Can I do this?

[Chuck H]

That is to say, without fire?

Can I derive two independant +V sources from a center tapped HV secondary by using two bridge rectos ? One from each end to the CT. Eight diodes, Like one diamond (shape) next to the other, sharing the CT as a common HV winding end. Or do I need two separate HV windings?

I think I've seen it before. Would I need an extra diode from the CT to each bridge for isolation?

Thanks

Chuck

[Steve Conner]

No. That is to say, you can do it, but the resulting voltages won't be independent. Four of the diodes will be redundant, and the other four will form positive and negative FWCT rectifiers, or a single bridge rectifier, which is the same thing.

So if you had a 100-0-100V transformer, you'd get + and - 141V relative to the center tap, or if you grounded the bottom of the rectifier/capacitor stack, it'd be 141V and 282V. Any attempts to get voltages other than these by different connection schemes will let the smoke out.

[Chuck H]

Thanks Steve

I figured that would be the case. But I may be able to exploit your latter scenario.

Chuck

[Bruce / Mission Amps]

No. That is to say, you can do it, but the resulting voltages won't be independent. Four of the diodes will be redundant, and the other four will form positive and negative FWCT rectifiers, or a single bridge rectifier, which is the same thing.

So if you had a 100-0-100V transformer, you'd get + and - 141V relative to the center tap, or if you grounded the bottom of the rectifier/capacitor stack, it'd be 141V and 282V. Any attempts to get voltages other than these by different connection schemes will let the smoke out.

Hmmm... what if he were to feed the other rectifiers (regardless if it was wired and grounded for + or - DC) with AC from the PT with some large value, ...say .22uF to .33uF 1000v caps, to block any DC component?