Wednesday, 27 December 2017

DOD Carcosa Fuzz

Anders knocked out a layout for this a few days ago on the forum and beat me to it, but I still wanted to whip up a layout for the main page.

From the Source:

The DOD Carcosa Fuzz is a doorway into an alternate fuzz universe, where classic tones of legend coexist with splattered and shattered Pollock abstractions. Combining the Carcosa's wide-ranging AFTER bias control with two toggle positions creates tones that range from porcine fatness to dessicated shards. This versatility makes the Carcosa Fuzz a good companion for dirty or clean amps. True bypass, tons of output, and the visage of the King in Yellow sets the stage for fuzzy madness.
The DOD Carcosa Fuzz has an exaggerated mid-range and treble character that help it stand out in a mix. It has been designed to cut through a dense and heavy band but still have great note articulation with chords. However, when extreme bias (AFTER) ranges are selected many wild and over-the-top sounds are possible.









25 comments:

  1. are the transistors really 2b5089 can't seem to fin them? or just a typo with the n? (2n5089)

    Thanks!

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    1. typo, they're 2N5089 transistors. nice catch. i've updated the layout.

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    2. Thanks! Can't wait to make this pedal

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  2. Replies
    1. Cheers for updating the layout with the info. This might be my first pedal of the new year

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  3. I built this one, but doesn't work for me, did anyone had luck with this layout?

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  4. yeah, id say verified. knife your rows etc bud.

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  5. Yes definatly verified.
    FYI (as stated in manual)
    before is amount of fuzz
    After is bias
    Hicut (reduces hi freq detail- start at 9oclock and go back for bright, forward for dark pickups.)
    And the switch is demhe/ hali with demhe being a low mid b bass boost and hali being a bass cut.

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    Replies
    1. Awesome Joseph. I'll mark it later tonight, and I'll put in the switch in the layout notes. Thought it was in the notes.

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    2. No worries man (still me, changed my display name)
      Its an interesting one, i wanna give it some more time but my missus is having a paddy so i have had to shut the amp off and have a blazing row with her. Fun times.

      But back to fuzzes im on my major fuzz kick atm and this is defo a keeper.

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  6. Just checkin, volume 2 to output and to ground through a 680pf cap?

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    Replies
    1. Hey man. Volume 2 goes to output like normal, and you put the 680pF cap from lug 2 to ground. If you put the output/volume 2 to ground no signal would pass.

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    2. Gotcha, that's what I figured. Thanks man!

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    3. anytime man, happy to help. i would have made the connections on the board, but figured having 2 more wires on the board would make it less neat, and i would have had to added another row. plus, to make it super easy, just attach the cap between lug 2 and lug 1 of the volume switch, super easy.

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  7. Anyone else having issues with this? I get an effected signal but it is very weak and the controls seem to have little to no effect on the overall sound. I did not have any BAT41 so I substituted BAT46. Could this be the issue?

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  8. Figured it out. Might want to update the orientation of the transistors for us color by numbers guys. 2n5089 is EBC from the top with flat side facing left.

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    Replies
    1. thanks for the catch. i forgot to turn them around. layout has been updated.

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  9. Hi guys!
    It is impossible to find C100k pot where i live, only C5k, C10k, C500k, and C1M. What should i do? Switch to other taper? If then, which: linear of log?
    Thanks in advance!

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    Replies
    1. To get a reverse log pot,you can always wire a log pot backwards. It works well, but the max and minimum will be reversed aswell.

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    2. Pavlo,
      Pick B250k and throw 250k resistor across legs 1-3
      You'll get 125k pot with a characteristic very close to C

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  10. Thanks for sharing, nice post! Post really provice useful information!

    Giaonhan247 chuyên dịch vụ gửi hàng đi hàn, gửi hàng đi đức cũng như dịch vụ gửi hàng đi úc, gửi hàng đi canada cũng như dịch vụ gửi hàng đi nhật uy tín.

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  11. Finally got around to building one last night. Sounds good, everything works, but I'm getting a lot of white noise with the after cranked up and the gain over halfway. Anyone else having this issue? Admittedly,I boxed it up at 2am. Could be a grounding issue, I'll try and resolder my ground points tonight.

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    1. Played around some more and any setting with the bias in its last guarter of its rotation induces serious white noise. I don't know where I went wrong. Puzzling.

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  12. Update: if anyone has excess noise with this build you may need to swap the trannies. My 5089's were all around 600 hfe. After some trial and error I landed on 5 bc109c's around 500-550. Cured the problem, may still play around some more. On the blog, Anders said he needed to use 5088's in his for the same reason.

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  13. I have played one of these and it is amazing. It's actually the fuzz I have been looking for! So if I wanted to build one without the bass boost switch can I simplify the section with the 220K/10nF caps? Looking at the schematic there is a symmetrical section with a 220K resistor in parallel with a 10nF cap on each side of a 100K to ground. The 220K resistor on the switch kinda bypasses this set-up to provide a bass boost. Can I replace all of this with just a cap and resistor if I don't want the boost?

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