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 Calibration & schematic information needed: Seco 107C tube tester

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Posts : 16
Join date : 2010-10-12

PostSubject: Calibration & schematic information needed: Seco 107C tube tester   Wed Oct 20, 2010 4:28 pm

My trusty old SECO 107C tube tester was due for a re-cap & new resistors, since the old ones were way out of tolerance.

Sadly, I have no calibration instructions for this tube tester I bought new nack int he early 70's.
The schematic I have is so tine it is unreadable, even after trying to blow it up on the copier.

Does anyone have the calibration and legiable schematic info for this unit?
There are 2 pots on a PC board attached to the meter that I have no idea of what they do.

( I know this really belongs in the Test Equipment section, but since it is not here on this server this is where I thought it should go. Moderator- feel free to move if you want)

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