Monday, 23 March 2020

Fortin 33

"Fredrik Thordendal’s signature 33 pedal is a sonic detonator tool that will transform any amplifier into a metal wrecking ball machine!"
Schematic and pcb available on Pedalpcb website here.


11 comments:

  1. Alex, thank you for the layout. Really radical boost, fun build.

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  2. I'll have to get a few parts, but i'm dying to try this one out!

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  3. Well I'm getting signal through so that's the good part. Bad part is that I get the dreaded charge pump whine (very strong) until the 1044 overheats and cuts out.

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    1. Are you using a 1044SCPA?

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    2. This comment has been removed by the author.

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    3. I tried using a MAX1044CPA, 7660s, and tried lifting pin1 and using an lt1054. I think there is probably just something wrong with my build. I am able to use a stand-alone 9v to 33v converter (using a MAX1044) where I put the +33v lead on the negative/cathode of D6 and it works fine.

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    4. Hi Convergent Sound, do you means the boost works fine after feeding 33v on vcc? because I had noise & whine problem too, it louder when vol up,
      I read 26v on opamp pin7, got no idea how to suppress noise..

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    5. Correct, on vcc. I used the 33v charge pump from here:https://tagboardeffects.blogspot.com/2016/11/charge-pump-extravaganza.html
      My chage pump was actually putting out around 35v, so I'm sure you can use the 25v charge pump if you needed to. I haven't noticed any more noise than what a boost would normally introduce with the 33v pump.

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    6. Scratch that (somewhat). With the separate charge pump I am getting a little whine that's audible when using high gain. I'll try out some other tricks and report back.

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  4. build it, boost works fine, noise loud specially the vol pot at 80-100%, I used 7660s, maybe noise-gate need when use, thanks for the layout, heres short demo clip : https://www.youtube.com/watch?v=ck71ERenNMY

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    1. and some shot & a short clip for record here: https://photos.app.goo.gl/4CahnaFRWnwsQ3ex9

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