D*A*M Forum

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:


Layout:

good one

Excellent work! I've wanted to know about this pedal ever since i read the Tone Bender History page, thanks!

no output cap?

FOXFIRE wrote:no output cap?

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

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.

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:


analogguru

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.

SonicVI wrote: No, I don't have Paint.

If you have Windows98 or XP you will have it as a windows-tool - for free.

analogguru