• 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.

Are all 9-pin sockets the same?

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Just wondering if all 9-pin sockets are the same on devices sold in the US? I found a tube adapter on ebay and hope it will fit my tubes. I am just getting started in an old tube amp project and learning how much I need to learn (and buy) to get going. I hope it is worth it. Any advise on tube sizes is much appreciated.
 
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