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Page 62
Preparing the telescoping pole tips for the 40/30 loop elements
Extend the telescoping poles to full length by firmly “locking” each section of the pole in place. A good meth-
odology is to position each half of the joint so that they are several inches apart (while still within each other),
and then pull quickly and firmly. Do this for each pole. There are rubber plugs inside the base section of each
telescoping pole. These make it easier for handling, but they
MUST
be removed before measuring the pole
lengths. They also need to be removed permanently when attaching the poles to the EHU’s.
With poles fully extended, trim the end of the tip element of each pole so that the pole is 212.75 inches (540.4
cm) from the tip of the pole to the butt end, as shown in
figure 10.01
. Use a hack saw or similar cutting blade
that is suitable for fiberglass. Circular pipe cutters used by plumbers work well too.
Using the included conical drill bit, chamfer the ends of the 40/30 poles as shown in
figure 10.02
. The drawing
in
figurer 10.03
shows the proper angle to chamfer to. Be sure to clean out the interior of the fiberglass poles
before continuing. Debris inside the telescoping poles can lead to failure of the EHU.
Secure polyolefin heat shrink to the telescoping pole joints
On all the telescoping fiberglass elements we now include double wall polyolefin heat shrink (PN 03630). Each
telescoping pole uses 3 of the polyolefin heat shrink pieces,. Once finished, the seal is secure and waterproof.
This product requires a heat gun for activation of the adhesive. Do not attempt to use a hair dryer for this
task.
Note that on the non-loop telescoping poles ONLY, the minimum length when extended
must not be less than 213 inches. It is OK if they are longer.
When positioning the heat shrink, place it
so that the joint of the telescoping pole is centered in the middle of the heat shrink.
Figures 10.04, 10.05,
10.06 and 10.07
below show how this is done.
Using a heat gun (hair dryers will NOT work), apply heat evenly around the entire area of heat shrink. Note:
There are 4 blue colored lines imprinted on the tubing. The joint is considered done being heated and water-
proof when the lines change color. Each line needs to change in color to ensure even adhesion temperatures
.
TRIM THE TIP OF EACH POLE FOR AN OVERALL LENGTH OF 212.75 INCHES
FIG. 10.01
FIG. 10.02
FIG. 10.03
FIG. 10.04
FIG. 10.05
FIG. 10.06
FIG. 10.07
CHAPTER TEN
SECTION 10.0
ELEMENT SUPPORT TUBE (EST) PREPARATION
PREPARE THE TELESCOPING POLES FOR LOOP & NON-LOOP ELEMENTS
