Another Fender on the bench.

[Netlist]

Looking at the schematic: http://www1.korksoft.com/~schem/fenderamps/twin_reverb_sf_100_schem.pdf at V5A, V5B I measure some strange values.
1) 364
2) –39.5
3) 0

6) 309
7) -39.5
8) 0

I measured all resistors surrounding the tube and replaced it with the 7025’s. I tried several of them, V1, V2, V4, same result.
The only cap I changed was the 5 uF at pin 8, with a 4.7µF.
What could be wrong?

Thanks

 

[Netlist]

Sorry, wrong schematic: It should be the 135W.
http://www1.korksoft.com/~schem/fenderamps/twin_reverb_sf_135_schem.pdf

So why is the 1.8V and the 12V missing on both cathodes?

 

[SHiFTY]

Sounds like the tube is not drawing any current, has it lost the ground connection or the cathode resistors gone bad?

 

[Netlist]

Thanks, I forgot to connect the vibrato pedal. When on, the tube turns on as well.