Support HammondWiki. Donate!
PayPal

From the OriginalHammondLeslieFaq:

When developing the PRO-3, ?JohnFisher measured his Leslie147. He found that the top rotor had a rotation speed of 400 RPM on tremolo and 48 RPM on chorale. This was with the belt in the middle pulley position and with a normal belt tension. The lower drum rotated at about 342 RPM on tremolo and 40 RPM on chorale.

SalAzz reports the upper rotor speed (middle pulley) to be 409 rpm, and lower rotor speed to be 396 rpm. Chorale speed is 48-49 rpm, for both upper and lower rotors.

DanDillon states the obvious for those who are stuck with digital simulacrums of the real thing and can't do the math for themselves: the "chorale" speed is about .8 Hz, and the "tremolo" or "lush tibia" speed is 5.7 to 6.8Hz.

The content of this page is Copyright (C) 2000, 2001, 2002 Geoffrey T. Dairiki and the other authors of the content, whoever they may be.
This is free information and you are welcome redistribute it under certain conditions; see http://www.dairiki.org/HammondWiki/opl.html for details.
Absolutely no warrantee is made as to the correctness of the information on this page.