[sdiy] combination actions on Organs, was presets on a modular

[Byron G. Jacquot]

> Significant correction -- on pretty much any modern (post-mid-18th
> century) organ, the combination actions work via a 'capture' mechanism
> which allows them to be pretty freely programmable.  Pull the stops
> you want, set the combination to that set via whatever mechanism was
> provided (you wouldn't *believe* the variability!!) and voila --
> user-set combinations.  Truly hellish to build before electronics
> became reliable (early middle 20th century). Imagine a mechanical
> action user-settable combination action...  Or a user-programmable
> crescendo pedal.

And lets not forget the presets on a Hammond organ.

There are rows of barrier strips inside, embossed with the numbers 1-
7,  which are wired to mimic the stop settings.

The first time we took the back off a friends C3, we saw the barrier 
strips, and hanging from them was a little fabric bag.  We figured it 
was someone's old Mojo, so we didn't fiddle with it.  Someone 
considerably more knowledgable filled us in: the little bag is full 
of extra screws for changing the presets!

Byron Jacquot