A fruitfull evening

[Pete Lancashire]

For replacement 33 parts, join the greenkeys list. Greenkeys is a slang
name for Teletypes, When the went to the newer style keycaps in the 40's or
maybe the 50's the color was green. A member had a injection mold made and
a run of the hammer buttons made. He has also made or is making other 33
parts.

A quick solution is to use a piece of PVC tubing. Works pretty well.



On Tue, Apr 12, 2016 at 12:55 PM, E. Groenenberg <ed at groenenberg.net> wrote:

>
> So after cleaning up and reorganizing my computer/hobby room I thought it
> was time to get the asr33 working again. It has a stuck carriage (at the
> right end), and it would only go back after repeated CR's.
>
> First thing I did was to replace the gooed up rubber hammer, only to
> find out that my replacements were also starting to deteriorate :(
> (but still stiff enough to be usable for some print test).
> I can either use a piece of hose or one of those little self adhesive
> rubber feet.
>
> Closer inspection showed that the pawl of the advancing/return section
> was barely moving. With the application of WD40 using a small brush
> loosened the gummed up oil/grease and with some more cleaning and light
> machine oil it was behaving as it should.
>
> Next was to get it working as a console (it works fine in local mode,
> puncher and reader do what they need to do).
> I have one of these DLV11-KB's (EIA/20mA converters), and one of them
> was already configured for teletype use. The schematic also notes that
> these can be used for ASR-33 use.
>
> A flat mate-n-lok plug was made for the 20mA side, as well as a rs232 cable
> for the EIA side. Little note here is that the DLV11-KB uses 12V as power,
> so 2 wires were used to go to a wall wart adapter counter plug.
>
> Check power -> ok
> Check cables -> ok.
> Set VT220 to 7E2, 110 baud -> ok
> power on ASR -> ok
>
> Hmm, the print-head is constantly hopping and typed chars on the VT
> do not appear. Then again typed chars on the ASR do show on the VT screen.
>
> Ok, power off the ASR, and look at the back of the ASR terminal strip.
> Ahh, wire 6 & 7 are used other way around, so swapping 2 pins on the
> mate-n-lok is all what is needed.
>
> Power on ASR -> ok, no hopping print-head this time, and chars type on
> the VT do print on the ASR. Jippy!
>
> Only thing what does not work yet is that the paper reader does not start
> when I flip the switch to the 'start' position (it is a 3 position switch).
> Any ideas how to make this work?
>
> All in all a few hours well spend.
>
> Ed
> --
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>
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