Build documentation for:
System X filter
Based on the Roland System 100M VCF
Frequency central
Version 2 / April 2013
B100K B100K A100K B100K A100K A100K
Key to PCB screen print:
n:
This signifies NPN BC547 transistors. Note the correct pinout as shown by the half circles.
p:
This signifies PNP BC557 transistors. Note the correct pinout as shown by the half circles.
f:
This signifies 2N5485 FETs. Note the correct pinout as shown by the half circles. D, S, G is
signified should you want to sub alternatives.
Gnd:
Ground
Please observe the correct polarity of the 2 diodes and 12 electrolytic capacitors. The 10 x
22uF are configured in sets of 2 back to back (negative to negative).