• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

opt for 45 tube

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I'm currently using opt from Jack Elliano's Electra Print for my 300B SE amp. I recommended it very highly. The sounds neutral and very tight and deep bass.
I believe Jack will give you reasonable price/performance and also reasonable shipping cost.

I never heard amp using James opt but many times I read the opt are highly regarded for the performance vs low price.
 
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