Peavey VTM 60

[Guitarist]

I've read up on these but still can't solve the issue.

Preamp sounds OK but is humming. Going into effects return, guitar turns in a robot sound with a Univibe effect. Volts all look good. Speaker, which is main ground, was loose. I read some have rebuilt the PS board which I may have to do. Cap's lead were loose/cracked here prior. Swapped in good tubes everywhere. Main issue seems in the output section.
OT primary= 142Ω. OT sec= .9Ω

Any ideas?peavey-vtm-60,-120.pdf

I'm surprised by the amazing design Peavey did on this.
EDIT: The output heaters are now hard wired too. New PS caps ordered.

[Guitarist]

To update: parts came in and I rebuilt the power supply including the diodes with FREDS. Soldered in preamp filter caps onto preamp board + made a few tweaks.
Fired it up with light-bulb in series with AC cable and...it works! Very quite even with AC filaments (how?). Old caps felt very light and must've dried out completely causing no B+ reserves.

This amp kills and might just trump the Lee Jackson/ Ampeg VL of prior, wow Peavey 1987!

[Gtr_tech]

They do kill indeed. I bought one new in 1990. Still have it, but haven't used it in quite a few years. I need to dig it out and treat it to some fresh tubes.....

[Guitarist]

Does this amp have some sort of DC elevation on the filaments? I'm not sure what that extra circuit in the PS is about.

[Jazz P Bass]

Which "extra circuit"?
For the top of the schematic:
First transformer is for B+ Vdc.
Second transformer is for C- (-56Vdc) & LED status indicators.
Third transformer is for the heaters. (6.3Vac)

[Ronsonic]

Does this amp have some sort of DC elevation on the filaments? I'm not sure what that extra circuit in the PS is about.

There is a "hum balance" ckt, but not elevated fils. THe hum balance acts like an adjustable center reference. You know the two 100Rs on the back of a Fender pilot light? Like that but adjustable for minimum hum.