[GreenKeys] Teletype Model 14, ASR 32, and Chadless Perforating

[Paul Birkel]

All:  I don't think that I'll be passing the Real Teletypers Test any time
soon (although 5-level code seems like it ought to be more approachable
than 8-level)!  That's what readers were built for ... but maybe not the
M32-ASR in this case.  Well, maybe someday I'll come across a suitable
reads-chadless-tape device ... so if anyone here has one that they'd like
to see relocated to keep my M14 company, then please do drop me a line :->.

Jim:  Regarding "Line Relay Option".  How does that work (just point me in
the right direction for self-education)?

All:  Is the best approach to cleaning the M14 mechanism a full
solvent-dunk (mineral spirits) followed by applicable re-oiling?  It
actually looks quite good but there's a lot of adherent surface dust along
with the gummy striker-travel areas that prevents smooth action.  Will keep
reading ...

Thanks.


On Sat, Sep 19, 2015 at 9:05 PM, Jim Haynes <jhhaynes at earthlink.net> wrote:

> No, I have no idea.  I guess the most important thing is that a 32 can
> read its own punched tapes, and you don't think of the 32 as a machine
> that would be used in a busy communication center where messages are
> being relayed by tape from one circuit to another, but I'm not aware
> that the 32/33 can't read chadless tape.  I don't see any thing in the
> tape reader principles of operation about chad or chadless tape.  I
> suppose it could be that the sensing pins don't push hard enough to
> reliably read chadless tape, if the "lids" should happen to be pushed down
> into the holes rather than being left open.
>
> I do recall that late typing reperforators (Model 35, I'm not sure about
> 28) were printing between feed holes on fully-perforated tape as an
> alternative to chadless.
>
> Of course Real Teletypers don't need none of them typing reperforators;
> they can read the tape by the holes.  I remember a small delegation of
> FAA people visiting Teletype to see a system being developed for them,
> and some of the older ones grumbling about printed chadless tape being
> too hard to read.
>
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