That is an interesting roll frame.
Johnson organs used some thing like that in the 1970's, not sure if they are still using it.
I wonder how they controlled the speed (tempo).
On the Johnson organ frame they used a single drive motor, for both play and rewind. With their design one could not vary the tempo. (at least I do not know how to do it)
It would be a rather simple roll frame to build.
Does any one still make 125 tracker bars? Not sure how to get the square holes with out had filing.
Dan Danko
--- On Sat, 7/4/09, Jay Caughron <jaycaughron@...> wrote:
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