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Electronics => Projects, Designs, and Technical Stuff => Topic started by: oz2cpu on April 01, 2022, 09:16:18 am

Title: 50 year old dual ch ac mV meter, used mirrored film for pcb, teardown
Post by: oz2cpu on April 01, 2022, 09:16:18 am
video link is here

https://youtu.be/6lmpMzdiLUU

Contain really cool mirrored PCB's so CH1 and CH2 are exactly identical but mirrored.
I found 68 written on the transformer, it looks like upside down,
but it can NOT be 89 since I got this unit from my father and he know for a sure he purchased it 1970-1975
one meter the coil needle bearing was loose, a little bit different tracking ch1 to ch2 depending on range,
so the range/gain resistors don't track perfectly.