Operational Notes; Bias Adjustment; Tube Replacement - 3rd Power Wooly Coats Spanky MKII User Manual

Operational Notes:

TUBE CHART
V4 V3 V2 V1
V7 V6 V5
Tube Layout and Requirements:
V1 and V2: JJ 12AX7 (Preamp)
V3 and V4: Sovtek 12AX7LPS (Reverb and Phase Inverter)
V5 and V6: JJ 6V6 output tubes
V7: JJ 5AR4 Rectifier tube

Bias Adjustment

Your Wooly Coats Spanky Amp comes from the factory biased at 24ma idle current for JJ 6V6 tubes.
Bias adjustments are not intended to be user-serviceable. Attempting to adjust the bias yourself will
expose you to very dangerous high-voltage electricity that can kill you. Special test equipment and
knowledge of amp circuits and tubes are required to perform this function. DO NOT ATTEMPT TO DO
THIS YOURSELF.

Tube Replacement

WE RECOMMEND TAKING YOUR AMPLIFIER TO A QUALIFIED TECHNICIAN FOR SERVICING YOUR
TUBES. Make certain the amplifier is turned off and has been allowed ample time to cool down. Be
very careful when you remove the tubes as they might still be very hot! Do not touch tube sockets
with fingers! Even after turning your amp off and unplugging it from the power outlet there could be
enough voltage stored in the capacitors to give you a lethal electrical shock.
WARNING:
• Do not remove the back panel.
• Do not attempt to check or replace tubes yourself. Refer to an authorized service center.
• Never touch the tubes while the amplifier is turned on or has recently been turned ON. You can
severely burn your fingers and hands.
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