Elecraft KPA500 Kit Assembly Manual - Manual (Page 31)

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There are five wires remaining connected to the power supply module: two red, two black, and one white.
One red and one black wire are longer than the others. Route the longer red and black wires around the end of
the Z-bracket and connect them to the 60V and GND terminals on the PA/LPF Module as shown in Figure 43.
Figure 43. Connecting the 60V and GND Wires to the PA/LPF Module.
Connect the three remaining wires to the rectifier board mounted at the end of the Z-bracket as shown in
Figure 44. Each spade connector is marked with the color of wire it receives. Route the black wire over the red
and black wires passing around the end of the Z-bracket to keep them in place. They cannot be allowed to pass
over the top of the Z-bracket or they will interfere with installing the top cover later.
Figure 44. Wiring the Rectifier Board.