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i have a collection of old tubes to give away if anyone wants them like EF37,HL41,
25L6 + a few others which i will post the numbers shortly some are new but most are second hand but believed to be okay.
what would i need to measure impedance of transformers,i was led to believe it could be done by measuring the dc resistance + two thirds added,which gives the answer but don't know if that is correct.
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