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AfterBlaster - Build Instructions
The AfterBlaster is a cool THREE-IN-ONE circuit that provides several useful functions. It is a handy bypass footswitch wiring
board with a status LED. It has a switchable boost circuit that provides a clean boost enhancement for any circuit. It can also
provide a final tone balancer to attenuate the output level of any circuit. Or anything in between!
Add an extra gain stage to any circuit and more
.
The DIP switches and trimmer must be installed on the opposite side of the PC board from the other components and footswitch. See the views
below. The left view should be facing up when viewing the gut shot of the pedal. DIP SWITCHES are usually available in our
PARTS LIST
Build Notes:
*
Be sure to Socket R4
– See build notes below for details. 2.4k is only an average value to get MPF102, J113 or 2N5457 close to the
wanted 4.5v to 6v reading on the Drain leg of Q1. Google for the Datasheet for whatever transistor you are using.
** Q1
- You may use a J113
(MPF102 replacement) or change to a 2N5457 for more grit, however 2N5457 will require an
adjustment to the value of
R4
. Use a
DMM
and switch to
DCV.
Black Probe on ground and Red on the Drain of Q1. Adjust your
socketed R4 value
till you get a reading between 4.5v to 6v on the Drain of Q1.
This is easy but important to get the best tone.
*** R5
is the CLR (current limiting resistor. Adjust this value to suit for brightness. Between 1k8 and 4k7 Bright to Dim.
