OCD Fulltone

[sergio]

Hi , I'm searcing the schematic of OCD OVERDRIVE Fulltone , anyone can help me?
Thanks

[Structo]

The OCD is reportedly based on the Voo Doo Labs OD but uses FET's for the clipping.


http://www.freeinfosociety.com/electron ... hp?id=1208


http://www.freeinfosociety.com/electron ... .php?cat=1

[sergio]

Thanks for the informations , I'll seek in web again .

Sergio

[Structo]

When I googled for it, it seems you are not alone in looking for a schematic.
All my searches were guys asking, "Do you have the schematic for the OCD?"

[moj067]

Check :
www.freestompboxes.org
Salud!

[Deric]

Not a schematic, but a start........

http://www.aronnelson.com/gallery/main. ... emId=14049

[mhuss]

I have an OCD, and it is fairly well gooped. I can say for sure there are some TO-92 transistors and one DIP-8 underneath.

--mark

[sergio]

OK Mhuss , but there are thousand OT-92 and operational amp.

You can tell me the exact initials?
Thanks

[Deric]

The newer versions of the OCD are not gooped. There are 3 TO-92 type parts. 2 of them are 2N7000 used as diode clippers and one is for his silent switching/LED.

The op-amp is a TL082.

I believe there are now 4 different versions of the OCD. There are gut shots and clear directions on how to change between v1, v2 and v3 on Fulltone's web-site.

http://www.fulltone.com/PDfFiles/OCD%20 ... _small.pdf

[sergio]

Thanks Deric but I'm not able to enter the link

I don't know

[doctord02]

the link is a .pdf file, so you must have Acrobat installed. It opened fine for me.

[sergio]

I don't know , I've Acrobat Reader , but when clik on link , the screen become white...boh ...

[skyyamps]

if anyone does figure out a schematic, draw it out or something. people would kill to have it.

[pamaz67]

Check freestompboxes.org.
Gut shots and hand drawn schematic with an error, but AFAIK quite easy to correct.
I haven'seen it in detail BTW.

Finally a small hijack on the post. Pls. check my website www.paolomazza.com ( online since at least yesterday!!!!!!) and let me know what you think on the guestbook.
Thanks

[Bernardduur]

Check Freestompboxes.org

The OCD is "just" a VoodooLabs Overdrive, slightly modded. Mods are a tubescreamer like gain control, some value changes and a versatile tone section. Clipping is done with MOSFET's protection diodes to Vref (4.5V).

There are now 4 versions; the last one (v1.4) has an additional germanium diode next to the MOSFET protection diode on one side to make the clipping assymmetrical

Great pedal!