• 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.

Does someone has info about this tubes ?

I wonder where the German Military used this tubes for...not for HiFi for sure...does someone has some info about ?
 

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