Installing The Kbpf3A Board On The Rf Board - ELECRAFT K3S Installation Instructions Manual

Installing the KBPF3A Board on the RF Board

There are three connectors on the bottom of the KBPF3A board that must be properly mated to P44A, P44C and
P44E on the RF board (see Figure 13). Even though the connectors may be hard to see as they are mated,
especially if the amplifier shield is installed, they can be aligned as follows:
Set the KBPF3A board in place over the standoffs, aligning it so the holes in the board are aligned with the
screw holes in the tops of the standoffs. This will align the connectors.
Press down on the board to mate the while checking to ensure that the holes in the board are aligned with
the holes in the standoffs. Note that simply installing the mounting screws will not ensure the 3-pin
connectors are fully mated. When properly mounted the board should rest on top of the standoffs and be
parallel with the RF board underneath.
Attach the board with a 4-40 1/4" (6.4 mm) zinc pan head screw and lock washer at each standoff as shown
in Figure 13.
Figure 13. Mounting the KPBF3 Board.
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