I have revised the Hot Tubes clone. As it turns out, there was a capacitor missing from the factory schematic and another capacitor has a much larger value in actual builds. According to several reports on Aron’s forum (electrobuster, Bernardduur), the changes improve the sound tremendously.
Here’s the text from my original post:
First ever: stobiepole and gaussmarkov teamed up for this one. It’s coming out of the blocks verified, with no hum or oscillation issues in stobiepole’s build (pictured above).
So now we need a new picture! 😉