Wednesday, 30 March 2016

Madbean Turnabout (JHS Andy Timmons)

Brian's take on JHS Andy Timmons pedal.
This is not an exact clone of the original circuit and the video is for reference only:



39 comments:

  1. Is there any thread to reference Brian's changes/choices? Just curious.

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  2. Is he plugged right into a recording interface, or a guitar amp? Does it have speaker emulation?

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    1. NM - I saw the $2000 Imperial amp flash on the screen for a second.

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    2. He actually sends the Imperial through the two notes torpedo live. So you're hearing the Imperial through a speaker simulator. I know he uses an IR based on a Tone King cab.

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  3. Used a NE5532 and works great. Gonna experiment with some other IC's. Thanks for all the great info!!

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    1. TL072 rips in this. Keeper for sure. RAWK!

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  4. Haha! Now I get the irony of the name. It's a copy of a copy:) I like the subtle jab, "it sounds good (like the Crunchbox)."

    Thanks to Alex for keeping this site very vital and giving us builders some new challenges to sink our teeth into:)

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  5. Hi.
    I was talkin to an emplyee of mine the other day and he asked why I would have 4 or 5 distortion/drive/fuzz pedals on my effects board. Can someone explain what he meant? Soooo many pedals. So little time!!

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    1. "why I would have 4 or 5 distortion/drive/fuzz pedals on my effects board..."

      Why does an artist have 20 colors of paint on his/her palette? Can't we just use two or three colors? Likewise for effects pedals. Heck, there are nearly 300 different fuzz pedal projects on this site!

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  6. Anyone getting excessive noise with this circuit? The switch and pots all work as expected but I'm getting loads of excessive background noise.

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    1. Johnny, im getting tones of noise, its even Lauder than the effect! Hahaha did You found out what was the problem? Thanks in advance

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  7. Played around with this one and settled on TL072 and ITT 425 diodes. Don't know anything about these diodes but of all the different diodes and LEDs i have these sounded the best. I do get some background noise but its minor.

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  8. Built this and really like the range of sounds and clipping options. I did put a 330p across the led clippers to tame some fizzle on the decay.

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    1. Did you put the 330p cap on the right side of the D2?

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  10. What's the green circle on the right of pin 4 of the IC?
    Thanks

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    1. that's a double link. so when you're building it you'll have 2 links in 1 hole. so you have one link from the right of the 100nF cap on row 6 to under pin 4 of the IC, then another from under pin 4 of the IC to the row below.

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  11. I think the 220nF cap at the bottom is not supposed to connect to the bottom row, it is supposed to connect to ground, which is the row just above the bottom. (according to the Madbean schematic) He calls it C4 in the schem. Otherwise it looks right.

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    1. Hi Michael.
      The layout has already been verified.
      The 220n cap (C4) goes from the 1K resistor to ground (there is a link under the IC pin 4)

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    2. Yep. I see it now. Thanks. Pedal sounds great - thanks again for the layout.

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  13. Very nice pedal! I used to say that the Suhr Riot was the best od/distortion pedal in such a small format as far as handmade is concerned, but the JHS AT(madbean version), is really better!

    Here is my build!
    Will post samples later

    http://hgecontraptions.blogspot.ro/2016/05/built-jhs-andy-timmons-pedal-clone.html

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  14. This is one of the greatest pedals, I ever built and tried. The different diode configuration switch is awesome.

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  15. I want to build this pedal but i don't have an on/off/on switch .i have a few on/on mini switches kicking around .how would i use them or just the one ...

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  16. I'm trying to build this and there is no sound coming out from it, can someone help me to understand what may be the problem here. Followed exactly the diagram and checked it multiple times. Would it be the LM833P that I'm using?

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  17. I love this pedal! Goes next to my riot build.

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  18. There's something wrong in the Mosfet clipping section: another BAT41 Schottky diode is needed for the second 2N7000 as well (like in the Zen Drive clipping section), otherwise you get too an asymmetrical clipping (more than 2.0V for the side with the BAT41, only 0.6V for the side without it)

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    1. well i think that d4 is also linked to the 2n7000 on the left i guess its still assymetrical because 2 are connected to the left mosfet . anyone else want to chime in?

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  19. Hi, I think the clipping section is not correct or badly designed, is it pisible?
    Do you think it is correct?
    I think this layout has been plotted based on this scheme:

    http://s1305.photobucket.com/user/jessebelanger1988/media/Mobile%20Uploads/image_zpstxiekqiw.gif.html

    but I think the clipping section is poorly drawn.
    I think the switch should switch between 2 options:
    -clipping 2 red leds
    or
    -clipping zendrive style,
    right?
    I think he's not doing it like this
    , is it right or am I wrong?

    Thanks

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  20. This is a zendrive clipping;

    http://s90.photobucket.com/user/sympathyforme/media/pedal%20stuff/Zen_Vero.png.html

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  21. another question,

    ... apologize for my insistence, (I'm in the middle of build this and I need answers)

    The switch in the original is 3 positions, up, middle and down. In this design there are only 2 positions, is it correct ???

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  22. Hi there, I just build this awesome Pedal, it does really sound awesome, but here is the Problem, it is kind of extremely loud, so if I kick in this Pedal, I can't turn up the volume past 9 o'clock because it then is way to loud, and also if I turn up EQ or Air it is getting louder, maybe that is supposed to happen, but if I turn up EQ and Air fully, I can't get any unity Volume anymore, its always louder or of
    Any Idea what it could be?

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  23. Just built it, and after missing a cap, 3 links, and sticking something in the wrong hole (yeah, that's what she said) I finally got this working. Sounds pretty good, but I'm a little underwhelmed. My LEDs don't light up, unlike my crunchbox, and it doesn't seem to have as much dirt (as my crunchbox).

    I dunno.

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  24. Thats A bit strange, the led's should light up when the toggle switch is set to the middle position. Maybe you've burned one of the transistors or the IC? Mine is quite gaini :D

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  25. Built this last weekend and it sounds amazing. I was wondering if it can run at 18V and if so would it make any difference?

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  26. Just finished this bad boy off today. Sounds awesome and worked first time.

    Really chuffed with this build. Cheers for the layout Alex

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  27. Finished this bad boy today. Sounds awesome and worked first time.
    Cheers for the layout Alex

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