Frequency Central MU System X Dual Amplifier Build Documentation
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Frequency Central MU System X Dual Amplifier Build Documentation

Based on the roland system 100m vca. mu system x dual amplifier features: main pcb, sockets pcb x 12
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Frequency central
Build documentation for:
MU system X
Dual amplifier
Based on the Roland System 100M VCA. MU System X Dual Amplifier features:
Main PCB, Sockets PCB x 12
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.
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.

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Summary of Contents for Frequency Central MU System X Dual Amplifier

  • Page 1 Build documentation for: MU system X Dual amplifier Based on the Roland System 100M VCA. MU System X Dual Amplifier features: Main PCB, Sockets PCB x 12 Key to PCB screen print: n: This signifies NPN BC547 transistors. Note the correct pinout as shown by the half circles.
  • Page 2 Bill of Materials 560R x 4 47pF x 2 LM13700 x 1 A100K x 2 1K x 4 10nF x 2 TL072 x 1 3K3 x 2 22uF x 8 BC547 x 4 B100K x 4 6K8 x 2 47uF x 4 BC557 x 4 8K2 x 2 2N5485 x 2...
  • Page 3 Main PCB assembly - FRONT Solder all resistors. 2. Solder all IC sockets 3. Solder all non-electrolytic capacitors 4. Solder all transistors 5. Solder the 6 x Alpha pots and the two switches. Make sure they fit snug to the PCB. Main assembly –...
  • Page 4 Socket PCB 1. Solder the 12 sockets to the 12 Socket pcbs, socket sits on it’s silkscreen footprint Final Assembly 1. Present the pcb to the panel, and bolt the two together using the washers and nuts for the pots and switch 2.

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