> > and the clear window is badly cracked.
>>
>> Replace the window.  You can buy plexiglass (I bought a piece at an art
>> supply store).  I cut the tapered edge with a carpenter's plane (clamp the
>> plexiglass between pieces of wood pre-cut to the correct angle, then plane
>> the exposed edge.  The planed surface has a frosted surface, but brisk
>> scrubbing with a Mr Clean polishing pad made it crystal clear.
>>
>> My whole experience repairing a 33 cover is documented here (follow the
>> links for more detail):
>>
>> -- https://homepage.cs.uiowa.edu/~jones/pdp8/UI-8/bugs.shtml#17
>>
>>             Doug Jones
>>             jones at cs.uiowa.edu
>
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