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Wren & Cuff Phat Phuk  [traced]

Posted: 20 Jan 2017, 04:16
by johnk
rockett88 was kind enough to post a schematic of this nice sounding Jfet buffered germanium boost so i redrew it a little clearer:
Phat Phuk Schematic.png
i drew up a pcb for it, etched and tested it and it sounds great:
PhatPhukboard-01.jpg
001- Phat Phuk B Layout.png

i also drew up another one to have the bias trimpot externally so you could adjust the amount of overdrive and this one has board mounted pots.
001- Phat Phuk B 2 Knob Layout.png

Re: Wren & Cuff Phat Phuk

Posted: 20 Jan 2017, 08:19
by Manfred
What type of Germanium transistor is applied?

Re: Wren & Cuff Phat Phuk

Posted: 20 Jan 2017, 09:28
by plush
Manfred wrote:What type of Germanium transistor is applied?
Looks like pnp

Re: Wren & Cuff Phat Phuk

Posted: 20 Jan 2017, 09:52
by johnk
mine's an unmarked PNP with an hfe of 91.

Re: Wren & Cuff Phat Phuk

Posted: 24 Jan 2017, 23:55
by rocket8810
ah john, you beat me to it. i was just about to post the schematic and whatnot.

Re: Wren & Cuff Phat Phuk

Posted: 18 Feb 2017, 03:14
by Belanger88
I have gut shots of the super phat phuk if anyone wants to see, I got rid of it so I only have good shots of the top of the board but most components are labeled with the silk screen and it appears to be very similar. I know there's some pretty clever people in here who could probably make some educated guesses

Re: Wren & Cuff Phat Phuk

Posted: 20 Feb 2017, 22:37
by rocket8810
go for it. i'ld be happy to work on a trace for it. it's going to be damn near impossible without a pick of the bottom though.

Re: Wren & Cuff Phat Phuk

Posted: 25 Feb 2017, 05:38
by Belanger88
sorry I wasn't even building by the time I got rid of this pedal or I would have taken more useful pictures

Image

Image

Image

Re: Wren & Cuff Phat Phuk

Posted: 25 Feb 2017, 05:43
by johnk
i have a feeling that the suppa uses a Jfet opamp instead of the J201 buffer.

Re: Wren & Cuff Phat Phuk

Posted: 25 Feb 2017, 06:35
by Belanger88
black PCB will make it impossible I'm sure, you can't see the slightest hint of a trace even