Mad Bean Pedals Wolfshirt2020 User manual

Wolfshirt2020
FX TYPE: Octave Fuzz
Based on the Foxx® Tone Machine™
Enclosure Size: 1590B, 1590B2, 125B
“Softie” compatibility: Softie1&2
© 2020 madbeanpedals
Overview
I’ve said more than once that the Foxx Tone Machine is my favorite fuzz/octave pedal. I think I’ve said
the same thing about the Tychobrahe Octavia. I’ve come to accept that both statements are true :)
If the Octavia (mbp Retrograde) is the classic, Hendrix style oct-up fuzz, then the Tone Machine
(Wolfshirt) is its unruly cousin; the one that has a few too many at family gatherings and then
proceeds to mortify everyone. The fuzz is thicker and the octave up is more prominent. Basically, a bit
of a face melter.
As with all analog octave up generators, the Wolfshirt is monophonic. It doesn’t do chords well at
all with all kinds of odd harmonics taking over. But, for lead and single note playing it cuts through
exceedingly well. The Wolfshirt also includes a switch to defeat the octave up for fuzz only and
replaces the coupling electrolytic caps in the audio path with 1uF lm caps. For mojo.
http://www.effectsdatabase.com/model/foxx/tonemachine#info
Controls
• VOL: Total output.
• SUS: Fuzz amount.
• TONE: Low pass lter.
• OCT : Left: fuzz only. Right: fuzz + octave.
Terms of Use: You are free to use purchased Wolfshirt2020 circuit boards for both DIY and small commercial operations. You may not
offer Wolfshirt2020 PCBs for resale or as part of a “kit” in a commercial fashion. Peer to peer re-sale is ne, though.
Technical assistance for your build(s) is available via the madbeanpedals forum. Please go there rather than emailing me for
assistance on builds. This is because (1) I’m not always available to respond via email in a timely and continuous manner, and (2)
posting technical problems and solutions in the forum creates a record from which other members may benet.

Parts Wolfshirt2020
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Values Wolfshirt2020
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Traces Wolfshirt2020
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B.O.M. Wolfshirt2020
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Resistors Caps Diodes
R1 1M C1 100n D1 - D4 1n34a
R2 1k C2 100n D5 1N4001
R3 47k C3 1n Transistors
R4 47k C4 1uF Q1 - Q4 2n3565
R5 100k C5 1uF Switches
R6 100k C6 1uF OCT On/On
R7 4k7 C7 1uF Pots
R8 100k C8 10uF SUS 50kB
R9 4k7 C9 1uF TONE 50kB
R10 100k C10 2n7 VOL 50kB
R11 100k C11 47n
R12 220R C12 1uF
R13 15k C13 1uF
R14 150k C14 100uF
R15 10k C15 100n
R16 1k
R17 22k
R18 4k7
R19 470k
R20 47k
R21 1k5
R22 10k
R23 22R
R24 4k7

Shopping List Wolfshirt2020
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Value QTY Type Rating
22R 1 Carbon / Metal Film 1/4W
220R 1 Carbon / Metal Film 1/4W
1k 2 Carbon / Metal Film 1/4W
1k5 1 Carbon / Metal Film 1/4W
4k7 4 Carbon / Metal Film 1/4W
10k 2 Carbon / Metal Film 1/4W
15k 1 Carbon / Metal Film 1/4W
22k 1 Carbon / Metal Film 1/4W
47k 3 Carbon / Metal Film 1/4W
100k 5 Carbon / Metal Film 1/4W
150k 1 Carbon / Metal Film 1/4W
470k 1 Carbon / Metal Film 1/4W
1M 1 Carbon / Metal Film 1/4W
1n 1 Film 16v min.
2n7 1 Film 16v min.
47n 1 Film 16v min.
100n 3 Film 16v min.
1uF 7 Film 16v min.
10uF 1 Electroltyic 16v min.
100uF 1 Electroltyic 16v min.
1n34a 4 or, BAT46
1N4001 1
2n3565 4
On/On 1 PCB Solder Lugs
50kB 1 PCB Right Angle 9mm
50kB 2 PCB Right Angle 16mm

madbeanpedals
Parts Guide Wolfshirt2020
2n3565
http://smallbear-electronics.mybigcommerce.com/transistor-2n3565/
1n34a:
http://smallbear-electronics.mybigcommerce.com/diode-nos-germanium/
BAT46 (1n34a alternative):
http://smallbear-electronics.mybigcommerce.com/diode-schottky-bat46/
SPDT (On/On):
http://smallbear-electronics.mybigcommerce.com/spdt-on-on-short-lever/
16mm Right Angle Pots (50kB):
http://smallbear-electronics.mybigcommerce.com/alpha-single-gang-16mm-right-angle-pc-mount/
9mm Plastic Shaft (50kB):
http://smallbear-electronics.mybigcommerce.com/alpha-single-gang-9mm-right-angle-pc-mount-w-
knurled-plastic-shaft/
Thinline DC Jack:
http://smallbear-electronics.mybigcommerce.com/dc-power-jack-all-plastic-unswitched-2-1-mm/
Enclosed Mono:
http://smallbear-electronics.mybigcommerce.com/1-4-in-mono-enclosed-jack/
http://smallbear-electronics.mybigcommerce.com/1-4-in-mono-enclosed-switchcraft-111x/
Lumberg Mono:
http://smallbear-electronics.mybigcommerce.com/lumberg-1-4-compact-shrouded-mono-jack/

Notes Wolfshirt2020
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• While I do recommend sticking with the stock 2n3565 transistors for this build I used a transistor
package that allows for different pinouts.
For the 2n3565, the attened side of the transistor is the emitter.

Wiring Diagram Wolfshirt2020
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1590B Drill Guide Wolfshirt2020
Note: Drill Guides are approximate and may require tweaking depending on the types of jacks, switches and pots you use.
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• This is a tight t, but should work if you use the Lumberg style 1/4” jacks.
• I don’t recommend using any of the mbp 3pdt boards for this enclosure.

1590B2 Drill Guide Wolfshirt2020
Note: Drill Guides are approximate and may require tweaking depending on the types of jacks, switches and pots you use.
madbeanpedals
• Shown with Softie 2 relay bypass. If you are using one of the mbp 3pdt
bypass boards, or just a 3pdt switch on its own, move the drill spot for the
switch a bit lower so you can t everything properly. Drill only one LED spot!
• Lumberg style jacks are used here but other styles may t using the same drill
locations.

125B Drill Guide Wolfshirt2020
Note: Drill Guides are approximate and may require tweaking depending on the types of jacks, switches and pots you use.
madbeanpedals
• Shown with Softie 1 relay bypass. Use the same drill spot for 3PDT switch or
move to your desired location. Drill only one LED spot!
• Enclosed top jacks are used here, but you should also be able to t open-
frame metal jacks or the Lumberg style.
• You could also use side jacks but you’ll need to move the Softie1 drill spot
down. If you use side jacks with a regular 3pdt instead of the Softie simply
pick your drill spots for the jacks.

Voltages Wolfshirt2020
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• 9.42vDC One Spot
• Current Draw ~ 3mA
Q1 2n3565 Q2 2n3565 Q3 2n3565 Q4 2n3565
C 2.24 C 7.72 C 7.17 C 8.02
B 0.75 B 2.24 B 0.84 B 0.81
E 151mV E 1.61 E 221mV E 202mV

Build Pic Wolfshirt2020
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Schematic Wolfshirt2020
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