[sdiy] Hammond Vibrato Scanner

[Ingo Debus]

Am 01.01.2008 um 07:25 schrieb David Brown:

> Any else on this list tried anything with a vibrato scanner?  I'm  
> thinking that if I come up with a nice variable-speed DC motor  
> drive, I could drive a "Circle Machine" for the ultimate mechanical  
> module.

Yes, I did, with the scanner of my Parie organ. While the tone wheel  
generator in this organ is completely different from a Hammond, the  
scanner is very similar, probably it *is* a Hammond scanner.
I own this organ since the seventies. I always knew that by spinning  
the scanner slowly by hand it yields a very nice phaser-like sound,  
but only some years ago I builtt a small DC motor for the scanner  
into the organ. I also added a speed control (just a simple LM317  
voltage source controlled by a pot).

Ingo