• 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.

Looking for Lo Mu Triode

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The short answer is no. Even if you did find a tube with those sort of specs, the design requirement are going to be ridiculous.

The GM100 was the first tube that jumped to mind, but it will require voltages well above 1KV, and the filament alone draws more than 200 watts a piece.
 
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