• 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.

Isco 494

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I got rid of mine years ago, and no longer have the documentation that came with it. Studying the schematics carefully should reveal whether or not standard U.S. versions can be converted or not. Probably just simplest to get an autotransformer and run it on 120V.
 
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