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. Check the separate daughterboard
document for details.
Be very careful when soldering the transistors
if you aren’t using sockets (why not?). 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).
Snap the small metal tag off the pots so they
can be mounted flush in the box.
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.
Trimmers should mount on the same side of
the PCB as the pots, as shown.
Once everything is soldered in place you
need to adjust the trimmers to bias the
transistors. Q1 is fixed bias, but you
adjust T1 and T2 to change the voltages
on the collectors of Q2 and Q3 respectively
(marked above).
There are no definitive ‘correct’ voltages, but
you should be in the ballpark of:
Q2 - 1.0 - 1.75V
Q3 - 8.0 - 8.5V
Set Q2’s bias first before tweaking Q3, as the
T1 trimmer will affect both.
It’s a case of tweaking by ear within those
ranges until you get the sound you want.
Sweet, sustained fuzz without gating.
PC
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