[GreenKeys] Teletype 32 Paper Tape Reader Power Supply Circuit & a question about Baudot to ASCII

[Hugh Pyle]

The reader supply is very simple & probably dangerous :)
The automatic and manual versions are on the last two pages of this doc:
http://www.bitsavers.org/communications/teletype/33/Model33_schems.pdf

I have one of these in a box (untested) & could send it to you for the cost
of postage, if you like - send me mail off-list.
https://photos.app.goo.gl/dEyjHRGc3Jm3kS7d9



On Wed, Sep 16, 2020 at 3:44 PM GodOfCows <jacobdouglastupper at gmail.com>
wrote:

> My Model 32 doesn't have the external power supply to power it, does
> anyone know the circuit for the power supply? I've found diagrams but they
> leave values for the circuit fairly ambiguous.
>
> The unit looks like this:
> https://www.pdp8.net/asr33/pics/old_rdr_power.shtml?large
> This particular unit is the automatic paper tape reader power supply, I'm
> needing the manual paper tape reader power supply for the Model 32, I
> believe the manual power supply is the same for both 32 and 33 but I'm not
> sure. I found the diagram for the reader once before but I failed in saving
> it to pdf, I can't find it at all now. The diagram didn't have any values
> of resistors, capacitors and the like so it wouldn't have been the most
> helpful anyways.
>
> If anyone has the circuit and could send a picture (and values), I would
> be very greatful. Having the reader working would complete the unit, and
> gives a lot of life to it.
>
> Finally, I'm working on a Teletype 32 current loop to RS-232 that
> automatically translates baudot to ASCII with a microcontroller. It will
> have a 16-bit Addressable buffer, so it can communicate with a faster
> device. Before I go head over water I wanted to know if anyone knows if a
> project like this has been done before. I like tinkering but if the wheel
> is already there, why invent it again.
>
> Thank you for any responses.
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