Two-Rock Studio Signature, Owner'S Manual

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Fuse Chart
*All Fuses are 3AG Type 250 Volt, SLO-BLO
Export 100 Volt Domestic Fuses 120V Export 220, 230, 240 Fuses
2A – 35 Watt 2A – 35 Watt 1A-35 Watt
Tube Complement
Each fine production tube is tested and matched to our exacting specifications. External bias
adjustment and test points are located on the chassis near the output tube sockets. A digital multi-
meter and small screwdriver are required for bias adjustment.
BIAS ADJUSTMENT PROCEDURE:
-Power up unit and connect proper speaker load
-DO NOT have an instrument connected to the input during the biasing procedure!
-Take unit off standby and allow a few seconds for the circuit to stabilize.
-Set multi-meter to read DC Volts
-With meter grounded to chassis and + probe inserted into test point, measure voltage.
-Using a small flat head screwdriver, insert into Bias pot and turn slowly adjusting Bias level
This amplifier was built for 6L6WGC short-bottle power tubes.
*Bias ranges are measured and set in volts
*Do not set bias higher then recommend levels as it can lead to tube failure possible damage to other components in the
amplifier!
Factory Bias Setting: .030V
WARNING!
No user serviceable parts inside! Refer to qualified service person only.
LINE CORD- For your safety, connect to grounded A/C receptacle only.
V1
V2 V3
V4
V5 V6
V7
BIAS Pot
TEST POINT
V1 - 12AX7 - Input and Gain
V2 - 12AX7 - Reverb Send & Return
V3 - 12AT7 - Reverb Drive
V4 - 12AX7 - Effects buffer & Mixing Stage
V5 - 12AX7 - Phase Inverter
V6-V7 - 6L6