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Tube locations are indicated by the V (Valve) listing below. All tubes are factory selected for superior
performance, consistent tone quality, and reliability. While substituting other brands may not cause damage
to the amplifier this may affect amplifier performance in unpredictable ways. For best performance, replace
only with factory recommended tubes.
Warning!
Substituting other tube types is not recommended.
Warning!
This amp operates with fixed bias. If the output tubes are changed, the bias MUST be set to
operate with the new tubes. Failure to properly set bias WILL affect tone, may ruin your new tubes, or
DAMAGE your amplifier. If you do not know how to adjust output tube bias please take your amp to a
qualified tube amp technician. We recommend setting the bias between 50% and 70% of maximum plate
dissipation by monitoring cathode current.
Factory recommended tubes are listed under each location. Numbering sequence is left to right looking at
back
of amp
starting with V1 to the far left side.
V1
(shielded tube) - JJ/Tesla ECC83S (12AX7), Clean Channel
V2 (shielded tube) - JJ/Tesla ECC83S (12AX7), OD Channel
V3 (shielded tube) - JJ/Tesla ECC83S (12AX7), Phase Inverter
V4-V7 – JJ/Tesla 6V6S – Output Power Tubes
USE ONLY JJ/TESLA 6V6S Output Tubes. Plate voltage in the Rick Derringer HyperDrive exceeds the
maximum design rating of NOS and other 6V6 tubes. THE OUTPUT TUBES ARE NOT
INTERCHANGEABLE WITH ANY OTHER TUBE TYPES!
A FEW SETTINGS TO GET STARTED
CLASSIC ROCK MODE
A good starting point for great 70’s/80s style Rock
JAZZ FUSION
A good starting point for a clean spanky tone to a thick fat Overdrive tone
HEAVY METAL
Enter Heavy Metal Land. Go from AC/DC type tones on the clean channel to an over the top feedback on demand tone.
Also great for you Eddie Van Halen type tones.
