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 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).
Be very careful when bending the legs of the
germanium diodes in D07 cases. The glass casing
is very brittle where the leg enters it. You should
grip the leg with some fine needle-nosed pliers
pushed right against the glass body, then bend the
leg with your fingers. The pliers will take the strain
away from the body.
The cathode (striped end) of the diodes go into the
square pads. The anode (long leg) of electrolytic
capacitors go into the square pads.
You should get all the components in the top side
of the board before soldering in the pots - once
they’re in place you’ll have no access to some of
the components without bending them out of the
way - you can only do that so many times before
the legs snap.
As the rotary is much deeper than the pots you
should line everything up carefully before
soldering. Vertical mount pot pins will only just
reach the PCB when flush with the switch. Use the
enclosure as a guide.
The rotary switch has a small plastic locator tab on
the top side - line this up with the symbol on the
pcb. It should be right next to the edge of the PCB.
If your rotary switch has more than four positions
(three clicks) when you turn it, you’ll have to adjust
it. Take off the nut and anti-vibration washer and
you’ll see another washer with a locator tab which
is inserted into a hole in the switch body. Move that
locator tab into the third hole from the left. You
should now only have four positions on your turn.
FETS
The PCB has an extra pad next to Q1 to allow FETs
with different pinouts to be used. If you’re going for
something with standard DSG pinout, such as J201
or 2N5457, they should be inserted exactly as
indicated on the screen print. 2N3819 have a SGD
pinout, so imagine you’re inserting it into the
normal pads, then move it across one pad so the
right hand pin goes into the extra pad marked D.
<< “Normal”
2N3819 >>
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