• 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.

A rare tube in my hands. Info please.

Hello,

I got my hands on, what it seems to be a rare tube of which I cannot find any information, even the socket type. Judging by the construction inside, it seems to be a mesh electrode voltage regulator tube. The socket is similar to the P8A, but 5 pin.

Thanks in advance.
 

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