PCB Layout ©2016 Pedal Parts Ltd.
If you’re building the circuit without the optional
post-boost, leave out R16-19, C8-9, Q5 and VOL.
Place a jumper as shown in red above.
This connects pin 3 of BALANCE straight to
the OUT pad.
Extra pads have been added for Q1-4 to allow non-
standard pinout transistors to be used. The three
standard pins are configured for EBC pinouts, so
transistors such as 2N3904 and MPSA13 should be
placed to follow the part on the silkscreen. These
are also used in the build in the front cover image.
The extra Emitter pad has been added so you can
use non-standard BCE pinouts, as per the original
circuit (2N5306, BC169B).
The power and signal pads on the PCB conform to
the FuzzDog Direct Connection format, so can be
paired with the appropriate daughterboard for
quick and easy offboard wiring.
Be very careful when soldering the LED,
transistors and diodes. They’re very sensitive to
heat. You should use some kind of heat sink
(crocodile clip or reverse action tweezers) on each
leg as you solder them. Keep exposure to heat to a
minimum (under 2 seconds).
The cathode (striped end) of the diodes go into the
square pad. The anode (long leg) of electrolytic
capacitors go into the square pad. C5 can be bent
over the adjacent resistors to save on height, giving
more clearance when mounting in the enclosure.
Snap the small metal tag off the pots so they can
be mounted flush in the enclosure.
If you’re using a footswitch daugherboard don’t
bother soldering R15. You’ll use that on the
daughterboard instead.
Pots mount on the back side of the board. You can
use vertical-mount pots or just wire up ‘normal’
ones. It’s a good idea to place the pots in their
holes in the enclosure when you’re soldering them
in place on the PCB. That way you know they’re
going to line up ok. Best way to do it is to solder a
single pin of each pot in place, then do a visual
check to see that they’re sitting at the same height.
If not, melt the joints and readjust any that are off.
nce built and tested, adjust the trimmer for your
required amount of octave-up.
E C BE
