Sunday, 29 December 2013

Ibanez Standard Fuzz

No way we're going to beat last year's number of layout posts :) We might break the verified 600 before new years though :)

Since i was up for taking on the big fuzzes.. Here's another vintage fuzz with up octave overtones. The layout turned pretty neat with some symmetry in there, but it'll once again eat up your 10µ cap supply :) Original has no polarity protection nor filter cap, so you should think about adding those yourself. The first gain stage with SK30A FET is per original, but instead the BCE pinout of the 2SC1815 used in the original, i drew the other transistors to match the pinout of your standard 2N5088 (and similar). Anything with relatively high hFE will work fine. BC550, 2N3904 MPSA18 and so on. Just mind the pinout. I also left the clipping diodes on the edge of the board so one can take them easily on a switch and have his (or hers) way with them. Maybe a three position switch with LEDs, Germaniums and a diode lift in the middle? Tone change switch can be either a toggle or a stomp, which way you prefer it. If you want, you can omit the small link and the cuts from the bottom right off the board and wire the switch lug 2 directly to balance pot's lug 3.



7 comments:

  1. Oh dear lord! Awesome stuff. Gotta bookmark this.

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  2. This my next build before the Big Cheese fuzz.

    The schematic is almost identical to the Univox Superfuzz. Have we had the superfuzz here on a verified layout?

    Think I might build with with Univox superfuzz BOM.
    Has anyone ever compared the two?

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  3. Works. Although i did find out simething that i can't quite understand yet. When the tone change filter is engaged, there is a significant volume drop. The reason i don't quite get it is that the filter is exactly the same as in Univox Super-Fuzz. With the filter bypassed it sounds like it should. Upping the value for 1n cures it, but takes away a lot of low frequencies. Tried on a few values, but everything makes me want to ditch the board completely. Yes it works, but... I'm having thoughts about the 1n cap being between rows that are next to each other..

    Also. Once again, i'm not too pleased with the germanium clipping texture either :) So Doron. Yes. Build the Univox. It is better.
    +m

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    Replies
    1. Hey, i found a few thread about this subject, with of course, different approach. i haven't tried any of the build nor fixes but i own a "bruno fuzz machine" and the original has the volume drop too.
      http://www.harmonycentral.com/t5/Effects-Pedals-Multi-Effects-and/ibanez-standard-fuzz-question/td-p/2930564
      http://www.freestompboxes.org/viewtopic.php?f=13&t=15379&start=20

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    2. That's pretty strange as the Univox doesn't have that :) But it seems that the layout works 1:1 with the original.
      +m

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  4. I make my own version of this pedal and I found with using high quality electrolytics and good GE diodes (I use old stock OA90's) I have unity volume at about 1 o'clock.

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  5. I wasn't too nuts about this as a guitar pedal, but it makes a mean bass pedal.

    I also did the diodes on a switch, bat41 on one side, germanium on the other.

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