Wednesday, 16 November 2016

Fuzzhugger Doom Bloom

From the source:

The Doom Bloom reimagines Algal Bloom with new controls, more lows, bite, mass, and more available
headroom. It's stupid with lows and menace! Designed to hold together and retain clarity with lower tunings.
Controls:- Bloom is Bloom...it's fuzz+gain+definition. It increases gain and note separation. Rather than going mushy or
washy, it holds together pretty nicely when cranked. It holds up well with lower tuning because of this.
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Head is headroom. As you turn it right, headroom increases, making the pedal less clipped, but also louder and
more open (favoring transistor fuzz over clipping diodes). So while turning right reduces how clipped it is, it also
increases mass, for some big thunderous chords. Full-spectrum massive attack!
-
Body (Body and High work together). Body shifts a huge amount of lows in/out of your sound...but leaves your
highs totally in tact. (Unlike Tone controls that make you choose either [bassy and dark] OR [bright and thin]). Body
also adjusts fuzziness.
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High lets you then control your highs, separate from Body. Set your lows and fuzziness where you want it, then
adjust your highs.
-
Bias biases the first transistor gain stage (controlled by the Bloom knob), functioning as an additional boost and
character control with massive boosting power!







29 comments:

  1. Looks like the pulldown resistor and 47pf cap are connected to nothing on one end

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    1. This comment has been removed by the author.

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  2. Ah, deleted my last comment about the polarity protection diode cause I misread the layout.

    The diode is connected between 9V and body 1 right now though so check that part out

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    1. crap, you're right. moved some stuff last minute and forgot to save it.

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    2. put things back to how i had them before. quick glance looks right to me now.

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  3. The diode is floating off the supply now. Are you planning on matching the schematic with the parallel protection or changing it to series protection?

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    1. Wtf. Not sure why it's like that. In the schematic it connects to ground on one end and the other connects to the 100r set +9V, and I had it there before I reuploaded it. I'll take another look on my computer when I take a break and see if it's in the right place there and it just got messed up when it was uploaded or what I did.

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    2. ok, put it back the way it should have, so should be good. such a simple circuit, and me making so many mistakes, it's killing me.

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    3. The schematic has the diode with striped end pointing *towards* +9v. The way you have it now will allow current to flow from +9v through the diode and the jumper straight to ground, i.e. shorting thw supply. You could just flip the diode orientation (which would make it like the schematic, i.e it will wor, but it is a pretty poor polarity protection since it just shorts the supply if polarity is reversed) OR flip the diode, remove the jumper and move the red +9v wire down two rows. This gives series polarity protection which will protect both the supply and the pedal if polarity is reversed.

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    4. That's a good idea nocentelli. I was looking at the polarity protection and thought it was really the best implementation. I'll make the change when I get home.

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  4. And the "want to build" stack is growing and growing...

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  5. fixed the power protection, and the tone section including changing the 330nF cap to 33nF as mentioned in the FSB forum post.

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  6. Yeah I've been wanting this one since I built the Algal Bloom. These are great sounding Fuzz units to my ear.

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  7. updataed the layout to match the changes in the trace over at FSB, specifically the 47pF cap should be 470pF

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    1. The 470n in the power supply is also 47n on the trace, and apparently mislabeled 470n on the schematic.

      Not that I really expect it to make a difference!

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    2. Didn't see that change in the last update. I'll fix it later, but agree that shouldn't make a difference.

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  8. 2 clips. First in standard tuning, getting the glitchy radio sounds, second with a downtuned guitar, getting some heavy doom. The original pedal owner tells me they sound accurate.

    https://soundcloud.com/user-562468024/alexsez-doom-bloom-clone-2016-11-16

    https://soundcloud.com/user-562468024/alexsez-doombloomclone2-b-tuning-2016-11-16



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    1. So does this mean it is verified by you? I ask because the status is still unverified. I can't wait to start this build. Cheers

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    2. Yes I built two of these. This one, and my own layout. They sound the same. The bass control cuts clockwise, as in the original unit.

      I changed one thing on this layout though, to match the original trace.
      Connect Bias 1&2 on the bottom row, instead of 2&3 on row "J".

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  9. this fuzz is awesome, thanks for the layout, I'm going to build this.
    and is it 12cuts 2links or there is 1 more link I miss?
    thanks.

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    1. you're right. i made a change and moved stuff around and forgot to remove the 3rd link from the layout.

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  10. Oh boy, this is gonna be my Christmas break project for sure.

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  11. Zach, add a DPDT wiring for this curcuit please. And where to solder the LED+ wire? I'm novice, just trying to understand.

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    1. Hey man. Typically you're not going to use a dpdt switch for wiring if you want to use an led, you want s 3pdt switch. To see how to wire it up using s 3pdt switch look at the tab on the top labeled offboard.

      If you're set on using a dpdt you're going to want to build another board called a millennium bypass board. Here's the link to the millennium bypass:

      http://tagboardeffects.blogspot.com/2014/01/millennium-bypass-2.html

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    2. Wow, thanks a lot, everything is clear now! :) 3PDT switch is exactly the thing I need. My mistake :) This fuzz is outstanding, can't wait for building it! Thank you, Zach!

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    3. anytime man. glad to help. don't forget if you run into issues with your build, have questions about building, or just want to chat check out the forum. oh, and welcome to the community man.

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  12. Has Alex s verified this or not?

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