"Joerg" bravely wrote to "All" (29 Dec 05 18:54:44)
--- on the heady topic of " 6v & 90v DC Power supply"

Jo From: Joerg
Jo Xref: core-easynews rec.radio.amateur.homebrew:90375
Jo sci.electronics.design:535390


Jo Hello Spehro,

In case of a Hammond organ it might since it has a speaker. Of course,
it's a tube amp but that is a whole other matter which alone could make
this thread balloon.

Don't some of them have rotating speakers?


Jo That was an accessory item, a Leslie speaker. A huge cabinet with a
Jo rotating speaker on slide contacts, motors, gears.

Later on the speaker didn't rotate. The speaker was mounted face up.
Covering the speaker was a rotating funnel with 2 output horns at the
apex. The dual rotating horns gave a strong Doppler Effect that was
hard to duplicate electronically. A belt turned the rotating funnel
which was driven by a variable speed motor under user control.

A*s*i*m*o*v