EarthQuaker Devices - Hoof Fuzz

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Bernardduur
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Post by Bernardduur »

Check; nice inside shot!

My guess? Big Muff with 2N130X transistors with LED's as diodes for the fuzz stages.

Edit: found another gut shot at Discofreq

Edit2: from their werbiste:
Hoof Fuzz
EarthQuaker Devices Hoof Fuzz can produce sounds all the way from gritty overdrive to a huge wall of doom! It is a germanium/ silicon hybrid big muff style fuzz (it's based on the old green Sovtek Big Muff but it's a pretty different dude now) with massive amounts of volume and sustain on tap. It has a tighter sound than most muff's which makes palm muting an option and open chords ring out clear. The altered tone control (as well as a few other keys changes) eliminate the problem of being lost in the mix and sends your guitar ragin' on it's way!
'No more....... loud music.......'

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Post by MoreCowbell »

2n1304's for Q2 and Q3 it looks like. 2n3904 for Q1 and Q4.

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Post by disorder »

anyone have the values for this beast?

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Post by devastator »

I made a Russian big muff with supposed specifications of this pedal. I tried it quickly , it seems to sound good but I haven't tried it more because I haven't box to put it into.

I believe it used LED in feedback loop, low gain transistor , and a Mids control (AMZ presence control).

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Post by disorder »

I figured that's what the added fourth control was. Shouldn't be too hard to wire up to an existing Big muff board.

I know it uses LED's in the earlier stage and then silicon diodes as well. Not sure if he changed any of the resistor or cap values.

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Post by WhiteKeyHole »

Poof.
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34fbgwo.jpg
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Post by Lawnchair »

I had the 3 knobber here for a few months. Didn't quite stand up to a vintage Russian green. It lacked the huge low end when you crank the tone to the left. A bit scoopier too.
Just didn't seem worth tracing.

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Post by SGJarrod »

Has anyone got any new info?..such as a layout for the 4 knob version...If somebody had a vero layout they would be my personal hero for the day :thumbsup

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Post by Valoosj »

Does anybody have a picture of the trace side of the board? I wouldn't mind producing a schematic if I have the right pictures.
Bazinga!

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Post by azrael »

Are those high gain Germaniums? I thought you needed at least 300 hFe to make this circuit work well.

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Post by Hides-His-Eyes »

azrael wrote:Are those high gain Germaniums? I thought you needed at least 300 hFe to make this circuit work well.
Depends on your idea of working well.
Testing, testing, won too fwee

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Post by SpencerPedals »

And yes, they are

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Post by Sadcadaver »

A friend wants me to build him a Musikding Russian Muff kit, and I suggested we try swapping out the trannies and diodes to make it more like the hoof. However, those Germanium trannies are a bit expensive to just 'try'. Can anyone else suggest some cheaper alternatives? Doctor Tweek has some AC176's but they only have hfe between 50 and 180. Musikding has some AC141's. What are they like?

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Post by azrael »

I used some silicons around 120 hFe, and just increased the B-C junction cap to around 800 pF. Seems like a very hoofy build to me.

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Post by Sadcadaver »

I was planning on socketing the transistors and clipping diodes anyway, and I'm suspecting it's the diodes that make all the difference. I'd still like to try some high gain Germaniums though, but thanks for the input.

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Post by azrael »

The diodes make the circuit, of course. That much is obvious. But the germaniums can be seen as having a treble roll off than silicon, so I wanted to use the Miller effect to my advantage and increased that treble roll off cap to make then sound more like germanium.

The transistors themselves are not doing any clipping, so making them germanium seemed useless.

I use some red LEDs, for clipping.

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Post by TheLemon »

On the Hoof use from 100R to 51R on the germaniums emmiter resistors for best results and LEDs with a voltage knee of 1.8V for the smoothnes in their
clipping section

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Post by azrael »

oh yeah, i used 100 ohm emitter resistors as that's what i could see in the gutshots posted. :)

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Post by TheLemon »

What I like to do in big Muff circuits is use 15k (instead of 8k2) into the second stage, then 1K (instead of 8K2) into the third stage.

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Post by JVanDe7 »

Can anyone suggest any particular mods to help make a straight-up green russian muff clone sound more like a Hoof?

It looks like 4 diodes need to be LED's instead, right? And 2 transistors need to become Ge? Any ideas on how that 4th pot ( "Shift" ) is wired in?

Any other ideas/suggestions? I built the green muff from GGG and didn't modify the design at all. But now I wish it was a Hoof. :( :mrgreen:

Schematic http://www.generalguitargadgets.com/pdf ... a841b3e85a
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