SUPER CHAMP
®
XD
(This is the model name for warranty claims)
6
POWER SUPPLY
T1 has four secondary windings for the +5V regula-
tor, the +/-12V supplies, the tube filaments and the
high voltage supply. The violet winding is rectified
by a full wave bridge, filtered by C41 and fed to a
three terminal regulator to produce 5VDC for the
digital circuitry on the main PCB and fed to the
uDSP PCB where it is regulated to +3.3.VDC and
fed back on to the main PCB. Similarly, the center
tapped orange and yellow winding is rectified, fil-
tered and fed to +/-12V zeners to provide power to
the operational amplifiers and other circuitry. The
red windings provide the high voltage for the vac-
uum tubes. The green winding provides 6.3VAC for
the vacuum tube filaments. A voltage doubler is
employed to produce -41.9VDC to bias the output
tubes, V2 and V3.
.
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