• 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.

Mystery Tube Time

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Evening

A friend gave me a few of these today in the vague belief that I may know what they are:confused:

Even Mr Google has turned up blank!

Any thoughts guys???

Cheers
 

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