Tube Biasing? Explain Please

I'm new to tubes and would like to know what the terms "Biasing and rolling means in regards to tubes? thanks Darren

martice11-23-2000 2:52am

nex Details Discussions Posts This discussion Message User 13 posts 11-23-2000 at 12:29pm Copy Comment URL Report Comment Edit Delete How to do biasing?
mattman Details Discussions Posts This discussion Message User 61 posts 11-23-2000 at 04:05pm Copy Comment URL Report Comment Edit Delete It depends on your amp. The manual should have instructions on how to do it. My amp you have to take a reading on each individual tube with a multimeter then adjust the pots with a plastic screwdriver until they all read the same.
martice OP Details Discussions Posts This discussion Message User 103 posts 11-23-2000 at 08:52pm Copy Comment URL Report Comment Edit Delete What if your're using just a tubed pre amp? Is biasing necessary?
mattman Details Discussions Posts This discussion Message User 61 posts 11-24-2000 at 04:09am Copy Comment URL Report Comment Edit Delete I don't think so. You might have to buy matched pairs of tubes though.
vayasteve Details Discussions Posts This discussion Message User 171 posts 11-24-2000 at 05:23am Copy Comment URL Report Comment Edit Delete Tube preamps don't need biasing but power amps definitly do.If you have a Conrad Johnson they have red LEDs by each tube,you adjust accordinly.Some power amps are "Auto biasing" others you have to use a meter to bias.So have fun searching for that tube amp.Steve