FENDER: One knob tone control

Screenshot 2025 05 16 at 4.16.06 pm 4fb56688cc90

This is the classic single-knob tone circuit made famous by a number of Fender amps—most notably the 5E3 Tweed Deluxe.  Despite not inventing it, Leo must have thought that he nailed it when he first dropped this into a guitar amplifier: it’s simple, clever, and very musical.  Despite using only a handful of parts, it … Read more

FENDER MDX Circuit / AION FX Elite boost / preamp

FENDER MDX Aion Elite vero layout v1 f7656c17a1fa

There’s a few variations of this circuit, so I’d recommend reading through the Aion FX build docs or maybe just skip the vero all together and buy the board from them. The build docs also include LTspice simulations of the frequency response, so that saves me a bit of time plotting them out. I’ve labelled a … Read more

Fender Blender MOJO layout

Fender Blender MOJO 5e56130904d8

It is all about the MOJO!  Got a comission to build a bunch of the larger classic fuzz circuits using “mojo” parts, more preciely 1/2w carbon composition resistors and axial electrolyctics/tantalums. It may not be a huge difference soundwise but it is quite fun to build and it looks cool.:-p. Power filter caps remains radial … Read more