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Dr. Boogey by electrictabs gaussmarkov December 14, 2007 http://gaussmarkov.net/index.php?page=layouts#drboo Notes
Source: http://geocities.com/electrictabs/dr.boogey.png This is electrictab’s pedal emulation of the Mesa Boogie Dual Rectifier Solo Head. This circuit has been heavily discussed on Aron’s DIY forum and the contents of this project are the result of a diystompboxes.com community effort. Compared to the original, “miller capacitors” (C17, C18, C19 in the schematic), an input coupling capacitor (C21), an input filter resistor (R18), polarity protection (D1), and power supply filtering (R16, R17, C20) have been added. This layout has also been worked out by forum participants. It features star grounding, guard traces, simplified signal path, and side-by-side supply rails. Also, the tone section has been rescaled by a factor of 10 to reduce output impedance. For additional information, see this thread.

Layout

1

Schematic

2

Parts List
C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 D1 Q1 Q2 Q3 Q4 Q5 1uF 22nF 2.2nF 1nF 20pF 1uF 22nF 22nF 1uF 6.8nF 220nF 220nF 30nF 100uF 5nF 1nF 220pF 220pF 220pF 100uF .1uF 1N4004 J201 J201 J201 J201 J201 gm-caps-film-box gm-caps-film-box gm-caps-film-box gm-caps-film-box gm-caps-ceramic gm-caps-film-box gm-caps-film-box gm-caps-film-box gm-caps-film-box gm-caps-film-chicklet gm-caps-film-box gm-caps-film-box gm-caps-film-box gm-caps-electro-pol gm-caps-film-box gm-caps-film-box gm-caps-ceramic gm-caps-ceramic gm-caps-ceramic gm-caps-electro-pol gm-caps-film-box gm-diodes gm-trans gm-trans gm-trans gm-trans gm-trans R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 BASS GAIN MID PRESENCE TREBLE TRIM1 TRIM2 TRIM3 TRIM4 VOLUME 2M gm-resistors 1.8K gm-resistors 2.2M gm-resistors 680K gm-resistors 470K gm-resistors 1.8K gm-resistors 470K gm-resistors 1M gm-resistors 3.9K gm-resistors 330K gm-resistors 220K gm-resistors 1.8K gm-resistors 10K gm-resistors 4.7K

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