• 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.

KT150 curves by Sofia

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What's with all the wriggles and jumps in the curves?

Some are obviously due to a metering range change glitch due to defective or out of calibration shunts. Others look more like artifacts of a poor power supply.
 
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