This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.

Tuesday, January 8, 2019

Friedman Golden Pearl

Here's a good sounding lower gain overdrive from Friedman. Several options with this circuit with clipping and tone options on toggle switches. Fairly transparent, as they say.



29 comments:

  1. Built and verified (perf). Works perfect! Thanks D!

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    1. Alright! Speedy Pete is back in action!!!

      Your ability to verify has always impressed me, man. I can hardly keep up with the projects I've started to build.

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    2. Wad, first of all you have to build new garage for new pedals!

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    3. Of course!!! Great idea, Vit!

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  2. For volume and tone, pls kindly advise where is lug 2 connect?

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    1. Lug 2 Volume goes to output. Lug 2 tone ties in to Lug 1 tone.

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    2. Tone - Lug 2 connects to the 47nF cap.
      Volume - Lug 2 connects to output.

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    3. And holes for these connections are already provided in both pcb and perf board images.

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  3. Hi,
    Thank you very much for sharing. Built it and works so cool, I like this.
    If I change caps at hi-cut section with larger value, will it cut hi more or less? Could you please teach me?

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  4. Oops, thanks a lot for kindly help

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  5. Need some help again, I can't get 1n5817 in shops, can I use 1n4001 instead, also, I just can get a B1M intead of the suggested A1M pot, can I just use the B1M pot?

    Thanks again for help

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    Replies
    1. A 4001 will work fine, as will a B1M. The sweep of the pot will just be different than the original.

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    2. Thanks so much for the kindly help

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  6. Surprisingly nice sound considering the bare bones look of the circuit, gets a lot closer to a klon/timmy than you would probably expect.

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  7. Hi, by what can we replace lm833

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    Replies
    1. Any dual opamp should work. TL072, 4558, etc.

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    2. ok thank you so much, i will test with

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    3. I love this pedal and after various tests, I prefer with 4558. Thanks

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  8. Verified ..very good sound OD..Done on Perf board. Used JRC4558,HI CUT caps are, 2.2 nf instead of 22n,and 3.3n instead of 39nf. Thanks & more DIYs TO Effects Layouts..from Manila,Phils.

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  9. First of all, thank you for this blog, it´s amazing and really help me. I build this project twice, I verified everything. And with the switches in the middle position (no clipping, and no hi cut), with the gain all the way up, it sounds a noise behind the note (I don´t know how to explain it), but it´s an unpleasent noise. Someone, or everyone have the same issue?. Any idea about what could be?. I tested it with several amplifiers and guitars, with the same result. Thank you

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  10. someone works on the voice switch?

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  11. Its true: HI CUT caps are, 2.2 nf instead of 22n,and 3.3n instead of 39nf! look at the scheme https://www.pedalpcb.com/docs/AurumDrive.pdf
    Nice over, tried LF 353n, JRC 4558, 4580, Opa 2604,NE 5532,TL072. Took JRC 4580.
    Sound like Timmy or Vemuram, only with led clipping

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  12. hi all, Can someone explain the meaning of the LED diodes on this pedal ?
    I built the pedal and it sounds great but the LEDs don't light up. thanks

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    Replies
    1. They're just being used as clipping diodes. They're not supposed to light up necessarily.

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  13. Hi Everyone,

    I'm new to the DIY scene. Can someone please give me a complete explanation and/or the values of the parts? so that I can order the right ones. There is a few that I'm unsure of, especially the capacitors. Thanks!

    RESISTORS (1/4W)

    R1 1M
    R2 1M
    R3 1K
    R4 2K2
    R5 10K
    R6 10K
    R7 22K
    R8 2K2
    R100 10K
    R101 10K
    R102 10K

    CAPACITORS

    C1 22nf
    C2 22uf
    C3 100p
    C4 2n2
    C5 47n
    C6 3n9
    C7 47p
    C8 10u
    C100 47u

    SWITCHES HICUT SPDT (On / Off / On)
    VOICE SPDT (On / Off / On)

    INTEGRATED CIRCUITS

    IC1 LM833N

    DIODES

    D2 1N4148
    D3 1N4148
    D4 1N4148
    D100 1N5817

    LED1 3mm Yellow LED
    LED2 3mm Yellow LED

    POTENTIOMETERS

    VOLUME A10K
    TONE B25K
    DRIVE A1M

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