[GreenKeys] Model 33 Progress

[drlegendre .]

Brad,

Which documents are you working from? There are a number of 33 docs
floating around, and you might benefit from a larger selection.

And yes, there are a number of caps associated with the TU and KB. Have you
spec'd out the PSU at all? Measured voltages, compared against spec, etc?

Again, I don't have any 33-specific exp. but from listening on this list,
it's clear that they have a much more complex (and failure-prone) PSU than
the earlier models. For example. the M15 KSR is pretty much all
electro-mech - I believe the whole system is AC, and if there are any caps,
they're on the motor**.

If it were my 33, I'd probably freshen up the PSU (new caps..) as a
matter-of-course, just to keep that crap out of my hair.

(**This is for basic 117V AC mains units, that don't require one of the
boat-anchor PSUs down inside the table).

On Mon, Nov 7, 2016 at 8:28 PM, Brad via GreenKeys <
greenkeys at mailman.qth.net> wrote:

> Sorry for asking this – I do have the manual in PDF but because it’s so
> large it causes my reader to delay 5-10 seconds each time I ‘turn’ a page.
> Definitely want to order printed copies I think!
>
>
>
> Question – is there a capacitor involved in any way with the typing
> unit/keyboard?  It feels to me like we have something where not enough
> power is being consistently delivered.  If I press a letter key and hold
> repeat long enough, eventually the printhead will start moving and typing
> (wrong) characters.  And the punch also starts punching out different
> codes, where before it was only punching the fourth hole in from the right,
> if at all.
>
>
>
> I’ve done my best to clean the contacts and associated pins/wires, but
> that hasn’t made a significant difference, although Line Feed is now
> working if I hit it enough times.
>
>
>
> Going to try to (painfully) flip my way through the PDF here and see if I
> can understand more about how it works.
>
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