VAC Avatar Super User Manual
Page 8
Page 8
OBTAINING THE BEST PERFORMANCE FROM AVATAR SUPER
Although surprisingly simple to use, Avatar Super is also remarkably versatile, and has been
outfitted with an assortment of useful features that enable it to excel in a broad range of
applications. Familiarity with these facilities will assure that Avatar Super performs
optimally in your system.
Output Tube Bias Adjustment:
Your Avatar Super has been shipped with the output tube bias properly set. Nonetheless, it
should be checked when you install your amplifier and approximately once every month
thereafter. It must also be adjusted each time a tube is replaced.
Allow the amplifier to reach normal operating temperature (about ten minutes of warmup
should be sufficient). Mute the amplifier and remove the small, gold-handled access panel
(located below the bias meter) from the front of the unit. You will see a four pairs of buttons
and knobs, each pair of which corresponds to one of the four KT88 output tubes (V10-V13,
respectively). Press the button for V10 and observe the bias meter. Rotate the knob directly
above and to the right of the button until the needle is centered on the small black dot near
the top of the meter. Repeat for V11, V12 and V13, and then, because the adjustments can
interact slightly, recheck all four tubes, starting once again with V10.