Comments on: Dr. Boogey

By: James Myers

James Myers — Fri, 03 Feb 2012 03:55:27 +0000

Guass,
I successfully built this pedal with just a couple mods and love it! Voltage at Q1 – Q4 are all exactly 5V (It’s where my tone was) Thanks for the design and PCB layout, it made things go a lot faster in the build. Do you have any chorus, flange, delay or gate schematics you would recommend? BTW Most of the parts are on Mammoth electronics.com and the others are on Mouser.com

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Wed, 25 Jan 2012 01:50:29 +0000

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By: Kedi

Kedi — Mon, 09 Jan 2012 04:59:16 +0000

Hello, I’m from Turkey.
My English is not very good.
You would have a question.
Unfortunately, Turkey has no transistor j201.
Instead of using BFW13.
BFW13 will use the system j201 instead of transistors.
Voltage values, respectively, how many should be set?
I hope you understand question.
Thank you to friends who are interested.

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By: mustafa kuşcu

mustafa kuşcu — Sun, 18 Dec 2011 17:57:26 +0000

çok güzel bir elektro bağlama anfisi olur bu devreden

By: Sault

Sault — Sat, 03 Dec 2011 11:02:32 +0000

The bf245c isn’t going to work – too high of a pinch-off, too much current consumption.

The bf245a, 2n5457, and 2n5484 are all viable replacements, but will all have less gain than the j201. Lowering the source resistors from 1.8k to 1k can squeeze a little more gain from them, as long as you trim carefully at the drain.

By: miftah from indonesia

miftah from indonesia — Tue, 22 Nov 2011 01:38:37 +0000

i,m build it, can i replace the j201 with bf245c??? I can’t find j201 in my city, help me please,,, thanks

By: miftah from indonesia

miftah from indonesia — Tue, 22 Nov 2011 01:37:02 +0000

can i replace the j201 with bf245c??? I can’t find j201 in my city, help me please,,, thanks

By: John Fiaschetti

John Fiaschetti — Tue, 15 Nov 2011 16:34:35 +0000

Hello,

I’ve breadboarded a Dr. Boogey and done a couple experiments with it (single tone pot for example). I’ve got a decent sound at lower volumes. When I turn the volume pot up past maybe 1/3 of the way, the circuit starts to oscillate wildly at about 2.3kHz. It gets worse as I turn up the volume. I’m trying to isolate if it’s a specific stage or maybe just that the breadboard with wires on it is picking up too much interference. Any ideas? Thanks a lot!

By: ALEX GOMEZ

ALEX GOMEZ — Mon, 24 Oct 2011 23:41:30 +0000

hello!

Greetings from Chiapas, México. I´m trying to build this pedal and I´ve installed all the components in the pcb. Now… I just need some help… could anyone hepl me by telling where are the IN, OUT, GND AND 9V? PLEASE HELP!…

alex