Assembly Of Vertical Radiator; Top Element Installation - Hy-Gain AV-18HT Instruction Manual

“hy-tower” vertical antenna 10,15,20,40, and 80 meters
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Assembly of Vertical Radiator

Attach one 4" metal angle to the lower -tower
plate and one to the upper tower plate using two
(2) 1/4"-20 x 3/4" screws for each angle. Do not
tighten the screws at this time.
Select
the
two
insulators and place them in the holes provided
on the 4" metal angles attached to the top
tower section. See Figure 6.
Item
No.
7
Angle, vertical element, 1" x 1" x 4"
17
Insulator, 2" I.D. x 3 7/8"
26
Bolt, 1/4"-20 x 3/4", hex head, stainless steel
33
Lockwasher, 1/4", internal, stainless steel
35
Nut, 1/4"-20, hex, stainless steel
(2)
U-bolts
and
Description

Top Element Installation

Select the 2" x 75" length of aluminum tubing
and place the two (2) 2" ID x 3 7/8" insulators
over the end of the tubing which has the metal
sleeves inserted in it.
Adjust the insulators so that they are ap-
spacer
proximately 28 3/8" apart, with the bottom one
approximately 1 1/2" from the end of the
tubing (the end with the metal sleeve).
Item
No.
38
39
Lockwasher, split, 5/16", stainless steel
40
Nut, 5/16"-18, hex
58
Insulator, vertical element spacer, 1" x 4"
61
Assembly, tube with dowel, 2" x 75"
Figure 6
Description
U-Bolt, 5/16" x 3" x 3 11/16"

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