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Bolex MST Motor 7-pin hot wire... ground wire?


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#1 Steve Goodloe

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Posted 01 March 2007 - 03:43 PM

I have a Bolex MST motor. I am trying to rig it so it can run off the same battery belt that my SR-1 Runs off of, it is a 12v battery belt so i think it will work. However, i cant figure out what pin is the hot and what one is the ground. I have the old Bolex battery but it doesnt work. I tried the Red for Hot and black for ground but that didn't seem to work. Any ideas?
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#2 Clive Tobin

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Posted 01 March 2007 - 08:41 PM

...i cant figure out what pin is the hot and what one is the ground. ...


With the 7-pin Tuchel:
Pin 5 is + (might be red)
Pin 2 is -- (might be blue)
Pins 1. 3 and 4 go to relay contacts so you can select externally between "12v dc during clapper" and "pilot interrupted during clapper." (Pin 3 is switched -- and ground, 1 & 4 are relay contacts.)
Pins 6 and 7 are pilot (might be white and green-yellow) (Pin 6 often grounded)

With the 6-pin Tuchel:
Pins 1 & 2 are +
Pins 4 & 5 are --
Pin 3 pilot ground
Pin 6 pilot signal after clapper (Used with the old Nagra III SLO resolver to make a start beep while there was no pilot signal, while playing back the tape.)
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