Greeting all, While searching for something else the other day, I came
across my diagram of a vacuum motor controller. Some years ago I asked
an electronics engineer friend to take apart one of the PPCo units and
"reverse engineer" it. It has independent forward and reroll speed
controls.

I built 30 or so of them without any failures. The schematic is
available free of charge, but any liability or damage as a result of
someone building a unit rests with the fabricator, not me.

I am going through my player stuff and am passing it on to someone else
who might use it. I'll keep looking for additional items, mostly free.

Cheers,
John McClelland

 [ Vacuum motor controller schematic
 [ https://www.mmdigest.com/Attachments/20/11/28/201128_214945_Vacuum%20mtr%20ctlr%20schematic.pdf