Ceriatone Yeti 50W with 425V PT?

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Ceriatone Yeti 50W with 425V PT?

Post by stevehollx » Mon Nov 29, 2021 12:48 pm

I just got a Yeti 50w kit to build up. I have a ****** OT & PT from a 50w JMP build I never did. It was built to 425V.

Ceriatone lists the Yeti 502 V5 HV @ 407v. I've read people are building this amp with 475V or also seen people with B+ readings in the 500s, so now I am wondering if my PT will be underpowered for this amp. The layout diagram has 700V on the JTM45 PT, I think? (PT pins listed at 350-0-350.)

Is 425V enough? I assume the mod should hold up with stock JMP transformers, given the origin of the mod itself? Would I have enough flexibility to just reduce the voltage dropping resistors if I want to increase plate voltage and tighten the response up?

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Re: Ceriatone Yeti 50W with 425V PT?

Post by FourT6and2 » Sun Oct 02, 2022 12:54 am

The amp will work fine with 425v B+. But it will feel tighter and sound stronger with 480 or higher.

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