Hermida - Zendrive Project at FSB.org

[NOTE - This post also contains info on the Fuchs Plush Drive & Jetter Gain Stage Red]

Here is the sought after "Zendrive" overdrive pedal. If you're unsure of what these are check out the Hermida Audio Website; http://www.vendio.com/stores/HermidaAudio/item/effects-pedals/zendrive/lid=2384441

And here is a demo video (there are plenty of sound samples on the Hermida website though...);

A full project, presented by the freestompboxes forum member "stratotrasto". What a great project, complete with drilling templates for an enclosure! Here it is. Many thanks Strato!




Now the Fuchs Plush Drive - Well, it's just a Zendrive clone. Here's the evidence:

And the Jetter Gain Stage Red:

Soulsonic traced one out, here's what he found:

And the Schematic of the Gain Stage Red:

And here's what he had to say about it:

"Yes, it's almost an exact clone of the Hermida Zendrive. The differences are minimal if you can even call them differences. Instead of the "Voice" control, the Jetter has the "Hard/Soft" switch which toggles between two static values of the exact same "Voice" circuit. The 100pF cap has been omitted from the feedback loop of the overdrive section. The Tone control is 100K linear, instead of 50K. A reverse polarity protection diode has been added... that's about it. The opamp type is unknown - the numbers have been sanded off it. The MOSFETs have been sanded as well, but my Atlas DCA correctly identified them as N-Channel Enhancement Mode MOSFETs, which means they are likely the usual 2N7000/BS170 type. Two of the diodes are those same kind of little blue glass ones as Kerry described were in the Zendrive, and the other diode is a 1N60 or similar germanium (also like described as being in the Zendrive)."

Here's the Zendrive topic on freestompboxes for reference: http://www.freestompboxes.org/viewtopic.php?f=7&t=268

Here's the Fuchs Plush Drive forum topic on freestompboxes.org for reference: http://www.freestompboxes.org/viewtopic.php?f=7&t=2411