And this is the one I did the bipolar voltage converter for! :o)
This pedal uses a 9V supply which is then converted to +/-15V using a 5V regulator into an expensive NMA0515SC 5V to +/-15V converter, plus a couple of inductors which is another unusual component for us to use. So I preferred the idea of using components I was more familiar with and which could be obtained at a lower cost and in any quantity.
So you're going to need the bipolar converter layout I did from yesterday. This will take you a bit above the +/-15V used by the original which may give you a little more headroom, but if you want to drop it a bit further consider putting a polarity protection diode in series with the 9V supply to the charge pump. That will drop the voltage around 0.7V before conversion to get things a bit lower. I think if you do that and use 1N4001 instead of 1N5817 in the charge pump you'll be very close to the required number. Or just have a bit of extra headroom, it's up to you.
You can either make it all on one board, or I reckon it would be easier to keep the converter on a separate daughter board which can be tucked away somewhere in the box.
The diodes are unknown, here is a pic posted by Olof who posted the schematic on Freestompboxes if anyone has any ideas:
It has been suggested that the red and blue one may be a 1S1588, which I think is one of the unobtainium diodes in the Analogman King of Tone. And the other has been suggested to be a 1N4249. If you can get them to try then all the better, if not then just use a 1N4148 and 1N4001 combination which I'm sure will get you 99% there if not all the way. Or experiment and let us all know how it turns out! :o)
A wide dynamic range of overdrive sounds.
The Providence SOV-2 Stampede OD pedal is designed to deliver natural overdrive without obscuring the inherent characteristics and tone of the guitar being used. It features a special bipolar power supply that powers the internal circuitry with boosted voltage, providing a wider dynamic range than possible with conventional 9-volt powered overdrives. For singing lead tones and solid, chunky rhythms, there's nothing like the SOV-2 Stampede OD.