Tube Tapper Bias Tool

thingiverse

The tube tapper bias tool is used for vacuum tube (valve) audio circuit repair but it could be valuable in any electronics repair. A chopstick is typically used to diagnose microphonic tubes and bad solder joints in audio amplifiers. This is my chopstick replacement. There is a slotted screwdriver end for turning bias pots and other trim pots. I used to have a tool just like this, it came from a TV repair place that I bought a lot of components and test equipment from when they went out of business. It was non-conductive and had a blunt end for tap testing components, and a flathead for turning trim pots. I believe it was a projection screen tv adjustment tool. In a recent move I misplaced my tool. So I drew this up quick and I'm happy with the results. Its very close to the one I misplaced. It scales well. I printed one at 125% in the Y and Z and its just a touch smaller than a pencil.