Well, fired up my CTH last night without any sparks, but that was the only good news.
Did all the startup measurements and everything seemed fine, so hooked it up to a source and some old 600 ohm cans, Nothing!
No output at all! Spent hours verifying all the components, everything looks good, no solder bridges either, checked with a loupe.
Retook the measurements:
OG -> SG = 11.98v
OL -> SG = 11.97v
OR -> SG = 12.00v
TB+ -> SG = 98.8v
P1 -> SG = 77.9v
P6 -> SG = 78.v
P4 -> P5 = 6v
On turn on, Relay snatches at about 20 seconds.
I'm using a new 6DJ8 Amperex.
Not really sure where to look next, all my measurements thus far look pretty good?
It's gotta be a circuit unrelated to the ones I've already checked.