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Can I substitute different tube types for the 12AX7/ECC83s or 6L6GCs?
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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. Usage of other power tubes (ex – 6550s,
6L6GCs, modern 6V6s like Electro-Harmonix, JJ) may be possible, but please first consult Ceriatone
Amplification or your local competent amplifier technician.
What settings do you recommend?
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See Section 2, Page 3.
Do I need to use a matched and balanced phase inverter?
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It is not necessary. Feel free to experiment with different tubes (of the same type) in your Yeti, though!
I’ve read that the components used in this type of amplifier are really important. What is inside my Yeti?
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We use a combination of parts custom-made for us to our specifications (power transformer, output
transformer, choke, high-temperature / low-ESR electrolytic capacitors) and those used in our British series
(1/2W carbon composition resistors, 1W carbon film resistors, Mallory 150M polyester film capacitors, high-
voltage silver mica capacitors, Belton tube sockets, and Alpha potentiometers, Cliff jacks). Finally, we
occasionally use NOS components from our vast surplus parts collection in locations they work well and
complement the voicing or enhance the performance of the amplifier.