FIGURE C
29
41
407
41
14
13
Top
Top
Top
Bottom
Bottom
Bottom
Bottom
Top
Channel
Shown
Full
Element
Length
Half
Element
Length
4
ASL670
KEY
P/N DISPLAY
DESC
SIZE
QTY
11
010011
SS
8-32
4
HEX NUT
13
ASL670
ALUMINUM
1/2" OD x 46”
4
EL13
TUBE
(1.27 x 116.84 cm)
14
ASL670
ALUMINUM
3/8" OD x 22”
4
EL14
TUBE
(.95 x 55.8 cm)
29
010229
SS MACHINE
8-32 x 1”
4
SCREW
(2.54 cm)
41
011941
SS SPLIT LOCK
#8
4
WASHER
77
050077
PLASTIC
3/8” OD x 7/8"
4
END CAP
(.95 x 2.2 cm)
407
030407
SS WORM
7/32”
4
CLAMP
(.56 cm)
2. Log Periodic Element Mounting Pattern:
FIGURE B: Staggered Mounting Pattern
Each full element on the ASL670 consists
of two half-sections. Each half-section is
stagger-mounted.
This means, if a half-
element mounts in the top boom channel,
its companion half-element must mount in
the bottom boom channel on the opposite
side. Also, if a full element occupies one
pair of holes, the
next
element must occupy
the opposite pair (refer to
Figure-B
). This
staggered (or alternating) mounting pattern
is needed to reverse the phase of each
element by 180-degrees. Holes are drilled
in both sides of the boom, so you must use
caution and select the correct pair when
mounting each element.
Important Note: You must adhere to this
alternating mounting pattern when
installing element sections for the
antenna to work properly!
77
11
77
14
13
3. Mounting Rear Telescoping Elements EL14, EL13:
The two longest elements are mounted toward the rear of the
boom. Find four (4) 1/2" x 46" element sections (13), and four
(4) 3/8" x 22" extension tubes (14).
Locate the rear-most 1/2" dia. hole of the top rail and install
a 1/2" x 46" element tube (13) as shown in
Figure-C
. Secure
in place with a 8-32 x 1" screw.
Using the companion set of
holes in the bottom rail, install a 1/2" x 46" tube from the
opposite side. Secure as above.
Slip a worm clamp (7) over the slotted end of both 1/2" tubes
and insert a 22" x 3/8" telescoping element section in each (13).
Adjust each half-element for 65"--as measured from its tip to
side of the boom--and secure the worm clamps. Tip-to-tip
span for EL 14 should measure 131".
Move forward to the next pair of 1/2" mounting holes and
install the remaining 1/2" x 46" tubes,
stagger mounting them
from the first pair
. Secure in place as above.
Install the remaining worm clamps and 22" x 3/8" telescoping
extensions, and adjust each half-element for 53" tip-to-boom.
Secure the worm clamps. Tip-to-tip span for EL13 should
measure 107". Install black plastic end caps on each tip (77).
Qty Part #
El # Tip-to-Rail
Tip-to-Tip
4
ASL670EL13 EL13
53" (134.6 cm)
107" (271.8 cm)
4
ASL670EL14
EL14
65" (165.1 cm)
131" (332.7 cm)
