Earth Sound Research Graphic Fuzz (schem inside)

[agoldoor]

Whoops! Good catch! I didn't see the mistake until you responded, sorry about that guys!

Earth Sound Research Graphic Fuzz:
http://www.aronnelson.com/gallery/main.php/v/foxfire/SCHEMATICS_001/ESR+GRAFFIC+FUZZ+SCHEMATIC.png.html?g2_imageViewsIndex=1

Not sure if this second one is correct or not, but there is this one too:
http://www.stompboxes.co.uk/forum/download/file.php?id=1835

[alex.s]

Hey there, noticed the links to the schems are broken in both your posts, probably cut because of lenght. May I suggest you try reposting them by clicking on the "Link" button above and enter the url first that way? All great requests, so keen to see them available :)

[mirosol]

Those open up ok here... There seems to be some quirks how the Nabble forum handles urls...
+m

[mirosol]

Hmmm. That's pretty weird design.

[agoldoor]

Hehe... yeah, that's what a few people have said who have analyzed the circuit.

And I corrected the linking error, which is why its readable again.

[mirosol]

Doable, but that "ground is not the minus of the battery" thing will take some thinking....

[agoldoor]

*coughBUMPcoughcough*

[mirosol]

:)

I've tried to do this.. That ground not being the minus (nor plus) of the supply gives a little trouble... I'll check my drawing again, but..
+m

[mirosol]

There you go...
http://tagboardeffects.blogspot.fi/2013/01/earth-sound-research-graphic-fuzz.html
+m

[IvIark]

I'm not entirely sure which schematic we should use for this one.  I've had a look at 3 different ones and they're all different so if we publish a layout at best it's going to be a guess as to which scheme to base it on.  I think we should hold off on this until we can either get a verified schematic or a unit or clone that we can have a proper look at.

[mirosol]

Yup. Sounds solid reasoning to me too.

As usual, i just grabbed the schematic and drew it. After Mark noticed that there were things wrong with it, i checked the site where i got the schematic - "...then I'm afraid it's full of blatant errors." So that's not verified by any means. The two others, posted above are also different from each other...

So. No ESR Graphic Fuzz layout until we have verified schematic. Sorry for false alarm and/or getting your hopes up.

We're sorry.
+m

[agoldoor]

*sniiiifff* (sadness)

But you guys are probably right. I think the Jerms layout is confirmed as he personally drew it from a unit in front of him. (The Jerms one is the hand-drawn one.) I'll send some emails and see if I can't get anyone to confirm one.

Thanks for the work though!

[john]

Hey everyone, new here, but i've been doing some research to find out some info about this pedal. I have found some really good pictures of the board from the top, and bottom, and someone on another site that has a working clone and added an additional knob of adjustment. I'm dying to get this pedal together, cause its so fuzztastic that it sounds like it can engulf the earth. hope this helps.

Images

Schem discussion

Schem

DAM Forum Working on it 1

Moded 1

jimmy behanfx board

[peeps]

There is a verified schematic and layout at FSB in a thread I started Apr 17.  The layout is also in the open chat area here.  I know you guys can make it pretty!  

[johnk]

thanks for posting your vero of it. I made one yesterday, and it works perfectly. funny thing is,  actually prefer running it on 5 volts instead of 9.