Lithium Grim Divine Fuzz Instruction Manual

1
Divine Fuzz
Building instructions
V1.0

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Table of contents
Components...........................................................................................................................................3
General guideline for components.........................................................................................................4
General building tips ..............................................................................................................................4
Modifications .........................................................................................................................................4
Off board wiring .....................................................................................................................................5
Biasing....................................................................................................................................................6
Troubleshooting .....................................................................................................................................6
Schematic...............................................................................................................................................7
NB
Fuzz effects are known to be more sensitive to other effects in the effects chain than most
other effects. So, when testing the effect, also check its placement in your effects chain.
Secondly this Fuzz effect is more sensitive to lower quality components, so you should
source your components from a reliable source!

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Components
Part
Value
Comment
Part
Value
Comment
C1
2u2
R4
180R
C2
22u
R5
1K
C3
100n
MKT
R6
470R
C4
2n2
MKT
R7
100K
C5
100n
MKT
R8
1M5
C6
56p
Ceramic
R10
100K
C7
1n
MKT
SW1
DPDT
Wrath (footswitch)
C8
100u
SW2
SPST
Treble boost
D1
1N4001
SW3
SPST
Gain boost
Q1
BC109B
Socket
VR1
A25k
Sputter (log)
Q2
BC109C
Socket
VR2
B1M
Wrath (linear)
R1
1K
VR3
A100K
Fuzz (log)
R2
100R
VR4
A100K
Volume (log)
R3
1K
VR5
10k
BIAS Trimpot

4
General guideline for components
Capacitors: All values under 1nF should be ceramic disks. From 1nF up to 1uF should be MKT
(foil/metalfilm capacitors) and over 1uF use electrolyte caps (or tantalum) 16V+ rated and
watch out for polarity!
Resistors: use 1% metalfilm for the best results.
Socket all transistors. This way you can easily mod them or replace them if they break.
General building tips
Soldering this board can be complicated for some people since the solder pads can be very close
together. Use a magnifying glass to make the job easier.
Start by soldering the resistors (but not yet VR5)and diode. D1 is optional so if you do not want it,
short it with a lead. Solder the small ceramic capacitator C6 next. C6 fits both ceramic as well as MKT.
Always insert one leg of the capacitator in the bottom mounting hole and the other leg in one of the
other two mounting holes. If you want to experiment with other transistors, you should now solder
the sockets for Q1 and Q2.
Now solder the MKT capacitors and the electrolyte capacitors. C1 is made to fit both MKT as well as
electrolyte. The polarity is (bottom to top) - + + for the three mounting holes (see page 3). Solder
the Bias trimpot VR5.
Place the transistors and you are almost ready to rock. The BC109’s are metal can transistors. Please
consult the datasheets for correct pinning.
SW1 should be a footswitch, SW2 and SW3 are mini switches and can also be SPDT. The remaining 3
legs of SW1 can be used to add a LED to the Wrath switch. To do that just look at how the status LED
is connected in the off board wiring on page 5 and copy that. If you prefer to let the LED turn on in
the other position then just move the grey cable on pin 3 of the switch to pin 1.
Besides the components mentioned in the table on the first page, you will need:
2 input jacks. 2 mono jacks if you are not going to use a battery but only the 9V adapter. 1
mono (for output) and 1 stereo jack (for input) if you will be using both a 9V battery and the
9V adapter.
3PDT footswitch (9 pins). I also carry an easy off board circuit for true bypass.
2,1mm DC jack (isolated).
9v battery clip (optional).
2 LED’s.
22 gage stranded hook-up wire.
Hammond 1590BBcase (or similar) in your favourite colour.
Modifications
It is reported that changing the value of R10 to 12K makes is sound better.
Instead of the BC109B you can experiment with other transistors like the 2N2222A.
Originally the values of C4 and C6 are switched (see schematic on p. 7). If you want that you
can switch them back, but most prefer the current setup.

5
Off board wiring
Tip
Tip
Ring
Output Jack
Input Jack
Cathode (short leg)
Anode (long leg)
Footswitch
S
Sleeve
R led
Ring
R led
NB. If you do not want to use the D1 diode than remember to short it by soldering a lead instead.
NB 2. You are free to use any ground connection you want on the PCB (GND) if the sequence as
mentioned in the picture above does not match your build.
Notice that in the “off” position the effect input is connected to ground to prevent possible
oscillation.
The LED requires a resistor (R led in the diagram) depending on the type of LED you are using. An
ultra-bright red or blue LED requires a 4k7 resistor, Green requires 680R.
Blue = pin 1
White = pin 2
Yellow = pin 3

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Biasing
This layout requires high grade potmeters, capacitators and trimpot to work as expected. The
trimpot is used to bias the transistors Q1 and Q2. Start in the middle position and experiment which
setting suits your tonal taste best. Also test it with Wrath on and off. If you only get squealing then
adjust the trimpot. Remember that the squealing/oscillating is part of the effect with the Wrath
setting engaged, just the amount of squealing should be set to your own liking! This effect takes time
to get to know it and finding your tone. Sputter and Wrath also influence each other’s behaviour so
also experiment with that.
Troubleshooting
All PCB’s have been e-tested 100% in the factory, so there should not be a connection problem on
the PCB itself.
The board is not working (at all), what now?
Check if your 9V is plugged in correctly (and/or soldered correctly on the board).
Check that you oriented the capacitors, IC’s ,transistors and diodes the right way. MKT
capacitors and resistors do not need to be oriented.
Check if you used the correct values of the components. For resistors you can look here:
http://www.diyaudioandvideo.com/Electronics/Color/
Double and triple check your soldering! A lose or cold solder can be really bad for your board.
Replace the IC’s and transistors, one might be defective. Before doing that first unplug the 9V
and wait 5 seconds.
Check that you have good/high grade components. A lot of Chinese sourced parts are fakes
(especially high end opamps and transistors) so be careful that you source your parts from
reliable suppliers.

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Schematic