Elecraft K3 Assembly Manual - Manual (Page 64)

63
KBPF3 General Coverage Receive Option
If you have the KBPF3 General Coverage Receive option kit, install the board as follows. Otherwise skip this
section and go directly to Power Amplifier Jumper Block on page 64.
KBPF3 Description
The KBPF3 extends the receive coverage outside of the Ham bands over the range of 500 KHz to 30 MHz and
from 48 MHz through 54 MHz. Only the receiver coverage is extended. The transmitter frequency coverage is
not affected.
KBPF3 Installation Procedure
Install the board on the standoffs you installed earlier as shown in Figure 89. The screws and lock washers
needed are supplied with your KBPF3 Option kit. There are three connectors on the bottom of the KBPF3 board
that must be properly mated to P44A, P44C and P44E on the RF board. Even though the connectors are hard to
see if they KPA3 shield is installed, they can be aligned as follows:
Set the KBPF3 board in place over the standoffs, aligning it so the holes in the KBPF3 board
are aligned with the tops of the standoff. This will align the connectors.
Press down on the KBPF3 board to mate the connectors at the end near battery BT1 and along
the side nearest the LPA board or, if installed, the KPA3 shield, 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 KBPF3 board should rest on top of the standoffs and be parallel with the RF board
underneath.
Figure 89. Installing the KBPF3 Option Board.