FuzzDog Ruby/NoisyCricket User manual

Ruby / Noisy Cricket
A couple of saucy
little amps
Contents of this document are ©2020 Pedal Parts Ltd.
No reproduction permitted without the express written
permission of Pedal Parts Ltd. All rights reserved.

Important notes
If you’re usin any of our footswitch dau hterboards,
DOWNLOAD THE DAUGHTERBOARD DOCUMENT
•Download and read the appropriate build document for the daughterboard
as well as this one BEFORE you start.
•DO NOT solder the supplied Current Limiting Resistor (CLR) to the main
circuit board even if there is a place for it. This should be soldered to the
footswitch daughterboard.
POWER SUPPLY
Unless otherwise stated in this document this circuit is designed to be
powered with 9V DC.
COMPONENT SPECS
Unless otherwise stated in this document:
•Resistors should be 0.25W. You can use those with higher ratings but
check the physical size of them.
•Electrolytics caps should be at least 25V for 9V circuits, 35V for 18V
circuits. Again, check physical size if using higher ratings.
LAYOUT CONVENTIONS
Unless otherwise stated in this document, the following are used:
•Electrolytic capacitors:
Long leg (anode) to square pad.
•Diodes/LEDs:
Striped leg (cathode) to square pad. Short leg to square pad for LEDs.
•ICs:
Square pad indicates pin 1.

Schematic RUBY
R1 1 5
R2 3K9
R4 10R
C1 47n
C2 100n
C3 Empty
C4 47n
C5 Empty
C6 100n
C7 100u elec
C8 220u elec**
Q1 2N5457*
IC1 L 386-N1
VOL 10KB
GAIN 1KB
*Other FETs will work, such
as J201. This section is
working as a buffer and will
have little bearing on the
tone. Pads are provided for
through-hole or S T FETs.
**We’ve been building these
for years will 100u at the
output. It’s plenty bassy.

Schematic NOISY CRICKET
R1 1 5
R2 3K9
R4 10R
C1 47n
C2 100n
C3 100n***
C4 47n
C5 100n
C6 100n
C7 100u elec
C8 220u elec**
Q1 2N5457*
IC1 L 386-N1
VOL 10KB
GAIN 1KB
TONE 100KB***
GRIT SPDT ON-ON
*Other FETs will work, such
as J201. This section is
working as a buffer and will
have little bearing on the
tone. Pads are provided for
through-hole or S T FETs.
**We’ve been building these
for years will 100u at the
output. It’s plenty bassy.
***To build it without the
tone control simply leave out
these parts.
No jumpers required.

Be very careful when soldering Q1. FETs are 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). Same goes for the IC if you aren’t
using a socket.
You need to remove anything that’s sticking out
of the 9mm pot other than the three PCB pins. It
should snip off easily with wire cutters.
You should solder all other board-mounted
components before you solder the pots. Once
they’re in place you’ll have no access to much of
the board. ake sure your pots all line up nicely.
The best way to do that is to solder
a single pin of each pot in place then melt and
adjust if necessary before soldering in the other
two pins. Don’t push the pins all the way into the
PCB - give yourself 1-2mm of wiggle room on
the pot height if you’re going to be adding the
toggle switch.
If you’re wiring your pots, the square pad is pin 1.
PCB layout ©2020 Pedal Parts Ltd.
These need to o away.

Enclosure layout
Of course you can lay it out however you like, but it was designed for this configuration in a 1590B.

Wiring
This configuration, using a TRS input jack, will disconnect the battery when the
jack is unplugged. However, if you have a DC supply connected it will be on all the
time. You can add an on/off switch inline with the ground wire between the DC
socket and the PCB - see bottom.

18mm15mm 22mm21mm
21mm 21mm
18mm
Drilling guides - 1590B
Pots are 7mm, toggle switch is 6mm. However, adding 1mm to each will make for less
headaches when boxing up your circuit.
Jacks are normally 10mm, DC socket is 12mm.
This layout will give you space between the DC and output jack to fit a PP3 battery.
This templates are rough guides only. You should ensure correct marking of your
enclosure before drilling. You use this template at your own risk.
Pedal Parts Ltd can accept no responsibility for incorrect drilling of enclosures.
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