Flender - Fuzz Dog`s Pedal Parts

Flender - Fuzz Dog`s Pedal Parts
Flender
Crazy, intense fuzz with blend
control to keep things sane
PedalParts.co.uk
Schematic
TONE BOOST CONFIGURATIONS
BOM
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
R20
R21
R22
R23
R24
R25
R26
R27
R28
R29
15K
150K
560K
47K
1K5
120K
10K
680R
220K
150K
8K2
8K2
27K
27K
100K
10K
820R
27K
3K9
10K
100K
18K
150K
47K
820R
10K
3K9
2K2 (CLR)
2K2 (CLR)
ORIGINAL
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
C16
C17
100n
47n
100n
10u elec
10u elec
10u elec
10u elec
10u elec
10u elec
100n
3n3
10u elec
1n
10u elec
10u elec
100u elec
100n
REISSUE
Main schematic shows all the switch
connections and the pads to build the
two different tone boost configurations,
which are shown above. More later...
*Other transistors can be used.
Q1-5
2N5088*
D1
D2-5
1N4001
1N34A
BLEND
SUSTAIN
TONE
LEVEL
100KB
10KA
20KB
50KA
SW1-2
3PDT FOOTSW.
Snap the little metal tag off the pots to mount them flush in the box.
You MUST use some kind of heat sink on the legs of the diodes and the transistors when
soldering. They aren’t keen on heat. Any more than 3-4 seconds of iron and they’re toast.
ALL the components mount on the top side of the board.
It’s a good idea to run the pot wires from the back of the PCB
(opposite side to the components) in order to ensure plenty of
clearance for the jack sockets when assembling. Make sure you give
yourself plenty of length on the wires so assembly isn’t tight.
The pads marked in RED above are to select your Tone Boost
configuration. You could add header pins and use jumpers to select
between them, but its easy enough to just use jumper wires.
Honestly, the Reissue configuration sucks - there’s a big volume drop.
Just go with the original.
ORIGINAL
REISSUE
FOOTSWITCHES
LEDs
Leave these out until you’re
boxing it all up - see later.
Make sure you orientate them with the
tags horizontally as shown. Its a good
idea to put the them
in place in the
enclosure and
loosely tighten
them, then place the
PCB on top to get
the position right
before soldering.
1
2
3
WIRING FOR TESTING
Connect everything up but the LEDs. That includes the footswitches.
Ensure your power supply is 9V Tip Negative, or connect up a battery for
now. If connecting a battery, solder long lengths of wire to the +V and GND
pads on the PCB, then attach the battery to the other end of these. This
saves desolding stuff from the board, which is a pain.
JACK SOCKETS
DC SOCKET
+V
SIGNAL
GND
GND
SIGNAL is JACK IN and
JACK OUT on the PCB.
Each socket has its own
GND connection
conveniently placed.
Ignore the third tag
- you only need that
if wiring up for
battery.
Plug in. Go!
If it works, crack on and get it in the box. If not, troubleshoot. Check you
have everything in the right place and reflow any poor joints.
BOXING UP
There’s plenty of space in there, but you may need to turn the jack sockets
one way or the other to ensure you clear the PCB.
Turn your pots as shown to clear the jack sockets.
What about my LEDs?
Pre-drilled enclosures are supplied with 3mm holes for the LEDs, rather than
larger ones that require a mounting bezel. Why? Because you can hold the LED
securely in place with the PCB. When you come to box up your lovely new circuit,
get the pots in place first. Then the jacks. Now, slide your LEDs all the way into
the PCB (short leg to square pad) and bend the legs ever so slightly so they don’t
fall out. Alternatively put a little bluetac on there. Now locate your footswitches
into place and tighten.
When everything is secure, let your LEDs slide down into the holes - use some
needle-nosed pliers or skinny fingers to position them fully in the holes. I won’t
kid you, its a little fiddly but worth it for the neat finish you’ll get.
No bezel = happy pedal.
Once in place, solder. Those little lights aren’t going anywhere!
Hang on - there’s an extra pad next to the Tone Boost LED. Yes - you can use a
common-cathode tri-colour LED if you like, to show a different colour depending
on selection, rather than the standard on-off with a normal LED.
Drilling template - 1590B
Please check positioning before drilling - those holes are your responsibility
and these templates are just a guide. Pots are spaced 27mm.
Recommended drill sizes:
Footswitch, DC
12mm or 13mm with wiggle room
Jack sockets
9.5-10mm
Pots
7mm
PedalParts.co.uk
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