Three wire twist for filaments?

[soundguruman]

There's another trick too. I've seen it on some Mesa products (your favorites ) as well as others. You tack a few inches of unterminated lead to one of the filament leads in the preamp then move it around and trim it until you find a location that phase cancels the most hum/noise. Then tack the lead in place right there. I thought that was pretty clever when I saw it. I wonder if Randall has a patent

I was just doing that on a Vox.
I didn't think anybody did that except me hahahahahahah.
That's deranged.