From c_schonberger@yahoo.com Thu Oct 02 20:50:27 2008
Subject:Re: Finally revealed, new tool replaces my Ulltramizer, deals with "shrill factor"

Well regarding the foldback point:
The highest tone wheel on any Hammond (as far as I know) is a sounding F#, no matter if you play an F# and it's the 9th (white 1') drawbar you pulled out  or if it is used as a "dissonant" drawbar on any other note: the highest tone will always that F#. If you have harmonic foldback - it will fall back to a G an octave below when you play the key half a step higher.
 
Christian