Rebel 30 Tube biasing.

[Gregflounder]

I was biasing the tubes in my rebel 30. The 84 were slightly low about 30 so I got them up to 40 just right. But the 6v6’s were at 12 and I maxed out the pot to get them up to 34.6mv is this a tube issue or something else?

 

[Gregflounder]

I thought this was the place to get answers. Guess not, I figured it out myself.

 

[thickwood]

That happened to me changing to jj el844 pair of tubes which are slightly lower power 9 watts each instead of 12 watts and could not run them !
Different tubes could be high demand or low but too high unable to achive bias point is not good !