Electronic designs

Pedals and small amplifiers, designed and proven on the bench. Each design has its schematic, its bill of materials, the story of how it came about and a demo on video.

CT055 · Rev A.2

MGP guitar amp

A Marshall MG100 head rebuilt around a two-channel LND150 MOSFET preamp of its own.

CT031 · Rev B.4

Reckless diode compressor

Diode-bridge gain cell with a feed-forward side-chain: studio dynamics in a pedal.

CT033 · Rev B.2

Pellucid compressor

Ultra-low-noise compressor for guitar and bass, with just two knobs.

CT030 · Rev C.4

Engineer's Thumb redux

The Valve Wizard's Engineer's Thumb compressor, with a noise gate added.

CT075 · Rev B.0

PMC: Poor Man's Compressor

A quality compressor from a handful of penny transistors: no op amps, no OTA.

CT081 · Rev C.2

Little Jim

Three MOSFET gain stages after the sound of a cranked Marshall.

CT082 · Rev B.0

Moon LaNDer

Low-noise overdrive on LND150 depletion-mode MOSFETs, with a James EQ.

CT048 · Rev B.0

Choob Dreamer

Tube Screamer and SD-1 territory, with Bite, Symmetry and Presence controls.

CT077 · Rev D.0

Reckless Abandon

Two-channel guitar preamp with voicing switches and a huge bass control.

CT050 · Rev F.2

Boba FET

4 watt JFET practice and recording amp that runs from a pedal supply.

CT071 · Rev A.6

Rosie

“Though she be but little, she is fierce”: a JFET mini amp from clean to brown.

CT063 · Rev B.3

Baby Jim MkII

5 watt single-ended EL84 valve amp with a flexible, switchable preamp.

CT053 · Rev E.1

Reckless Vibe

Photocell-style vibe on OTAs, with a true sinusoidal quadrature LFO.

CT028 · Rev D.3

Auto de FET

All-analog 15 W FET amp with every setting under microcontroller control, and presets.