EHX Muff Fuzz on the slab

Discussion in 'Effects, Pedals, Strings & Things' started by Rob Sharer, Feb 5, 2008.


  1. Rob Sharer

    Rob Sharer Muso-Luthier

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    If we had an Effects Technical Info forum, this would go there. Rather than lump it in with the amp tech stuff, I'm posting here instead.

    Anyhoo, here is a little Electro-Harmonix Muff Fuzz I've had for years. In fact, it was my first effect! It was working at some point; if memory serves, a wire or two came loose and a friend put it back together for me. It never fuzzed again.

    [​IMG]

    Fast forward to 2008: found it in a box recently. Still not working. I removed the wires to the jacks and the battery clip, thus undoing a 20 year old jackleg repair. This is how it looks now:

    [​IMG]

    That's the input jack to the left. The two naked posts and the two solder blobs visible just under the tip connection of the input jack are the four posts of the switch {***EDIT: there are actually six posts on the switch (duh)...the naked ones are the middle two***}. Now, how do I put things back together? I found a schematic here: http://www.schematicheaven.com/effects/eh_mufffuzz.pdf , but it doesn't seem to conform at all to this particular pedal (I think the earlier ones were less complicated than mine). Any help would be appreciated. Cheers,

    Rob
     
  2. Rob Sharer

    Rob Sharer Muso-Luthier

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    Original post has been edited to correct a minor uck-fup. The switch has six posts, not four. Cheers,

    Rob
     
  3. Rob Sharer

    Rob Sharer Muso-Luthier

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    Hanging on for a bunt up...
     
  4. Groovey Records

    Groovey Records Member

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    hey analogs your man

    www.analogman.com
    or
    Mike Matthews @ EH

    try analogman first he can make it better then new he does good restoration work.

    regards
    Groovey Records
     
  5. Rob Sharer

    Rob Sharer Muso-Luthier

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    Well, yeah. If I can't manage to do it myself, I'll send it off to Mike. However, since it's just 4 wires plus the battery clip, it seems like I ought to be able to accomplish that myself. With a little help, that is...

    Rob
     
  6. Rob Sharer

    Rob Sharer Muso-Luthier

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  7. Rob Sharer

    Rob Sharer Muso-Luthier

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    Considering saying "Bueller" bump...
     
  8. Trout

    Trout Member

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    I have no idea if this info will help you fully, But I had links to 2 different versions of the Muff Fuzz, one is a transistor model, the other is a Op amp style.

    I'll PM you the links.

    Trout
     
  9. Uma Floresta

    Uma Floresta Senior Member

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    You should post this at diystompboxes.com
     
  10. Rob Sharer

    Rob Sharer Muso-Luthier

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    Thanks, guys. Trout, I looked at the schematics, and so far I can't seem to match either one to what I'm looking at in front of me. I've seen pictures of several different versions of this effect, so maybe mine's not represented there. I'll keep chewing on it. Thanks again,

    Rob
     
  11. donnyjaguar

    donnyjaguar Member

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    Colour me stupid, but where do you put the battery? These are dead easy to fix, but not without some probing.
     
  12. Whiskeyrebel

    Whiskeyrebel Member

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  13. Rob Sharer

    Rob Sharer Muso-Luthier

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    Yeah, I took the battery clip off as well. I'm pretty sure it was hooked up dead wrong anyway - when I plugged everything up just to see if it would perchance work, the 9v got too hot to touch within about 0.5 of a second! Cheers,

    Rob
     
  14. Rob Sharer

    Rob Sharer Muso-Luthier

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  15. mythbuster

    mythbuster Member

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  16. Rob Sharer

    Rob Sharer Muso-Luthier

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    Bing-f*ckin'-GO, my friend! You nailed it! Thanks a million,

    Rob
     
  17. Rob Sharer

    Rob Sharer Muso-Luthier

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    It fuzzes! Thanks again, Mythbuster.

    Rob
     
  18. WV.Hillbilly

    WV.Hillbilly Member

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    OK.
    I've got a Muff fuzz in the same condition as Rob's.
    I looked at the schematic, but still can't tell where to solder the positive battery lead. Where on the PCB does it go?
     
  19. MikeMcK

    MikeMcK Member

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    EDIT : Yikes... my post ended up in the wrong thread... must haved seemed a bit confusing.
     

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