Skip to content

Super-Freq

  • Pedal Building Workshop
  • Parts and Resources
  • PCB Projects
    • Flatline by John Hollis
    • Silicon Tone Bender by Mic Tester
    • Smash Drive by Aron Nelson
    • PWM Build
    • Build your favorite Big Muff
    • Morbid Fur/Haunting Mids Fuzz
    • Ugly Face
    • Vulcan Overdrive by Joe Davisson
    • UBE Screamer by RunOffGroove
    • 22/7 by RunOffGroove
  • Pedals for Sale

zappa

Zap Frequency #3

March 2, 2025September 10, 2022 by Mitchell

I’m experimenting with the Harmonic Energizer. Read more about it in my previous post. I updated the PCB with room for two pairs of clipping diodes. With this update. Using the prototyping service at PCBWay.com is a great way to make high quality PCBs at a very reasonable price. The key is to order several … Read more

Categories Uncategorized Tags 1590B, harmonic energizer, j201, TL074, zappa Leave a comment

Harmonic Energizer #2

July 24, 2022 by Mitchell

My second build of the Harmonic Energizer. If you haven’t read my first post read about that build here. This second build tries out a couple more mods.  Discussing this circuit over at DIYStompboxes.com Mark Hammer suggested adding some clipping diodes to this circuit. Since I had some boards I thought I’d try this out. The idea is … Read more

Categories Uncategorized Tags harmonic energizer, systech, TL074, zappa Leave a comment

Harmonic Energizer

July 21, 2022 by Mitchell

Here is a clone of the Systech Harmonic Energizer. This is a parametric EQ. It’s like a single-band equalizer with a control to set the width of the frequency band that it affects. It also has a control to sweep the frequency similar to a wah pedal. The Harmonic Energizer has been described as the … Read more

Categories Uncategorized Tags 1590B, eq, harmonic energizer, parametric, systech, zappa 3 Comments
© 2026 Super-Freq • Built with GeneratePress