Your Source for DIY Pedal PCBs and NostalgiTone! › GuitarPCB Forum › GuitarPCB Build Support › Old Muff’n Board – R23

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  • December 11, 2022 at 6:09 pm #27021
    Anonymous
    Guest

    Been making pedals on and off for a while now (mostly off)

    So I have a real old Muff’n board – maybe from 2014 or so that I’ve started and stopped too many times now and I’m trying to finish it.  I have some hand written notes about putting a 5K pot in place of R23 which is between Q4 and ground.  I can’t find anything in build documents on why I would do this.  Can someone shed some light on if that is a worthwhile mod or maybe I wrote down the wrong resistor to make variable?

    Thanks

     

    December 12, 2022 at 8:12 am #27022
    Billy
    Moderator

    That particular resistor would affect the gain of that stage obviously Q1 here

    December 15, 2022 at 4:38 pm #27049
    Anonymous
    Guest

    Oh yes, this graphic looks familiar – much appreciated.

    January 8, 2023 at 3:14 pm #27286
    Anonymous
    Guest

    Does anyone have a picture of a blank board from old version?  It is the style used in the famous Klingon Muff where the top corners have cut out notches.

    I finally have the intial wiring done, but no sound comes out, but since my components cover most of the PCB labels I can’t really tell where I should be checking.  I’m just hoping for a picture of an empty board so I can do some tracing.

    Thanks

    January 8, 2023 at 3:19 pm #27287
    Anonymous
    Guest

    Nevermind – I found the link to the old forum

     

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