I think you will still need some dropping resistors added to equal the voltage drop of those tube rectifiers!
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The B+ has gone from 300V to 325V and from 290V to 315V at the OP valve plates, so as it is cathode biased I'm not too concerned. I'll put the tester inline with one of the OP valves and see what the plate and cathode current is to see if it's within limits. The EL84s were only doing about 10.5 Watts before.