V1 weird voltages in a vintage Ampeg SVT

[boroman]

You seem to be jumping back and forth. Start at the output and work back, fixing the issue(s) as you go. Be concise and post accurate readings stating the conditions used to get your readings; no signal, mains voltage is etc etc.
In my experience, there was only one issue to start with, anymore are man made.

Sorry, this amp is a Katrina-rescue. I trying to fix it in my free time since this spring (abandoned project in the summer but got back to it now). There were a lot of different problems with this amp. Inlcuding firework caps, electrical paths melted etc. Some pots needed to be replaced, and of course a lof of other stuff, resistors, wiring, molex, groudning problems etc. I am happy to be in a place where I actually see a finish line!

The 6C4 was not even glowing.

Sorry for my lack of pro language. by "no voltage" I meant close to zero voltage, like 0,05V or less. Same like my carpet or my hand are measuring :-) LEt's call it zero then!

[Helmholtz]

You're stretching our patience with our jumping around.
If the 6C4 is not heating, cathode voltage must be zero.
If the heater voltage at the tube socket is good, pull the tube and measure resistance between heater pins.