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Page 82
CHAPTER TWELVE
SECTION 12.3
ELEMENT SUPPORT TUBE PREPARATION (continued)
ATTACH FOAM PLUG HOUSINGS TO NON-LOOP TELESCOPING POLES
Each 20m-6m telescoping pole tip requires a breathable foam plug to allow for venting of the EHU. The
foam plug assembly (PN 70-1007-01) consists of a special UV resistant foam plug material, and a plastic
housing as shown in
figure 12.30
.
The foam plug is installed inside the plastic housing at the factory. No trimming or chamfering is re-
quired for the 20m-6m telescoping poles used for the driven element.
The fit of the plastic housing on the pole tip is purposely very tight, so that the foam plug assembly will
stay in place. Before attaching the plastic housing, spread a small amount of dish soap around the in-
side edge of the plastic housing as shown in
figure 12.31
. This helps the housing slide on easily, and
the soap will eventually evaporate, leaving you with a firm interference fit.
Insert the plastic housing onto the telescoping pole tip as shown in
figure 12.32
. Be sure that the plas-
tic housing bottoms out on the pole tip, as shown in
figure 12.33
.
Repeat for the other non-loop telescoping pole tips.
FIG. 12.30
FIG. 12.31
FIG. 12.32
FIG. 12.33