5
ASL670
4.
Installing 1/4” Threaded-Rod Element Sections:
The remaining 24 half-element sections are made from 1/4" solid aluminum rod with one end back-threaded
approximately 1". Before beginning installation, pair these rods according to length. ASL670EL12 will be the longest
pair, and ASL670EL1 will be the shortest. While not adjustable over a wide range, the 1" thread on each allows
minor length correction--as needed--to match the tip-to-rail lengths listed on element chart
Figure-E
. Begin installation
with the longest pair (ASL670EL12), and work from the back of the antenna toward the front--continuing the same
staggered mounting pattern. Refer to
Figure-D
for mounting details and
Figure-E
for element length.
Install a 1/4-20 nut on the first rod (ASL670EL12), and spin about 3/4 of the way down the thread. Insert this rod
into the correct mounting hole and secure finger-tight with a 1/4" lock washer and a second 1/4-20 nut.
Qty Part #
El # Tip-to-Rail
Tip-to-Tip
2
ASL670EL12 EL12 43-3/16" (109.7cm) 87-3/8" (221.9 cm)
2
ASL670EL11 EL11 35-3/8" (89.9 cm)
71-3/4" (182.2 cm)
2
ASL670EL10 EL10 28-7/8" (73.3 cm)
58-3/4" (149.2 cm)
2
ASL670EL9
EL9
23-1/2" (59.7 cm)
48" (121.9 cm)
2
ASL670EL8
EL8
19-1/8" (48.6 cm)
39-1/4" (99.7 cm)
2
ASL670EL7
EL7
15-1/2" (39.4 cm)
32" (81.3 cm)
2
ASL670EL6
EL6
12-5/8" (32.1 cm)
26-1/4" (66.7 cm)
2
ASL670EL5
EL5
10-1/4" (26.0 cm)
21-1/2" (54.6 cm)
2
ASL670EL4
EL4 8-1/4" (21.0 cm)
17-1/2" (44.5 cm)
2
ASL670EL3
EL3 6-3/8" (16.2 cm)
13-3/4" (34.9 cm)
2
ASL670EL2
EL2 5-1/16" (12.9 cm)
11-1/8" (28.3 cm)
2
ASL670EL1
EL1 4-3/16" (10.6 cm)
9-3/8" (23.8 cm)
Figure-E Rod-Element Length Chart:
FIGURE D
Be sure to continue the staggered mounting pattern
throughout.
Length Tip-to-Rail
Length Tip-to-Rail
Length Tip-to-Tip
Bottom Rail
Top Rail
77
7
77
7
EL
13
7
EL
14
77
EL
12
EL
11
EL
10
EL
6
EL
9
EL
8
EL
7
EL
5
EL
4
EL
3
EL
2
EL
1
77
EL
14
7
EL
13
EL
13
EL
13
EL
14
EL
14
EL
9
EL
10
EL
11
EL
12
EL
1
EL
2
EL
3
EL
4
EL
5
EL
8
EL
7
EL
6
20” (50.8 cm)
20” (50.8 cm)
8” (20.3 cm)
8” (20.3 cm)
43-3/16" (109.7 cm)
35-3/8" (89.9 cm)
28-7/8" (73.3 cm)
23-1/2" (59.7 cm)
19-1/8" (48.6 cm)
15-1/2" (39.4 cm)
12-5/8" (32.1 cm)
10-1/4" (26.0 cm)
8-1/4" (21.0 cm)
6-3/8" (16.2 cm)
5-1/16" (12.9 cm)
4-3/16" (10.6 cm)
Dimensions shown
are Tip-to-Rail
Adjust to the tip-to-rail length specified in
Figure E
and secure
hardware. Insert the opposing half-element in the bottom rail,
adjust for length, and secure. Tip-to-tip length for EL12 should
be 87-3/8".
Install the remaining elements, referring to
Figure-E
.
