[sdiy] Tonewheel questions

[Ingo Debus]

Am Freitag, 28.05.04 um 10:43 Uhr schrieb Ken Stone:

> For a simple way to experiment, take a look at old video players. In a 
> lot
> of them you will find some kind of feedback mechanism on the capstan 
> motor
> or video drum motor. These sometimes take the physical structure of a 
> tone
> wheel.
>

That's a great idea. I once ripped a video drum (that thing the 
rotating heads are mounted on) apart, and it contained a ring shaped 
magnet. This magnet was polarized in a way that there were many north- 
and south-poles around its circumference. This would make a tonewheel 
that is already magnetized, you just could use a coil as pickup. Hmmm, 
there were even some coils already in it, these and the magnet were the 
motor.

Ingo (imagining a tone wheel generator made of 96 video drums)