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Help identify old Noble Pot pins

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Datenshi

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Hi i can't seem to find which pins I'm suppose to connect to on this old Noble Pot i found on some casette tape recorder from like the 80's. It was connected with 3 wires but has 4 legs, one wasn't used(the 2 next to 3 on pic).

**broken link removed**


Multimeter Measurements: 50k pot / 200k on MM : with pot in middle
1+3 = 43.8
1+2 = 08.3
2+3 = 37.2
2+2 = 0.00
 

With a dead short between 2a & 2b, I expect it's a common
wiper connection with 1 & 3 being the ends.
 

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