SOLA SOUND: Hybrid MKI Tone Bender

MKI hybrid v1 db59224471a7

I’ve had a couple of questions about these recently, and out of curiosity I decided to take a closer look.  In 2024, Sola Sound released a few versions of a hybrid MKI, built by Dave Main of D*A*M. So what is it?  It’s essentially a standard MKI circuit, but with the first two germanium transistors … Read more

Germanium Variable Booster

Variable booster NPN GE v1 83641fd42195

Nothing groundbreaking today—just a variable-gain germanium booster I through together this afternoon, heavily inspired by the D*A*M Red Rooster. I built mine on a slightly different layout, but if I do another one I’ll use this version; it’s cleaner and a bit easier to wire.  And if you like the idea of incorporating a trim … Read more