The Deluxe Bazz Fuss from

by stobiepole

Stobiepole's Bazz Fuss Build

The Bazz Fuss is one of the best beginner projects out there (it was maybe my second or third build). Maybe too simple to need a PCB layout, but hey, I had time on my hands. The layout is for the deluxe version from, including the transformer. The layout allows you to skip the transformer, if you don’t feel the need. Lood guck with it.

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13 Responses to “The Deluxe Bazz Fuss from”

  1. Chris said:

    Hi there,
    I was curious, what does the transformer do and how important is it to this circuit?

    Posted 23.01.2009 at 4:12 am

  2. Oli said:

    @Chris: It seems to me the transformer is not used as one in this circuit but as an inductor. This leads to a band-pass filter with resonance. With a very roughly calculation, the resonance frequency is – with the “gap” pot set to 0 Ohm – around 85Hz. At least if I was right with the inductor-value in the transformer’s datasheet.
    About the importance: Not using the transformer will still let the circuit work (well), but with it, it will re-shape the frequency spectrum especially to the lower frequencies which might be useful in this fuzz-usage.
    Not sure about that, but if you decide to renounce the transformer it could be better to either also renounce C3 and the thickness-pot (as with them but without inductor you only get a high-pass filter) or by adding a simple RC-lowpass, e.g. with a 1k8Ohm-resistor instead of the transformer and after that a connection to C1 and the thickness-pot aswell as a 1uF-cap to gnd.
    But: I’m not that sure about all this 😉

    Posted 21.02.2009 at 10:21 am

  3. Oli said:

    ‘with the “gap” pot set to 0 Ohm’
    There is no such pot, meant the “thickness” pot.

    Posted 21.02.2009 at 10:24 am

  4. Earthscum said:

    The transformer is used, in this case, as a guitar pickup simulator, as outlined by Jack Orman @
    Basically, like many simple transistor builds, the impedance from your pickups are what actually help shape the unique sound. If you use this transformer, it approximates (less resistance) a guitar pickup so you can put this anywhere in your signal chain without ill consequence. If you don’t use the transformer, and you put this after a buffered effect, such as a Boss or Ibanez pedal, you will get the typical nasty transistor distortion that turns us all off unless you’re in some kind of Japanese Noise Punk scene.

    The Thickness pot is just a blend control between the 2 input caps. Simply put, it lets you dial in how much bass is getting through to the circuit, which has an incredible effect on the clipped sound. I love this circuit. I built mine with just Dist and Vol controls for my girlfriend, and just built a new one for myself (both bassists). My new one includes a BMP tone section after.

    Posted 11.10.2009 at 11:18 am

  5. Joshik said:

    What happens to the unused leads from the transformer? Do you cut them off? Bend them out of the way? Solder them to the board unconnected to anything?

    And how do you mount the transformer on the board– by gluing? Or by drilling slots for the little bottom pegs? Or do the two connections hold it in place?

    Posted 02.11.2009 at 11:44 am

  6. Stobiepole said:

    Solder them to the board. There are pads provided on the layout.

    Posted 02.11.2009 at 6:31 pm

  7. CBass said:

    I built this as a present for a friend. I couldn’t get it sound good with a bass, but was very pleased with how it worked with guitar. Definitely worth the small amount of effort required to build it.

    Posted 12.12.2009 at 2:36 pm

  8. Joshik said:

    I just built the original Bazz Fuss (it sounds great!), and am looking forward to building this Deluxe version. Can I replace the 2.2uf polarized capacitor with a 4.7uf polarized cap – like the original BF? Would I have to change any of the other values?

    Posted 17.12.2009 at 6:46 pm

  9. Nick said:

    I know this post is a little old, but can you post additional pictures. of the inside and out? Just curious how you wired the switch, and did you use an led?

    Posted 15.03.2010 at 8:45 pm

  10. phuzzFreek said:

    Version 3 sounds plenty good to me. I like running a treble booster into mine, and i’d diagree with the “too low output” using germ diode. This thing can still wound an amp.

    Posted 19.09.2010 at 4:59 am

  11. Sidiney Leonidas said:

    ( BRAZIL): legal esse progeto 2 plugs p10 e um transformador de correte gosto muito de progetos eleronicos que realmene funcionam. gostei.!!!!

    Posted 28.02.2011 at 3:06 pm

  12. Josh Ledford said:

    I noticed that you on the thickness pot you have #1 lug and 2 lug soldered. On the Dirt you have #1 and 3
    Are you not using lug number 3 on the thickness and lug number 2 on the dirt?

    Also can you show us how the board is wired to the Jacks and the 3pdt switch?

    Posted 15.11.2012 at 1:00 am

  13. Gabriel said:

    Its like you read my mind! You seem to know so much about this, like you wrote the
    book in it or something. I think that you could do with some pics to drive the message home a bit, but other than
    that, this is fantastic blog. An excellent read.
    I will definitely be back.

    Posted 21.12.2012 at 11:13 am