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  • October 8, 2020 at 5:59 pm #15132
    Anonymous
    Inactive

    Hi everyone, can any one tell me what D1 and D2 do in this circuit.

    I’m going to change some diodes and transistor up to see what I can come up with.
    Do both D1 and D2 clip?

    thanks in advance

    October 8, 2020 at 7:48 pm #15136
    Cybercow
    Participant

    Simmental – no. D1 and and D2 are NOT clipping diodes. D2 is the part of the power supply section and helps with reverse polarity protection. D1 (on the out-side of Q1) is a 9.1v Zener and clamps (limits) the positive portion of the AC signal output to 9.1v max and tends to warp the output signal waveform to ad some interesting harmonics to the fuzz. (At least, that’s how I see it.)

    It’s advisable to NOT experiment with D2.

    October 8, 2020 at 11:15 pm #15144
    Anonymous
    Inactive

    Ok thanks…..so if I wanted to do something with D1, can I swap some different diodes to see how it effects the sound?

    October 9, 2020 at 9:28 am #15147
    Cybercow
    Participant

    Simmental – sure. Retaining the polarity is important tho.

    October 10, 2020 at 8:03 am #15166
    Anonymous
    Inactive

    Thanks @cybercow

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