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Old 30th May 2019, 8:33 pm   #27
cheerfulcharlie
Heptode
 
Join Date: May 2009
Location: Birmingham, West Midlands, UK.
Posts: 708
Default Re: Bell and Howell TQII 1652 16mm projector

Not sure if something like this might help?

https://tinyurl.com/y3pyvqxj

and presumably, you could replace the pot with the tacho circuit?..but I may be talking nonsense?
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