Filter
Jürgen Haible Wasp CV Filter LM13700 version
Chris Stelloh have been playing around with Jürgen Haible Wasp CV Filter and sent me two verified layouts.. In hi sown words: I had a chance to build up that LM13700 version of the Wasp Filter and found that using a much different value of potentiometer for the cutoff control made for a better filter … Read more
Electro Harmonix The Worm / Madbean Charlatan
A vintage big box The Worm with some useful improvemnts and mods by Madbean. The power section have been reworked by a voltage doubler and a voltage regulator for 9v to 15v operation. An internal volume trimpot is added. And the unknown original vactrols is replaced by a trio of LDR/LED pair. Schematic and more … Read more
Electro Harmonix Doctor Q – Vintage
Layout based on the old version from the 70s. Note that this one is really picky about op amp selection so be prepared for some socketing…
F’Deck / Broughton Hybrid HPF
Another guest appearance by Sebastian who generously shares his interesting designs! Here is a snippet of his description for it: …hybrid of the F’Deck (series 3) and the Broughton high-pass filters. I wanted the steeper slope of the F’Deck (24db/octave below 35Hz) with the gain boost of the Broughton—so, here it is! … Read more
Madbean Headtrip 2
Once again, a guest appearance. Chris at CDC was brave enough to dabbling with some Spin FV-1 processors. Yes, these are SMD parts there is several vendors online that sell adapter boards. This one is VERIFIED. Since I started building effects in 2020, there has been a “level up” step I’ve been avoiding. As … Read more