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No problem identifying the filament wires (greens), rectifier wires(yellows), and HV out wires (reds), but there are three primary wires. Black, black/red, and black/yellow. What's up with that and how do you wire it? Came out of an old organ. Only code on the trafo is C512-41.
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If you read continuity from the black to the other two black leads, you can figure out if this is a 120/220 or 100/120 primary. I assume these are the two most common transformer primaries.
If one lead is like a center tap, equally apart from two other leads resistance wise, then 120/220. If center lead is much closer in resistance to one end or the other 100/120.
What sort of resistance readings do you get from the black to the other two leads? -
Check DC continuity between the three unkown leads. If they all conduct then apply a small AC voltage to two of them. With the multimeter on one of the leads, measure AC voltage between that and the other two.
Normally the 110V half of the winding will be thicker wire, so DC resistance will be different between the two halves, sometimes a lot different, so the AC test is the only way to know for sure. It is likely a 110/220 primary and one of those leads is the 110 end which should be your common.Comment
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Excellent. Thanks guys.Comment
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