Operational Notes; Bias Adjustment; Tube Replacement - 3rd Power BRITISH DREAM 112 COMBO & HEAD User Manual

Operational Notes:

TUBE CHART
V3 V2
V1 V4
Tube Layout and Requirements:
V1: JJ EF806 (Preamp Pentode)
V2 and V3: JJ 12AX7 (Preamp)
V4: Sovtek 12AX7LPS (Phase Inverter)
V4 and V5: Mullard "Reissue" EL34 output tubes

Bias Adjustment

Your BRITISH DREAM comes from the factory biased for EL34 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 QUALI-
FIED 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 volt-
age stored in the capacitors to give you a lethal electrical shock.
WARNING:
1) Do not remove the back panel.
2) Do not attempt to check or replace tubes yourself. Refer to an author-
ized service center.
3) Never touch the tubes while the amplifier is turned on or has recently
been turned ON. You can severely burn your fingers and hands.
V4
V5
13