This one has been a bit of a rabbit hole!
I built my own simplified version of Grant Wills' Baking Tray Tube Tester and have spent the last few months putting it through its paces in the workshop, including testing hundreds of guitar valves alongside my commercial testers.
I also built a free online app to go with it, which takes the actual HT voltage, grid bias and plate-current readings and turns them into a simple valve-health result.
The video is up now if you'd like to see how it works and how it compares with the commercial testers.
And as always, a massive thank you to all for supporting what I do. ❤️
Today's experiment was one of those projects I've wanted to try for a long time. [VIDEO LINK]
Rather than arguing about magnets online, I figured the best approach was to build a proper vintage-spec PAF and swap only the magnet. Everything else stayed exactly the same.
Whether the result surprised you or confirmed what you expected, I hope it shows why I enjoy doing these hands-on experiments so much!
I'd love to know what you heard in the comparison, and if you've got ideas for other experiments you'd like me to test, let me know below. There's always another rabbit hole to disappear down!
