WhitakerAudio JC Whitaker 20 W Stereo Integrated Audio Amplifier, Manual

Page: 124 / 196

124
WhitakerAudio
– Twist the blue and black wires together. Route to the rear of the chassis using the available
cable clamps along the left channel PWB.
– Attach quick-disconnect terminals to the free ends of the blue and black wires.
– Using the available tie-wraps, organize the wiring between the rectifier PWB and the left
channel PWB.
– Examine SW203, the over-temperature sensor. Aside from the vacuum tubes, the
component that generates the most heat is the power transformer. SW203 will therefore be
mounted adjacent to power transformer T51. Loosen one of the rear-facing mounting
screws on T51. Do not remove the nut. Slide the open mounting tab of SW203 under the
nut and tighten.
– Prepare two 15-inch long #22 white wires. Attach quick disconnect terminals to one end
of each wire. Connect the free ends of the wires to the temperature sensor, SW203. If
desired, short pieces of heat-shrink tubing may be placed over the connection points.
Solder. Twist the wires together.
– Prepare a 14-inch long #22 black wire. Attach a quick-disconnect terminal to one end of
the wire. Attach to the GND post in the center of the power management PWB. The other
end of the wire will be connected later.
– Prepare a 17-inch long #16 stranded white wire. Attach quick-disconnect terminals to each
end of the wire. Connect one end to the neutral load terminal of filter FL51. Use a pair of
long-nose pliers to make the connection. Connect the other end of the wire to the
ACneutral post on the power management PWB. Route the wire through the nearby cable
clamp.
– Prepare an 18-inch long #16 stranded white wire. Attach quick-disconnect terminals to
each end of the wire. Connect between the N-1 post on the right channel PWB and the
LoadN post on the power management PWB. Route the wire through the nearby cable
clamp.
– Prepare an 18-inch long #16 stranded black wire. Attach quick-disconnect terminals to
each end of the wire. Connect between the hot terminal of filter FL51 and the AChot post