• 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.

I found a great on/off switch for preamp

I came across this beauty on the net. Perfect look for my next preamp.


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I use those colored switch covers that are used as safety shields on stuff like nuclear missiles launchers! I got a bunch cheap but they were surplus and are long gone now. You can still find them retail. Look for spring loaded switch guards. They bring a mad scientist look to things.