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Note the notch cutouts silkscreened on the rear corners of the main printed circuit board
(13) Install 1/2” No.6 threaded standoffs at the six locations (five along the sides, and
one behind J112, the 8-pin RJ45 jack) on the bottom side of the circuit board. Use a 6-32
x 1/4” machine screw and a #6 internal lockwasher under each screw head. Tighten the
screws securely.
(14) Plug six-inch 26-conductor flat ribbon cables into headers P101 and P103. As shown
below, orient the cables so that one flat cable emerges out of header P101 toward the
front edge of the circuit board, while the cable from P103 points toward the rear edge of
the circuit board.
Important: Make certain the connectors are aligned properly with their
mating pins on the headers, and are not inadvertently offset
. Leave the other ends of the
cables free.
Be certain the ribbon cables are not not accidentally offset from the pins in their mating connectors
(15) Set aside the completed main printed circuit board. Note that if you selected the
default amplifier keying circuit, then no components are installed at (R101), (Q102), and
(D108).
