Transformer primaries out of phase?

Wow. The build is actually beautiful to me. Neat wiring and attention to detail. It is the kind of thing could happen to anyone. I second the thought of using Nylon or other sturdy product. The responses were all spot on, and that really helps when you are trying to troubleshoot a basic flaw. I want to see more photos of this project. From what I already have seen, I would likely get some good ideas for a future build.
 
It's always good to learn something new. Maybe this is common knowledge, but I learned that surrounding a toroid with a ground is a bad idea.
I thought the small adjacent toroids were creating some competing magnetic fields and causing the problem, but that was not the case. When I disconnected them from the terminal block the problem persisted. But as soon as I removed the terminal block and bracket going across the top, the problem went away.
Go figure.
A common mistake! At least you now know👍
 
The build is actually beautiful to me
Thank you. I actually like the fabrication as much as the electronics. The chassis is an old 70's Kenwood receiver that I'm retrofitting with a modern PS, amp, and preamp. Space is tight so I have to be careful with the layout. This is my 3rd build like this, I love that era.
I'll post more pics as it slowly progresses.
 
It's always good to learn something new. Maybe this is common knowledge, but I learned that surrounding a toroid with a ground is a bad idea.
I thought the small adjacent toroids were creating some competing magnetic fields and causing the problem, but that was not the case. When I disconnected them from the terminal block the problem persisted. But as soon as I removed the terminal block and bracket going across the top, the problem went away.
Go figure.

Did you try to float the bracket so it wasn't connected to ground?

As is, it looks like it creates a current path to ground via inductive coupling, huh?