450+ plate volts from 360v source @ the rectifier???? 6v6 amp

[loosecounty]

I have a homebrew prototype amp I am working on And i am getting a lot of squelching sounds (heavey static on low notes also ) and one of my power tube plates is reading WAY high. This design is very roughly based on a 5y3 . One 6v6's plate is 350 ish' and the other one is all over the place and gets up to 450+v. I only have about 360 v b+ at the rectifier. I have rewired it several times and I keep getting the same thing. I move around the offending wire and the noise and heavey static gets better and worse BUT never completely goes away. I recently did a simimar build and had no problems but the chassis was 2" longer and the components were spread out more. I dont know if that has any thing to do with my problem ,just thought I would add it.
Magnetic components deluxe reverb PT
magnetic components tweed deluxe OT
Why Am I getting 450 volts when only 360 are avialable from th b+ supply?????

[MWJB]

What are the cathode voltages (not at the resistor, but at the tube socket pin) & screen voltages for the 6V6s?

Any pics of the build?

[lowell]

Also are you using global negative feedback? Have you tried a new pair of power tubes? New tubes aren't always 100% dependable, believe me I've experienced bad tubes that were brand stinkin' new.

[Enzo]

How about the tube that is making its own extra 100 volts is oscillating? Your meter is just averaging a high freq AC signal on the meter. SCope the circuit.

[loosecounty]

I think I may have it. I was running through some idea when I fired the amp up without the spaeaker jack totaly pluged in ( my fault) ....But durring the silence , I could hear the staticy squelching noise coming from the OT itself , so I think its a shorted OT. Would that explain the voltage thing? Funny thing is its come and gone before like this.