Elecraft W2 Watt-meter Manual - Manual (Page 14)

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Mount 2D fasteners with 3/16” (4.0 mm) black pan head screws at each end of the rear panel cover as
shown in Figure 10 (A). Install one fastener at each end of the panel. Do not use lock washers.
Mount 2D fasteners with 3/16” (4.0 mm) black flat head screws at each end of the front panel cover as
shown in Figure 10 (B). Install one fastener at each end of the panel. Do not use lock washers.
Figure 10. Mounting Front and Rear Panel 2D Fasteners.
Clean the paint from around the holes on the inside (flat) side of the side panels as needed to ensure good
electrical contact with the 2D fasteners when they are mounted. Note that there is a left and a right side panel.
They are not interchangeable because of the beveled holes for flat-head mounting screws. Be sure to scrape the
paint only from the flat, inside surfaces as shown in Figure 11.
Figure 11. Preparing the Side Panels for Mounting.