What is this circuit?

[BassVD]

A few years back (well, probably more than just "a few") the guitar player of one of my bands had a pedal made by a DIYer he knew via the interwebz. Long story short: the guitar player doesn't have the contact details nor the e-mails themselves anymore and he can't recall what circuit is in the pedal.

So I'm asking you guys to help me out: what is this circuit?

I included two pictures beneath.

The pedal is actually a two-in-one thing, but I'm only interested in knowing what the circuit on the left is.

It has three pots: gain, tone and volume.
IC is a Burr Brown OPA2604ap.
Two trannies: 2n7000.
One diode: 1n60p.

There are a lot of different caps (electrolytic, ceramic, different types of film foil), resistors are also mixed (metal film as well as carbon film). Choice of components doesn't seem to be very consistent.

I don't want to get the circuits out as there isn't a lot of room to wiggle and they are stuck in there with those plastic poles. Also it'll be a pain in the ass to put it back in there with all those wires running across the boards.

Any guesses what it could be?

If I need to make more pics, or if you need something else, just ask! :)

Thanks!

[Sergio]

http://tagboardeffects.blogspot.com.es/2012/01/hermida-zendrive.html

Maybe this one?

[BassVD]

I came across that one too, but I don't think it's that one. The zendrive has 3 diodes (BAT41's) versus only one (1n60p) in the pedal I posted about. The zendrive also has fewer caps and resistors as well as one pot more...

[Sergio]

You are right, and the stripboard has standing components, not in the tagboardseffects fashion, so its not a zendrive and comes from another page

[BassVD]

Yup, I figured the builder wanted to cram a lot in the pedal, and with standing resistors you can save a lot of space on a piece of stripboard. But it's not tidy, as you can see.

Oh, and I think I found it! My google-fu today wasn't as good as it normally is: it's probably a Fulltone OCD v4 (with pot values from v1).

Thanks for thinking with me, Sergio! I came across the OCD again while googling the Zendrive. :)

[rocket88]

it could still be a zendrive, with 2 MOSFETS & 1 1N60p for clippers, instead of 3 BAT47s. Without seeing the bottom of the board and knowing the component values it's going to be hard to tell TBH.

[BassVD]

True, but I didn't want to tear it apart. So I counted caps and resistors and seems like it's closer to the OCD v4 - actually the number of caps&resistors is spot on, as opposed to the Zendrive.