VFE Fiery Red Horse [traced]
- drbob1
- Cap Cooler
Interesting overdrive with dual "diodes in the feedback loop" op amp gain stages, including one setting where both op amp stages have single diodes for very asymmetric clipping. Sounds kinda cool and especially cool that he describes the circuits and shows shadow masks and gut shots on the website: http://www.vfepedals.com/fiery-red-horse.html
Ballsy move, cool guy!
Ballsy move, cool guy!
- mmolteratx
- Degoop Doctor
What? There are no op amp stages in that pedal... It's very clearly a Muff.
- roseblood11
- Tube Twister
Sure, he confirms that one the website.
Many interesting pedals there, just variations of well-known circuits, but very usefull ones.
I'd be interested in schematics for many of them, esp. the Distortion3 (based on DOD250/Distortion+) and the Pale Horse.
One thing I don't understand about the Pale Horse: I can't see any germanium or schottky diodes near the mosfets. How can the mosfet clipping work then? Or is it just clipping of the body diodes?
Many interesting pedals there, just variations of well-known circuits, but very usefull ones.
I'd be interested in schematics for many of them, esp. the Distortion3 (based on DOD250/Distortion+) and the Pale Horse.
One thing I don't understand about the Pale Horse: I can't see any germanium or schottky diodes near the mosfets. How can the mosfet clipping work then? Or is it just clipping of the body diodes?
- B3ar
- Breadboard Brother
You can wire mosfets like diodes. This is probably best noted in versions of the Fulltone OCD.roseblood11 wrote:One thing I don't understand about the Pale Horse: I can't see any germanium or schottky diodes near the mosfets. How can the mosfet clipping work then? Or is it just clipping of the body diodes?
Here is the schematic of v2 Fiery Red Horse for anyone who is interested. It's a BMP-style fuzz circuit, with variable power from 3V to 16V (or higher if you plug in 12V or 15V power supply), plus active tone stage and variable compression in the 2nd distortion stage. The charge pump circuit is built on a simple 555 timer chip.drbob1 wrote:Interesting overdrive with dual "diodes in the feedback loop" op amp gain stages, including one setting where both op amp stages have single diodes for very asymmetric clipping. Sounds kinda cool and especially cool that he describes the circuits and shows shadow masks and gut shots on the website: http://www.vfepedals.com/fiery-red-horse.html
Owner & designer at VFE Pedals. Please email me directly at peter@vfecustom.com if you need a quick response.
Here you go! FYI, the Pale Horse has a charge pump that is not pictured. so the power rails are +9V and -9V.roseblood11 wrote:I'd be interested in schematics for many of them, esp. the Distortion3 (based on DOD250/Distortion+) and the Pale Horse.
Pale Horse schematic:
Distortion3 schematic:
Each mosfet is configured in a way that puts the body diode & Vgs saturation in parallel (and reverse polarity). The two mosfets are then put in series (also in reverse polarity). The result is a very high clipping threshold - around 2.7V on average. That's why a charge pump was used, to give the op amp the headroom needed to drive this configuration. It also lets the Pale Horse get LOUD!roseblood11 wrote:One thing I don't understand about the Pale Horse: I can't see any germanium or schottky diodes near the mosfets. How can the mosfet clipping work then? Or is it just clipping of the body diodes?
Owner & designer at VFE Pedals. Please email me directly at peter@vfecustom.com if you need a quick response.
If you're interested in more schematics check out this thread:
https://www.freestompboxes.org/viewtopic ... 5&p=264287
Or VFE website: support - discontinued pedals:
http://vfepedals.com/discontinued.html
https://www.freestompboxes.org/viewtopic ... 5&p=264287
Or VFE website: support - discontinued pedals:
http://vfepedals.com/discontinued.html