Seymour Duncan - Tweak Fuzz

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Seymour Duncan - Tweak Fuzz

Postby analogguru » 26 Jun 2007, 15:56

Here is the:

Seymour Duncan Tweak Fuzz schematic

enjoy,
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Postby modman » 04 Sep 2007, 00:35

"So, I guess after all, maybe the whole world is a classroom. but it's one where the teacher is also the student, and everybody can design their own courses to take. shit just got deep!" (RnFR)
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Re: Seymour Duncan - Tweak Fuzz

Postby lynessmy » 14 May 2008, 09:24

How are them compared? The link doesn't work...
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Re: Seymour Duncan - Tweak Fuzz

Postby BeAR » 17 May 2008, 08:59

Thanks to analogguru, I just built this stomp box. Schematic is spot on and sounds killer too!
Hope these help others. The ceramic on the bottom of the board just parallels up the 22pf on the top of the board as I didnt have a 47pf lying around.
Image

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Re: Seymour Duncan - Tweak Fuzz

Postby BeAR » 19 May 2008, 01:54

Just another quick update if anyone cares, Ive been playing around with the 2 transistors in the tweak fuzz and Ive found a better combination . Q1 is now a BC550 and Q2 is a BS170. This gives a tighter more focussed fuzz without the wooly bottom end when the tweak knob is wound arount to the 2.2uf cap.
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Re: Seymour Duncan - Tweak Fuzz

Postby marshmellow » 19 May 2008, 10:42

A BS170? You replaced a bipolar transistor with a switching MOSFET??
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Re: Seymour Duncan - Tweak Fuzz

Postby flood » 19 May 2008, 12:40

marshmellow wrote:A BS170? You replaced a bipolar transistor with a switching MOSFET??


:scratch: +1

holy p-n junctions, batman!
In the interest of full disclosure, I am Animal Factory Amplification.
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Re: Seymour Duncan - Tweak Fuzz

Postby lynessmy » 20 May 2008, 02:55

What a nice PCB from BEar. I gonna make this PCB.

In fact, I had drawn one and tried on the weekend. But it doesn't work.
With the audio probe, i found that there are no signal passing thru the selectable CAP, no matter in which position.
Can anyone help me to understand what went wrong? I didn't pop in the 1M pull down resistor.

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Re: Seymour Duncan - Tweak Fuzz

Postby BeAR » 20 May 2008, 22:41

Yeah I know, strange but it works a treat. There is a discussion in the Workbench section about it. Some fets seem to bias just right as a direct replacement. As I said in that post, it shouldnt work, but it sounds better than any other option Ive tried.
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Re: Seymour Duncan - Tweak Fuzz

Postby iggy23 » 23 May 2008, 21:52

has somebody a vero layout???? :roll:
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Re: Seymour Duncan - Tweak Fuzz

Postby B3ar » 23 Dec 2010, 01:37

I got a good deal on a new Tweak Fuzz and am quite pleased with the implementation of SMD -- there are through-holes next to the SMD transistors and resistors, while the caps are already through-hole. Cheap to manufacture, easy to mod -- thanks, guys!

Folks mention that since it's a FF, mod accordingly, and apparently there's a popular easy variant on the Roger Mayer "volume" mods out there. (Remove R5, change R4 to 8k2.) I'm going to try some of the standard value tweaks over on R.G.'s Geofex page, especially those that are just resistor changes.

But I wanted to ask whether anyone has sub'ed out the stock SMD transistors, and whether it was particularly life changing. This is my first FF and I'm not unhappy with the base tone, but I want to be sure I'm not missing the boat.
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Re: Seymour Duncan - Tweak Fuzz

Postby holgar » 24 Mar 2014, 12:34

Thanx for the shem,
this Fuzz Face got the right name, because it is so easy to tweak.
For some more volume I lifted R4 to 1K. For biasing Q2 I took 10K at R5 (4,8V).
Instead of the useles C5 120n I took a Mullard 0,022uF, because I was missing a position 2,5 on the Tweak knob.
Of course the Mullard mojo oozes now through the whole circuit ;-)
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