Elecraft KX3-4M - Manual (Page 21)

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Install the local oscillator cable as follows:
If you have difficulty with the following steps to mate the ultra miniature
coax connectors, a short video is available on the Elecraft web site at:
http://www.elecraft.com/KX3/kx3.htm . Scroll down to UMCC Connector
Montage near the bottom of the web page.
Locate the coaxial cable with a miniature connector on each end. Plug one end of the cable into J4 on
the KX3 RF board as follows:
 Shape the end of the cable as shown in Figure 13 to it can be easily placed directly onto J4.
 Carefully align the cable over the connector and press down on the connector. It will require
significant force to mate the connectors, especially when they are new. Press on the connector
directly over J4 using a plastic tool such as a pen (see Figure 14) .Take care to press directly on the
back of the connector above J4. You will hear and feel a distinct “snap” when they are mated and,
of course, the connector will resist being pulled off of J4.
Figure 13. Mating the Ultra Miniature Coaxial Connector at J4.
Turn the coaxial connector as shown in Figure 14 so the metal part cannot touch C180 on the printed
circuit board. If the connector is properly mated you can rotate it without the connector disconnecting.
Route the coaxial cable toward the end of the KX3 that has the antenna connector as shown.