Friday, 25 January 2013

DOD FX55-B Supra Distortion

Why not repeat the same perfect scheme that worked pretty well ten years earlier?




9 comments:

  1. This comment has been removed by the author.

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  2. It's my video !! ..No problem ....
    Good job, your site is very very great !!

    my channel on youtube for effect pedal is "yococ14"

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  3. I just build this, and there are some problems...theres some oscillation. I replaced all 120pf to 220pf but theres still oscillation. I changed pot also and tried different ic, but no diffrence. Everything works, exept for the oscillation. Any suggestions?

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    Replies
    1. One common cause of oscillation is interference between the input and output wires, and they are obviously very close together from the point they connect to the board. Try moving one as far away from the other as you can and see if you notice a difference. If you do then you may want to try a shielded cable with the shield grounded for those two wires.

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    2. I try that. I looked at the schematic for this and noticed that instead of the 10uf that goes to the 27ohm resistor is 1uf in the schematic, it dosent matter maybe :)

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    3. Anything in the gain section of the circuit could affect it so I'd say try it.

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  4. I changed both 10uf to 1uf and shielded cables, but the squeeling remains. Its just those last millimeters on the distortion pot that squeels. Well, I maybe try to work with it a little more later on...

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  5. First IC should be in/out buffer - I guess it would be smart to think of a LITE version without the buffers?! Renegadrian

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