This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.

Tuesday, October 31, 2017

Landgraff Dynamic Overdrive/Clay Jones Overdrive

Probably two of the most hyped Tube Screamer clones around. The only real difference between the Dynamic Overdrive and a TS808 is the clipping switch, offering symmetrical red LEDs, diode lift, and asymmetrical silicon diodes. The Clay Jones Overdrive is mostly the same, just without the clipping switch (just LEDs), and a Burr Brown OPA2134 in place of the JRC4558 opamp. If you want to build the Clay Jones version, omit the 1N4148 diodes and place a jumper between pads 2 and 3 of the clipping switch pads. Like most Tube Screamer clones, what you use for Q1-2 doesn't matter all that much. The Landgraff uses 2SC1815 transistors (BCE pinout) and the Clay Jones uses BC546B transistors (CBE pinout). Alternatives would be the usual 2N3904, 2N5088, etc. The layout below follows the more common CBE pinout. For a drilling template, use the Cmat Mods Signa.


  1. Still better pcb design, than landgraff has.

  2. Hmmm, is it just coincidence that the latest Wampler podcast was about this pedal's origin? Hehe.

  3. Built it and works fine. The led clipping sounds immense but the asymmetrical Si diodes sounds too farty for my taste. Thanks for the layout!