Organ sound construction (non-Hammond)

[Hakan Eriksson <e5he@etek.chalmers.se>]

Hello!

Another of those non-Hammond questions, I'm afraid, but it does regard an organ
of some kind, at least!

I've got this old Swedish organ prototype (made by a company called Mustad or 
possibly Bergman (if that helps:-)). I do know it uses some kind of 
frequency dividing of twelve 'sine' waves to create its sound. Since there's 
something very wrong with it, I wonder - does anybody in the group know 
extactly 
how this frequency dividing usually is done? In general terms, of course...

The problem is that a couple of notes sound very disharmonic over the entire 
keyboard, except for the highest note of each, which is the original note, of 
course. If I turn the core of the inductor I can get a decent sound on the
corresponding note, but out of tune. It seems to me as if some capacitor value 
or something has drifted.

I would be grateful if anyone can help me on this...


Bye,
-- 
              (           Hakan Eriksson             )
              (        e5he@etek.chalmers.se         )
              (  Chalmers University of Technology   )
              (         Gothenburg, SWEDEN           )