Newbie's First Questions RCA TS 721 Restoration

[Yamamaya42]

this is the tube voltage chart from the SAMs for the RCA 630ts which is very close.

http://suzaku.live-evil.org/sound-volt.jpg

Ref V14 15 16

it's normal to see almost no voltage aside from heater on the 6AL5

the 6AT6 also seems OK, pin 7 may be lower than what is said, but mot likely not an issue.

what is WEIRD here is the 6K6GT,,
You should be only be seeing negative voltage on pin 5, if pins 3 & 4 are negative then something is VERY wrong, especially if you have a good strong +225 bias on the far side of that 1k power resistor feeding it.