Hey everyone,
I have a power transformer with dual secundaries that I would like to use in a center tap configuration. (I may use the wrong terminology here, so read on and bear with me)
The only problem is that the wires from each winding both have the same colour. So I scoped them to see the phase.
I marked the phase "plus" with an X in my crude drawing.
This is where I get confused: is the way I connected them in my schematic the correct way, or is it wrong?
Thanks.
I have a power transformer with dual secundaries that I would like to use in a center tap configuration. (I may use the wrong terminology here, so read on and bear with me)
The only problem is that the wires from each winding both have the same colour. So I scoped them to see the phase.
I marked the phase "plus" with an X in my crude drawing.
This is where I get confused: is the way I connected them in my schematic the correct way, or is it wrong?
Thanks.
Last edited:
Looks good to me. All you need to do is to check that the two windings are wired in so-called series-aiding. That means that the output across the two rectifier plates equals the sum of the two winding voltages. If you get near zero voltage across the two plates of the tube, then simply reverse the connections on just one of the windings.
That drawing is wrong, the phases should add from end to end.
That's what I intended. If the voltages of the halves of the winding cancel each other out (are out of phase), then reverse the leads of just one winding so that the voltages are in phase and therefore add rather than subtract (cancel each other out). I think that some of those dual secondary xfmrs have phasing dots on them to facilitate getting that right.
Last edited:
if you get it wrong, you can measure 270vac from ground to both ends, but zero vac from end to end, that is the consequence of wrong phasing..