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.

Thursday, May 31, 2018

Run Off Groove Mockman 2.0

Continuing to knock out the last few ROG designs I haven't laid out. This one's a pretty easy little circuit, emulating the distortion in Rockman amps designed an used by Boston guitarist Tom Scholz. The toggle allows you to go between 80s (classic) and 90s (modern) tones, and it should all fit in a 1590a. Schematic, sound clips and more info on the ROG site.

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12 comments:

  1. MetalheadMay 31, 2018 at 5:05 PM

    What is the value of Cx?

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  2. retiredbodymanMay 31, 2018 at 8:43 PM

    Check the notes and schematic on ROGs website.
    http://runoffgroove.com/mm2.html

    ReplyDelete
  3. Лучше чем ничего...June 2, 2018 at 2:53 AM

    IC1 - 4558?

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  4. UnknownJune 2, 2018 at 3:55 PM

    Verified!!

    Very bright distortion (I use a strat), decent sounding, I used a JRC4558, I wonder if it is possible to add a tone control...

    ReplyDelete
  5. UnknownJune 4, 2018 at 8:20 PM

    Please try ROG Tri vibe, hopefully to fit in a a 1590B enclosure.

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  6. PeteJune 5, 2018 at 1:20 PM

    I used a 330pf and a 4558D...Sounded pretty good! Cool the Engines!

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  7. UnknownSeptember 27, 2018 at 7:54 PM

    The capacitor is to taste. 330PF the guitar fx layout website mentioned. It's really to taste. 470pf is a good place to start. Now the IC chip.

    copied off their website. Literacy is a gift as saw this comment a while ago.
    The original op-amp was an RC1458, however you are encouraged to audition any dual opamp, as this component is an integral part of the sound. The JRC4558 opamp works quite well. Some faster/better op-amps like TL072 and NE5532 produce a slightly brighter sound. Modern rail-to-rail opamps like TLC2262 and TLC2272 sound a bit louder and better defined. In particular, our favorite op-amps were the JRC4558 and TLC2262.

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  8. Ricco SeixasNovember 20, 2020 at 6:51 PM

    Great sound with 391pf to cx,ic ne5532.
    47nf to 68nf,6.8nf to 22nf.
    Thanks for your beatiful layout fornecer!!!

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  9. PierreFebruary 26, 2021 at 5:55 PM

    I don't hear much of a difference when using the switch. What circuit is added or removed?
    Is the switch change subtle?

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  10. PedalJPNOctober 20, 2023 at 12:45 AM

    Does anyone have any ideas for adding gain adjustment pots?

    I have built and played with many of these and it is time to adjust the gain.

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  11. Orang GilaNovember 25, 2023 at 9:09 PM

    I build it several time and improved it with gain control, just replace 10K resistor on input with 100K or 250K potentiometer (just check on gain calculation). For CX capacitor (filter for removing/reducing oscilation) you can tweak with some value from 330pf to 10n (the results vary in sustain output) . It works to me and i hope working for everyone. Happy build everyone, cheers!

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