How to Test the Integrity of Tubes in a Tube Amp (The Wood Pencil Test)

Follow along as I test the integrity of my Amps’s tubes

[@fab-antonio]

Thanks for the tutorial.

[@mtbmadman011]

Let me get the popcorn going… this was entertaining… omg

[@FinalBaton]

Thanks for the tip and tutorial! This helped me quickly identify a microphonic tube at my (cramped) pratice place, without having to bring the amp to a tech.

[@warpold]

Glad to help

[@garyeggleton1142]

did replacing them take care of the volume drop? because microphonics and volume drop dont seem to be the same issue

[@garyeggleton1142]

that was the reverb driver so it would affect the tank

[@rtblues]

Um, VOLTMETER... JJs and Groove tubes? Ugh!