Tube DIY Asylum

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Posted by sser2 on September 21, 2017 at 22:22:53:
the secondary's rated voltage is specified under full rated secondary current, with voltage drop in secondary's resistance and core loss factored in. As a result, turns ratio is not 1+1:1.04, but rather something like 1+1:1.35. That's why when turned backwards, the transformer puts out 91+91V.