FuzzDog Blaster! User manual

Blaster!
Clone of the
Alembic tratoblaster boost
PedalParts.co.uk

chematic
BOM
R1 100R (68K*)
R2 22K
R3 12K
R4 100K
R5 1M
R6 2K2 (CLR)
C1 10u tantalum
C2 1u5 tantalum
C3 100u electrolytic
Q1 JFET (2N5457, J201)
POT 50KB (50KC**)
*Original value - smaller value is less intrusive.
** Reverse log gives better control if you can get it

The PCB is designed to have the boost pot mounted
directly. You can use wire if you like - simply
connect the board pads to the corresponding pins
on the pot.
Wiring shown overleaf will disconnect the battery
when you remove the jack plug from the input, and
also when a DC plug is inserted.
nap the little metal tag off the pot to mount it flush in the box.
You MU T use some kind of heat sink on the legs the transistor
when soldering. They aren’t keen on heat. Any more than 3-4
seconds of iron and its toast.
Recommended assembly order:
Resistors, Caps, Transistors, Pot, Wires
1 2 3

Test the board!
Once you’ve finished the circuit it makes sense to test is before
starting on the switch and LED wiring. It’ll cut down
troubleshooting time in the long run. If the circuit works at this
stage, but it doesn’t once you wire up the switch - guess what?
You’ve probably made a mistake with the switch.
older some nice, long lengths of wire to the board connections for
9V, GND, IN and OUT. Connect IN and OUT to the jacks as shown.
Connect all the GNDs together (twist them up and add a small
amount of solder to tack it). Connect the battery + lead to the 9V
wire, same method. Plug in. Go!
If it works, crack on and do your switch wiring. If not... aw man. At
least you know the problem is with the circuit. Find out why, get it
working, THEN worry about the switch etc.
YRET
T
A
AT
B
NI
UO
TU

Wire it up
The Board GND connections don’t all have to directly attach to the
board. You can run a couple of wires from the DC connector, one to the
board, another to the IN jack, then daisy chain that over to the OUT jack.
It doesn’t matter how they all connect, as long as they do.
This circuit is standard, Negative GND. Your power supply should be Tip
Negative / leeve Positive. That’s the same as your standard pedals
(Boss etc), and you can safely daisy-chain your supply to this pedal.
Now... GO BLA T OME TRAT!
PedalParts.co.uk
L
E
D
BOARD
OUT
BOARD
9V
BOARD
GND
BOARD
GND
BOARD
GND
BOARD
INPUT
BATTERY
+
IN
OUT
L
E
D
BOARD
GND
BOARD
LED+
+