Just get a bias probe and put the tube in it. Take the amp out of the head-shell there is a small plastic bias adjustment screw the you turn to
your desired bias range I run about 32-34 on SED EL34's. You will need a multi meter as well. Should take a bout 20 min for the first adjustment.
Keep it running for 30 min to an hour to see if it drifts out of bias and your done.
Where on the inside is the bias adjustment screw? I guess I shpuld have been more specific. I am familiar with the process of biasing on other heads, I just cannpt find where to make the adjustments on my rev 2.