BF-22 SALLEN KEY FILTER V3.3 - ASSEMBLY GUIDE – REV. NOV 17
ELECTROLYTIC CAPACITORS
Values are written on the side of the capacitor. Mind their polarity (The long leg of the
capacitor is the positive (+)).
Qty
Value
Code
Name on PCB
4
10uF
10uF
C3, C4, C7, C8
2
33uF
33uF
C13, C14
2
220uF
220uF
C11, C12
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
4
2N3906
T1, T2, Q9, Q10
2
BF244C
Q8, Q7
MALE PIN HEADERS
Place and solder the male pin headers where the silkscreen indicates (it is the shorter pins
that you are soldering).
POWER CONNECTOR
Solder the power connector at “POWER IN”, ensuring it is facing out from the edge of the
PCB. The small arrow on the connectors must be on the side with the thick white line.
Buen trabajo! Do you think a 15 minute break would better prepare
you for the rest of the build (this is a big one!)? Then.. go for it!!
Prove someone wrong in internet (for example)
3
