Elecraft K3EXREF - Manual (Page 9)

9
Installing the K3EXREF Board
Temporarily remove the coaxial cables at J2 and (if present) J1 on the KREF3 board. Handle the
connectors by the grip (see Figure 6). Do not pull on the black coaxial cable.
Figure 6. TMP Cable Connectors.
Carefully remove the mounting screw and washers holding the KREF3 board (see Figure 7). As you loosen
the screw tilt the top of the KREF3 board away from the front panel shield and look for a split lock washer
between the front panel shield and the KREF3 board. If present, remove it with your needle nose pliers.
Figure 7. Removing the KREF3 Hardware.
Check the K3EXREF board and, if not already present, install the shorting block across the center pins of
J1 (see Figure 8.)
Figure 8. Shorting Block Installed on J1.