Elecraft K3 Assembly Manual - Manual (Page 58)

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Install the shield over the speaker magnet as shown in Figure 79.
Figure 79. Installing Speaker Magnet Shield.
KPA3 Shield
If you are not planning to install the KPA3 module at this time, skip this section and go directly to Bottom Cover
on page 59. Only the KPA3 shield is installed at this time to avoid rework later. You will be directed to finish
installing the KPA3 module after initial testing and calibration of your K3.
KPA3 Shield Description
The KPA 3 Shield is part of the optional KPA3 100-watt amplifier module. It isolates the high-level RF circuits
in the KPA3 from the rest of the K3 and provides mechanical support for the amplifier module itself.
KPA3 Shield Installation Procedure
Remove the shield from the KPA3 Option kit and position it over the holes in the RF board as shown in
Figure 80. The holes in the shield must line up with the holes in the RF board.
Figure 80. Positioning the KPA3 Shield.