Exactly that waveform? That is highly suspicious, you should see the regular 120Hz sawtooth, not this distorted 60Hz.With just adding a load at the rectifier output to draw about 400mA I am getting the waveforms pictured at the OP.
Can you post a pic of your set-up?
I hope that more information is forthcoming, very soon.
A photo of the as-tested circuit is required.
I am wondering if the AC Mains input pair has any enclosed loop area, i.e. if it's not tightly twisted everywhere, or, if traces, if they are not extremely close together, everywhere. Same goes for secondary conductors going to rectifier bridge, and rectifier bridge to caps, and also for DC power/ground conductor pairs.
Leaving gaps between the conductors in any conductor pair that eventuially forms a loop makes what is called, in technical terms, an ANTENNA. And some seem to mostly transmit while others mostly receive. So minimize the geometric area enclosed by ALL (i.e. each) of them.
A photo of the as-tested circuit is required.
I am wondering if the AC Mains input pair has any enclosed loop area, i.e. if it's not tightly twisted everywhere, or, if traces, if they are not extremely close together, everywhere. Same goes for secondary conductors going to rectifier bridge, and rectifier bridge to caps, and also for DC power/ground conductor pairs.
Leaving gaps between the conductors in any conductor pair that eventuially forms a loop makes what is called, in technical terms, an ANTENNA. And some seem to mostly transmit while others mostly receive. So minimize the geometric area enclosed by ALL (i.e. each) of them.
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