3rd Power BRITISH DREAM MKII Benutzerhandbuch - Seite 11

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Operational Notes:

TUBE CHART

tube

rectifier

diode

rectifier

phase inverter

Tube Layout and Requirements:

V1: JJ EF806 (Preamp Pentode)

V2 and V3: JJ 12AX7 (Preamp)

V4: Sovtek 12AX7LPS (Phase Inverter)

V5 and V6: Mullard "Reissue" EL34 output tubes

V7 and V8: Rectiﬁer tube sockets (V7 loaded with Diode Adapter, V8 GZ34 Tube Rectiﬁer)

Bias Adjustment

Your BRITISH DREAM MKII 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 dan-

gerous high-voltage electricity that can kill you. Special test equipment and knowledge of amp cir-

cuits 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.

.5"

output

preamp