Ceriatone Dizzy 30, User Manual, Page: 13 / 16

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Can I substitute different tube types for the 12AX7/ECC83s or EF86?
- Although you can try 12AT7s, 12AU7s, 5751s without any harm, the design is optimized for 12AX7s, and are
therefore the only recommended tube in the preamp positions. No substitutions are permitted for the EF86
tube.
What settings do you recommend?
- NORMAL: Volume 10:00, Bass 8:00, Treble 10:00
- EF86: Volume 10:00, Tone position 3 or 4
- Power amp: Cut 10:00, Master to taste (but louder is always better J )
Do I need to use matched power tubes?
- Although not necessary, matched power tube sets are recommended for best results.
Do I need to use a matched and balanced phase inverter?
- It is not necessary. Feel free to experiment with different tubes (of the same type) in your OTS, though!
How do I bias my Dizzy 30?
- You don’t need to! The design is cathode-biased, Class A. The amplifier sets the bias point of the power
tubes, and there is no adjustable bias to worry about!