BF-22 SALLEN KEY FILTER V3.3 - ASSEMBLY GUIDE – REV. NOV 17
CAPACITORS
Qty Value
Code
Name on PCB
2
1nF
102
C102, C103
6
100n
104 C100, C101, C104, C105, C106, C107
TRANSISTORS
Be sure they are orientated correctly. The curved and flat sides of the silkscreen outline of
the transistor on the PCB must match that of the transistor’s body.
Qty Value
Name on PCB
2
2n3906
T100, T101
TRIMMERS
Solder the two 100k trimmers at “CUTOFF_INIT_A” & “CUTOFF_INIT_B” ensuring the screw is
facing away from the edge of the PCB.
FEMALE PIN HEADERS
lace the female pin headers over the silkscreen markings at positions “TO_CON_A”, &
“TO_CON_B” and solder to the PCB.
OPEN CONTROL BOARD BAG B
SPACERS
Secure the spacers onto CONTROL PCB (through the holes with silver outlines) with the main
body of the spacer on the component side, and the nut on the opposite.
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