Elecraft W2 Watt-meter Manual - Manual (Page 12)

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Remove the screw holding the spacer between U3 and the pc board and mount the bottom cover as shown
in Figure 7. Be careful not to dislodge the spacer. If it falls out, you must remove the cover and replace it as
shown in Figure 2.
Figure 7. Mounting Bottom Cover.
CAUTION
Do not put stress on the pc boards when installing the screws in the following step.
Secure the bottom cover with four 3/16” (4.0 mm) black pan head screws. No lock washers are used. Note:
It is best not to tighten the screws until the enclosure is fully assembled so the panels can move slightly as
needed for best alignment. This is a good practice to follow when installing all of the outer case
components.