winding resistance mk opt

Dynaco-Doctor Forum

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I'm rebuilding a pair of Mk 3's. The primary output transformer wires are very faded, so I took out my ohm meter to identify which is which .
I get 22 ohms from the center tap to each screen wire. I get 200 ohms across the two plate wires. But I get 128 ohms from one plate to the center tap and 72 from the other plate to the center tap. Resistance readings to the chassis are infinite.

When I placed a 1000 hz signal to the center tap and ground, the two plate wires measured the same.

Seems to me if I had a winding to winding short, it would show at 1000 hz just as it would in resistance.

I'm stumped.

Any suggestions?

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Topic - winding resistance mk opt - altecboy 03:55:17 07/21/13 (2)

RE: winding resistance mk opt - rlr274 10:29:57 07/23/13 (1)

RE: winding resistance mk opt - altecboy 12:40:52 07/23/13 (0)

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