Home › Forums › Help/Technical Questions › Big Muff Pi NY EC3003C Tone Bypass?

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  • December 23, 2011 at 5:47 am #82064
    derekb
    Member

    hey guys, I recently acquired a Big Muff Pi NY reissue of the EC3003C variety, does anyone know the proper solution for performing a tone bypass on these units? I know on the original 3003A’s you could use R5 and C8 with an SPDT but I’m not sure what points are equivalent on the 3003C, any guidance is much appreciated :)

    December 23, 2011 at 10:03 pm #116589
    scottv
    Member

    Its the same components to pull from ground (R5 & C8), i did it on this newer version of the circuit board and it worked fine.
    I followed the circuit trace and lifted one leg of each component (the leg to ground) from the board. That is when looking at the component side up with the pots at the top the leg on the right hand side for both the resistor and capacitor is the one i pulled out (i’m pretty sure of this as i just did this about a week ago). I actually replaced the crappy ceramic .01uF cap with a poly film .01uF.

    I referred to this: http://www.muzique.com/lab/tbypass.htm
    and
    I used this as a guide: http://roadsideguitars.blogspot.com/2009/04/adding-tone-bypass-to-ny-big-muff.html

    I’ve seen another method of “tone bypass” on youtube that i’m pretty sure is wrong and does nothing but mimic the tone of just turning the tone pot full CCW, but never really tried that other method as this one is more logical.

    December 24, 2011 at 2:39 am #116591
    derekb
    Member
    Quote:
    Its the same components to pull from ground (R5 & C8), i did it on this newer version of the circuit board and it worked fine.
    I followed the circuit trace and lifted one leg of each component (the leg to ground) from the board. That is when looking at the component side up with the pots at the top the leg on the right hand side for both the resistor and capacitor is the one i pulled out (i’m pretty sure of this as i just did this about a week ago). I actually replaced the crappy ceramic .01uF cap with a poly film .01uF.

    I referred to this: http://www.muzique.com/lab/tbypass.htm
    and
    I used this as a guide: http://roadsideguitars.blogspot.com/2009/04/adding-tone-bypass-to-ny-big-muff.html

    I’ve seen another method of “tone bypass” on youtube that i’m pretty sure is wrong and does nothing but mimic the tone of just turning the tone pot full CCW, but never really tried that other method as this one is more logical.

    my mistake I completely missed the R5 component since it was hiding right next to C8 on the 3003C!

    December 27, 2011 at 12:21 am #116610
    derekb
    Member

    anyone performmed the Emitter or Resistor mods on an EC3003-C as well?

    January 17, 2012 at 12:48 am #116779
    derekb
    Member
    Quote:
    anyone performmed the Emitter or Resistor mods on an EC3003-C as well?

    bumping out of interest

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