SupaFuzz MK1 schematic and layout

Schematics, layouts & other technical mumbo jumbo.

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SonicVI
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SupaFuzz MK1 schematic and layout

Post by SonicVI » Fri Jul 31, 2009 1:16 am

For those of you who didn't see this in the Sound and Vision forum.

This is the schematic (unverified) of the earliest Marshall SupaFuzz. It's basically a MK1 with a high-pass filter on the end.

There's info about it in Graham's SupaFuzz Data Dump thread here:
viewtopic.php?f=23&t=157

schematic:
Image

Layout:
Image
Last edited by SonicVI on Sat Aug 01, 2009 5:03 pm, edited 6 times in total.
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Electric Warrior
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Re: SupaFuzz MK1 schematic and layout

Post by Electric Warrior » Fri Jul 31, 2009 7:57 am

good one :tu:
My other MKII is a Supa Fuzz.
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tatter
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Re: SupaFuzz MK1 schematic and layout

Post by tatter » Fri Jul 31, 2009 9:17 am

Excellent work! I've wanted to know about this pedal ever since i read the Tone Bender History page, thanks! :tu:
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FOXFIRE
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Re: SupaFuzz MK1 schematic and layout

Post by FOXFIRE » Fri Jul 31, 2009 10:28 pm

no output cap?
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Stu
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Re: SupaFuzz MK1 schematic and layout

Post by Stu » Sat Aug 01, 2009 12:20 am

FOXFIRE wrote:no output cap?
:ohno:
analogguru
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Re: SupaFuzz MK1 schematic and layout

Post by analogguru » Sat Aug 01, 2009 2:25 am

FOXFIRE wrote:no output cap?
schematic and layout are simply wrong..... the 4n7 is not a filter cap instead it is the output cap.
the filter potentiometer acts as a voltage divider in conjunktion with the 47k and 22k resistor.

Have a look at the guts again.

BTW, OC75 are pnp transistors and NOT npn as shown. The second 5µF electrolytic is drawn in the wrong direction.

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SonicVI
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Re: SupaFuzz MK1 schematic and layout

Post by SonicVI » Sat Aug 01, 2009 2:37 am

analogguru wrote:
FOXFIRE wrote:no output cap?
schematic and layout are simply wrong..... the 4n7 is not a filter cap instead it is the output cap.
the filter potentiometer acts as a voltage divider in conjunktion with the 47k and 22k resistor.

Have a look at the guts again.

BTW, OC75 are pnp transistors and NOT npn as shown. The second 5µF electrolytic is drawn in the wrong direction.

analogguru
I noted in the other thread about the transistors. I couldn't make them PNP with the emitters pointing down in DIY Layout Creator so I just used the NPN symbols. We all know it uses OC75's and well all know they are PNP so I didn't really care.
Last edited by SonicVI on Sat Aug 01, 2009 3:04 am, edited 2 times in total.
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analogguru
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Re: SupaFuzz MK1 schematic and layout

Post by analogguru » Sat Aug 01, 2009 3:02 am

SonicVI wrote: I couldn't make them PNP with the emitters pointing down in DIY Layout Creator....
Really ? Did you search on your computer for a program called "paint" ?
Temporarely available for your files:
Image

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SonicVI
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Re: SupaFuzz MK1 schematic and layout

Post by SonicVI » Sat Aug 01, 2009 3:05 am

No, I don't have Paint.

Thanks for the corrections. I'll make the changes in my project. I'll flip the wires on the layout as well.
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analogguru
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Re: SupaFuzz MK1 schematic and layout

Post by analogguru » Sat Aug 01, 2009 3:38 am

SonicVI wrote: No, I don't have Paint.
If you have Windows98 or XP you will have it as a windows-tool - for free.

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