Strange DC ripple

[The Master]

I specifically used 2 extra diodes to avoid any of the capacitance problems I'd have had using the same positive that supplies the regulator. In theory the main part of the circuit shouldn't interfere with the zero crossing part (not that much anyway).

The schematic I posted above is just a guide for what my circuit looks like. The scope readings were all taken from the test circuit which I've attached below. There's nothing that should interfere with it at all. This test circuit doesn't have any capacitors or regulators or anything, just diodes and now a resistor.

[AvionicsMaster1]

Just a couple of thoughts:
Do you get the same waveform when AC coupled as DC coupled?
How about changing channels on you scope. Same waveform?
How about trying a different probe?

It's doubling frequency so it appears the all your rectifiers are working but maybe change the location of two and see if waveform changes. Could be a bad one or two rectifier.

[richard]

cro1 as per test circuit

cro2 as per test circuit with diode in series with cro ground


looks the sams as per post 1

[AvionicsMaster1]

Not really. Bottom plot in post 12 looks almost normal. It's much more symmetrical than original plot but only slightly better than to plot in post 12.