Tube Complement and Bias Setting
A set of three matched Groove Tubes 12AX7 preamp tubes and two matched Groove Tubes EL84 power tubes, graded according to Fender's specifications, are used in all factory Blues Juniors. The Blues Junior uses a "fixed" fixed-power tube bias (no way to vary the bias point), but it's pretty "hot" and can accommodate most matched pairs you can buy. Most pairs wont last though -they run hot- so a common mod is to add a bias trim to be able to adjust the idle current when switching tubes.
Read more about this topic: Fender Blues Junior
Famous quotes containing the words tube, complement, bias and/or setting:
“The last best hope of earth, two trillion dollars in debt, is spinning out of control, and all we can do is stare at a flickering cathode-ray tube as Ollie “answers” questions on TV while the press, resolutely irrelevant as ever, asks politicians if they have committed adultery. From V-J Day 1945 to this has been, my fellow countrymen, a perfect nightmare.”
—Gore Vidal (b. 1925)
“A healthy man, indeed, is the complement of the seasons, and in winter, summer is in his heart.”
—Henry David Thoreau (1817–1862)
“The solar system has no anxiety about its reputation, and the credit of truth and honesty is as safe; nor have I any fear that a skeptical bias can be given by leaning hard on the sides of fate, of practical power, or of trade, which the doctrine of Faith cannot down-weigh.”
—Ralph Waldo Emerson (1803–1882)
“The world is ... the natural setting of, and field for, all my thoughts and all my explicit perceptions. Truth does not “inhabit” only “the inner man,” or more accurately, there is no inner man, man is in the world, and only in the world does he know himself.”
—Maurice Merleau-Ponty (1907–1961)