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Phil Allison[_2_] Phil Allison[_2_] is offline
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Default Output transformer ambiguity


"Steve Sousa"

I have a tube radio to repair. It's output valve is an ELL80 (two EL95 in
one tube) and was broken at the base and the socket showed signs of
overheat and cold solder joints. I have the valve on order but when
checking the output transformers (it has 2) onde of them has a primary
resistance of ~900ohm and the other ~4000 ohm.



** Assuming the transformers are the same size and do the same job, the one
with the 4000 ohm primary is stuffed.


I measured the turns ratio using a signal generator at 1khz and got 45,6
and 46,0



** Do not use a comma for the decimal point - it is way too confusing.



...... Phil