Frequency Central Raging Bull 2.0 Build Documentation

Frequency central
Raging bull 2.0
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Rev 2.0 PCB uses a TL072 instead of an LF351. The additional opamp stage is use to increase
the output level of the module.
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There are also a couple more resistors (1K and 33K) and a 10uF capacitor is replaced with a
220uF capacitor.
10K Lin
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.
The PCB shows the correct orientation for BC547/BC557. Other transistor types can be used (eg
2N3904/2N3906), but please observe the correct pinout.
Please observe the correct polarity of the electrolytic capacitors.
Gnd: ground connection between PCB and all sockets
In 1: wire to Audio1 socket
In 2: wire to Audio2 socket
Out: wire to output socket
CV1, VCA, +12V: wire to VCA CV source select switch
CV1: wire to CV1 socket
CV2: wire to CV2 socket
Build documentation for:
Based on the legendary Moog Taurus Mk I VCF and VCA.
10K Lin 50K Rev Log 10K Lin 10K Log 10K Log