It's been a long road, but here it is -- a build of version 2 of my Cardinal Harmonic Tremolo, on the new 1776 Effects PCB. A customer got my prototype before I could film a demo, but this one's mine, allllll mine!
The Cardinal Harmonic Tremolo is a transistor and vactrol implementation of the tremolo effects found on Fender amps in the 1960s. It has a waveform control (for square through sine-ish waveforms), a switch to go between harmonic and normal tremolo modes, and a “bright” mode in the middle that modulates only the bass frequencies. The Harmonic mode is an unusual, and beautiful, combination of mild filtering and amplitude modulation with a very slight phase shift.
The volume control has been moved externally to correct for slight differences in level between the modes, and to take advantage of the pedal's modest boosting capabilities.
Version 2 of the Cardinal features a re-designed dry path which is simpler than the original, with more headroom, a more balanced tone, and a newly-designed LFO that elegantly allows Version 2 to operate closer overall to the original amps.