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Select one of the 7” pieces with a remaining black wire (and no red wire). 
Solder it into TB11’s LT terminal. Insert it from the component side and 
solder it on the solder side.
 
Cover the accompanying drain wire with ½” of the outside gray jacket 
material. Solder the drain wire into TB11’s GND terminal. Insert it from 
he component side and solder it on the solder side.
 
Select the other of the 7” pieces with a remaining black wire (and no red 
wire). Solder it into TB9’s LT terminal. Insert it from the component side 
and solder it on the solder side.
 
Cover the accompanying drain wire with ½” of the outside gray jacket 
material. Solder the drain wire into TB9’s GND terminal. Insert it from the 
component side and solder it on the solder side.
 
Select the other of the 9” wire that has black, red, and drain wires on both 
ends. Insert the wires from the component side and solder them on the 
solder side: 
1.  Red wire to TB8 RT terminal. 
 
Black wire to TB7 LT terminal..
 
Cover the accompanying drain wire with ½” of the outside gray jacket 
material. Solder the drain wire into Drain wire to TB7 GND terminal. 
Insert it from the component side and solder it on the solder side.
 
Install Input Selector Power Wiring 
These steps refer to the gray jacketed wires and green wire that connect to TB3 of the 
power supply board. 
12V power and AGND to the Input Selector
Remove ¼” of insulation from the red wire.
Tightly twist the red wire strands, then tin them.
Remove ¼” of insulation from the black wire.
wire strands, then tin them.
¼” of insulation from the green
wire strands, then tin them.
Insert the tinned green wire into the GND hole of the input selector’s 
TB13. Insert the wire into the solder side of the PCB, and solder it on the 
 
Insert the tinned red wire into the POS12 hole of the input selector’s TB13. 
Insert the wire into the solder side of the PCB, and solder it on the 
 
Insert the tinned black wire into the NEG12 hole of the input selector’s 
TB13. Insert the wire into the solder side of the PCB, and solder it on the 
 
Install the Op-amp Integrated Circuits into the Sockets 
You’ll find that the pitch of the rows of IC pins will be a bit wider than the pitch of the 
rows of socket pins. You have to bend the rows of pins in from the sides to make the IC’s