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11. Locate the 4" OD x 72", 0.120" wall thickness antenna bottom element section. There are 5
holes drilled in this element section. Four drilled holes at the top are used for mating to the next
antenna element section. One hole is drilled near the bottom for the feed point connection.
Loosen the previously installed U-Bolts (Step 9). Insert the 4" OD x 72" bottom element section
into the antenna base section through the three U-Bolts with the feed point at the bottom facing
front as shown below.
The bottom of the 4" OD element tube should be even with the bottom of the insulated channel
as shown below.
Tighten the U-Bolt hardware evenly so the length of the exposed threads is approximately equal.
Any clamp should be tightened evenly from side-to-side with an equal amount of thread above
each nut.
