Elecraft KXV3 Manual - Manual (Page 7)

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Figure 1. Removing K3 Top Cover.
CAUTION:
Touch an unpainted metal ground or wear a grounded wrist strap
before touching components or circuit boards inside the K3. See Preventing ESD Damage on
page 4 for more information.
Removing the KRX3 Subreceiver Module
If your K3 is equipped with the optional KRX3 Subreceiver, you must remove the subreceiver module to install
the KXV3. The KRX3 subreceiver module is the “L” shaped metal enclosure (see Figure 2). Remove the
subreceiver module as follows:
Remove the chassis stiffener bar that runs across the top of the K3 chassis and is attached to the side panels.
If the KPA3 is installed, the stiffener will be attached to the KPA3 shield by two screws. These screws may have
nuts and lock washers or they may thread into permanently-attached PEM nuts on the stiffener bar.
Remove the two 1-1/2” (38 mm) screws and lock washers shown in Figure 2. These screws extend all the
way through the KRX3 module and secure it to standoffs mounted on the main RF board that fills the bottom of
the K3.
Figure 2. Removing the KRX3 Module.