[GreenKeys] M15 How to disable unshift-on-space?

[drlegendre .]

As I previously mentioned, the machine seems largely un-tampered and that
includes the original Bell System base. The pair of 1/4" jacks (in the
'box' on the RH wall of the base) I mentioned in the previous post are
marked for polarity in the same orange paint stencil as the rest of the
markings inside of the base - they are definitely original.

I"m also vexed by the domestic type (screw-in) fuse holder on the base. In
the few photos I've seen of original units, this was a standard tubular
glass fuse - not the type which is used in a typical 1930's domestic fuse
box.

And while I'm at it, why does the circuit spec. a 6A fuse for a 1/40th HP
motor? 6A @ 117V is like 750W - and 1/40th HP is like... a tiny fraction of
that. How could a 6A fuse ever protect such a motor, even if it went into
10X overload?

On Fri, Sep 18, 2015 at 8:13 PM, Jim Haynes <jhhaynes at earthlink.net> wrote:

> On Fri, 18 Sep 2015, drlegendre . wrote:
>
> Btw, since I have you, is there any use for the connecting box in the base
>> of the Bell M15? It has two 1/4" F jacks marked 'std' and 'rev' polarity.
>> I
>> was expecting a pair of jacks, but marked for red / black or KB / TU
>> (typing
>> unit aka printer). Aren't these systems polarity-agnostic in any case?
>>
>
> The trouble is, we don't have the history or provenance of the machine.
>
> I think what you are talking about is the electrical service unit,
> attached to the back wall of the table on the inside, and having jacks
> and things like fuses and electric outlets.  Do the "std" and "rev"
> marks look like a factory job or something some ham might have done?
> I can imagine a ham wiring things so that the keyboard can give forward
> or reversed FSK shift
>
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