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R25 smokes in tse 300b

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My TSE sat Idle for some years because I was having issues with it and and only now getting back to get it running again.

this TSE is setup for 300b tubes.

I powered up with just a rectifier.

b+ 440
b- -175

After some a few min. R25 smokes. I replaced R25 and R14.

Figured I should start out with the proper checkout steps.

Filament voltages were 4.95 each
again b+ 440, b- -175
Grid of right output tube is -58
Grid of left output tube is +350 and slowly climbing

With rectifier in after a few min. r25 starts to smoke again.

I measured across r25 and getting over 600 volts.

So, where do I go from here?
 
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