Funkshun amp revisited

[jestaudio]

After doing a little research it appears on 50 of these were made and only 5 are know about, after giving it a general going over and sorting a few bits out fired it up on a limiter all looks good, voltages all close to the published specs, problem being low output, voltages around v4 are bang on, checking produces a substantial pop on the speaker,
I suspect the problem is within the preamp or around V3 which has got me a little puzzled as im not sure what is actually going on there, if someone could take a look at the schematic and enlighten me it would be appreciated

[jestaudio]

Ok, call me a muppet, looks like a cathode follower, put a tempory bypass in and the amp lives, sounds pretty decent as well.

[VacuumVoodoo]

Something doesn't compute. There's no way you can have 320V on V3a plate with 315V on top of R23. A quick napkin doodle says ca 200-230V. A typo on the schematic, me guesses.

[jestaudio]

Something doesn't compute. There's no way you can have 320V on V3a plate with 315V on top of R23. A quick napkin doodle says ca 200-230V. A typo on the schematic, me guesses.

I think the quoted voltages need to be taken with a large pinch of salt, I'm running about 20 volt above quoted most of the way across even allowing for having a full 240v and running the tap on 245v.

a quick look under the board shows the problem to be someone's attempt to change a valve base wrecking a fair bit of the traces on the pcb, I'll have a good look later and see if its worth repairing or simply bypass it and run as is