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Are there 9 leads coming out of the xfmr?
If so, what I would do is this - First identify the center-tapped hv secondary. It'll measure a few hundred ohms. That'll get 3 leads outa the way.
Then identify the 5V and 6V secondaries. Each will read very near zero ohms. Never mind which is which for now.
The remaining winding will be the Primary, and will read a few ohms. Put the juice to the Primary, and measure what voltages you're getting out of the secondaries. Careful - there can be 800 - 900 VAC on the hv secondary.
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