Hey guys. I know alot of guys "look down" on the V-series of crate amps,but i got a "sweet" deal on a brand new in the box V-33H...and the stock "Soveteks" has gotta go! lol!(got plenty of "N.O.S" EL34's&12AX7's.) The booklet that came with it stated that with a "re-tube",the power valves needs to be biased...but i always thought that EL34's were "cathode-based" valve,and did not need biasing. So what gives here???