[sdiy] String synth (solina) and Hammond organ questions

[Steve Ridley]

> > HAMMOND:

> > But even without a leslie, from what I hear when I listen to some
> > hammond playing, the sound seems to be so alive, even single notes,
> > they seem to "breathe" somehow.

The ratios of the notes are set by the ratios of teeth on the gears, so they're imperfect.
The Electric Druid had a bit on is site which might help you with this.

http://electricdruid.net/technical-aspects-of-the-hammond-organ/


> The tonewheels are rigidly mounted to the shaft, and always have the same phase relationship. 

The driving gears are rigidly mounted to their shaft, but the tonewheels are mounted in pairs on separate short shafts and driven off bakelite gears by slipping clutch 
springs. I guess they may slip on start-up then mostly retain their phase relationship until you switch off. 

Steve