SX-1250 ripple question?

[Marty R]

Hello all,
I’ve got an SX-1250 that I’m restoring. I just got done with the power supply and everything looks good. Sounds fantastic, putting out plenty of clean power, however, I did notice this odd waveform coming from the right channel rail when I was checking for ripple.
I’ve isolated it to the rectifier on the stabilizer board but cannot determine if this is normal or not. ( I think not)
I’m new to SX -1250 so kinda learning it as I go, everything seems super simple on this piece just not sure about what I’m seeing.

The other side has a perfect sawtooth this side has the extra hump.
Again everything is working as expected, offset =0 and bias=70mv rock solid, distortion normal.
Any thoughts?

 

[rcs16]

I have a awr-106 on the bench being burnt in, I'll scope it later today.
Was there a load on the power amp during this testing?
You have four power amp rectifiers in a sx-1250, two sets of + & -, di they all look the same on a scope?

 

[Marty R]

No load just at idle, get worse after the soft start kicks in.
I’m going to pull the rectifier double diodes tonight and check all the connections again.
I did swap the filter capacitors and amplifier left to right and everything is still pointing to the rectifier mounted on the stabilizer board.

 

[rcs16]

I looked at mine, it looks close to your pic, so imo it's not an issue.

 

[Marty R]

Thanks, if I find something off I’ll follow up.