From bgvocals@yahoo.com Sun Nov 20 12:13:34 2005
Subject:Real tone wheels

I am interested in studying the whole cloning process by examining the original Hammond tone wheel. I know it is a rotating wheel (metal I guess) that has a magnetic coil pickup. Does anybody have any good photos of a real tone wheel? I don't think I have ever seen one. I have seen some pages where there are hand-drawn pictures. Is there a separate tone wheel for each note on the keyboard?

Secondly, I can see how a tone is generated using a spinning wheel, but I do not see where the drawbars come into effect with the tone wheels. I know they change the sound, but how is that done? Why are the drawbars labeled after pipe organ tube lengths? I realize I am asking electrical engineering questions, but that is what I am. So if there are any other EEs out there, please fill me in.

I have downloaded some schematics on the Hammond B-3 and have looked at them a little. It might be nice to have a tutorial to go along with them :-) Thanks.

Lou



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