Installed ts 6v6 eg tweakr 15,weird hum

[bluesstrattone]

I installed 6v6 tung sol in my friends tweaker, now I get
An oscillating hum if that makes any sense. Moreso with gain.
Now I know the tweakers are cathode bias and don't need
Biasing, the ts from the tube store have a sticker that says
Bias point at 25, ok.
I connected my bias probe to them and each one was marking
45 mv, is that for both or each tube?
The main issue is that hum like a sine wave. Steady

 

[bluesstrattone]

I think it was receiving interference

 

[jamme61]

I think one of the power tubes is bad.

 

[bruce egnater]

Put the old tubes back in and see if it still hums.

 

[bluesstrattone]

thats the thing bruce,
the ruby 6v6s were shot, one of them looked like it had some white crap coming out of the plastic base, like dried up caulking around a sink. plus there was no sound at all. only 1 was lighting up.
plus i was using a bias probe from amp-head, that has a selector for tube 1 and tube 2 mv, and another switch for vP.
it would measure something like 45 for each tube, and cant remember the vP.
im thinking thats for both tubes though, right?