Biasing Information for Various Models:
Refer to diagram above for location of bias trimmers and test points
SEE WARNINGS IN SECTION 6 OF THIS MANUAL BEFORE BIASING!
Blackjack-21:
Set for .02 volts on each test point (20-Ma per tube Class-AB-1)
Full-House-50:
Set for .036 volts on each test point (36 ma per tube Class AB-1)
Wild Card 100:
Set for .036 volts on each test point (36 ma per tube Class AB-1)
PREAMP TUBES AND THEIR FUNCTIONS:
V-1
12AX7 (nearest to input jack). Main input preamp, first clean and overdrive preamp
(premium tube recommended)
V-2
12AX7 (middle tube) Overdrive only preamp.
V-3 12AT7 Phase inverter/driver tube
4.
FRONT PANEL CONTROLS, INPUTS & THEIR FUNCTIONS
Input Jack:
Input jack is a 1/4" phone plug, designed for 1-Meg impedance, guitar-level signal. This
input will readily accept pedals/effects without any loss in performance. Pedals/effects
input is also inserted to this input in series with your guitar.
Clean Gain Control:
The gain control sets the overall gain/volume for the amplifier in the clean (channel-1)
mode. Adjust to volume /tone taste.
High Control:
Adjust the high control to taste, it controls adjusts the high frequency spectrum of your
amplifier.
Mid Control:
Adjust the Mid control to taste, it controls adjusts the mid frequency spectrum of your
amplifier.
Low Control:
Adjust the Low control to taste, it adjusts the low frequency spectrum of your amplifier.