What is tube biasing?

[bigmack209]

Re: What is tube biasing?

central valley, california. near stockton
don't know how old the tubes are but they're sovtek crap and i'm replacing them with JJ's

[zzmoore]

Re: What is tube biasing?

From the Schem posted it looks like you have dual bias isjust....one for each tube that is.
And, as a member already mentioned, they are 10 turn pots. Not sure why, guess it will be apparent when you set the bias.
Speaking of bias, this is not something you are going to be able to do, by yourself, on the first try. You need a decent meter, and know how to split the OT and measure the plate voltage and resistance. I=E/R.
Either that or you need to install some 1 Ohm cat resistors. But them you still need a meter, take some measurements, do the math, and turn the pots.
If you do not have some mechanical aptitude and desire, you will need a tech.
Best