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Monday, June 1, 2015

JHS Superbolt

Here's a popular JHS pedal that emulates old Supro/Valco amps: the Superbolt. It has a remarkable similarity to the Run Off Groove Supreaux and Supreaux Deux. It seems to be a slightly modded Supreaux, with the high/low switch and 18 volt supply of the Supreaux Deux. A charge pump is also added so the pedal can run off a typical 9v supply. You can use an ICL7660 or MAX1044 in place of the LT1054 (though, if you use the MAX1044, be sure to ground pin 5). This one's laid out for on board pots as well as the SPDT switch. Be sure to bias the JFETs to around 9v, then adjust to taste.



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16 comments:

  1. GuilhermeSeptember 10, 2015 at 6:13 PM

    You can tag this! Works and sounds pretty good. Just an advice: tune the trimpots by ear, using the recomended voltages it sounded like crap!

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    1. JCabiApril 20, 2020 at 1:41 PM

      Hi, Guilherme. Can I ask a question. Did you just follow this layout or did you do something? Thanks just a newbie here.

      Delete
  2. Alex VolskyJuly 3, 2016 at 8:56 PM

    Can you give me layout file? I have only SOT-23 J201 (MMBFJ201)

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  3. pandalonMarch 31, 2018 at 10:56 PM

    can you do this for smd jfets?

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  4. Anibal BáezJuly 22, 2019 at 11:00 PM

    This comment has been removed by the author.

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  5. Anibal BáezJuly 22, 2019 at 11:04 PM

    Hi!. I think there's an error in the charge pump section (using lt1054 not max1044): pin 1 and pin 8 shouldn't be connected, it's that right?. Thanks for your great work!!!

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  6. giuspolidoroApril 26, 2020 at 12:43 PM

    This comment has been removed by the author.

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    1. IvanMay 12, 2020 at 9:48 PM

      This comment has been removed by the author.

      Delete
  7. IvanMay 12, 2020 at 9:49 PM

    This comment has been removed by the author.

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  8. IvanMay 12, 2020 at 9:50 PM

    What type of integrated IC did you use, the 7660s, the max1044 or the LT1054? I await your comments, thank you.

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  9. giuspolidoroSeptember 7, 2020 at 11:47 AM

    This comment has been removed by the author.

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    1. Effects LayoutsSeptember 7, 2020 at 1:39 PM

      Adjust the trimmers till you get about half the voltage on each drain, then adjust and tune by ear. If your JFETs are out of spec you may need to use higher value trimmers.

      Delete
  10. guitarJanuary 12, 2021 at 7:01 PM

    where is the Drilling Templates this pedal? I looked at it and there was no

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  11. guitarJanuary 12, 2021 at 7:01 PM

    where is the Drilling Templates this pedal? I looked at it and there was no

    ReplyDelete
  12. JCMay 24, 2023 at 7:47 PM

    This comment has been removed by the author.

    ReplyDelete