TYPICAL TOOLS REQUIRED: measuring tape, phillips screwdriver, 5/16”, 11/32”, 7/16”, and 1/2
spin
-
tite, end wrenches and / or sockets. Heavy duty models may require larger sizes.
1.
Lay out the boom sections and assemble using the
DIMENSION sheet as a guide for position and hardware.
2.
Cut a strip of masking tape about 6” long. Fold the
ends under and stick the tape to a flat surface, sticky
side up.
Lay out the elements by length and position as
shown the DIMENSION sheet. NOTE: THE ELEMENTS
IN THIS ANTENNA DO NOT ALL TAPER IN LENGTH.
Now lift off the REFLECTOR and find the rough center by
balancing it across finger. Push on a black button insulator
to about 1/2” from center. Insert the element through the
holes at the rear of the boom and install the second
button. IF THE ELEMENT IS LOOSE IN THE BUTTONS,
SQUEEZE THE SMALL END OF EACH BUTTON
SLIGHTLY WITH
PLIERS
UNTIL
IT
OFFERS
SIGNIFICANT RESISTANCE WHEN THE ELEMENT IS
INSERTED. THIS WILL HELP TO HOLD THE ELEMENT
IN POSITION DURING SUBSEQUENT OPERATIONS.
Install the 3/16” rod DRIVEN ELEMENT as you did the
reflector. Then continue with the installation of the
DIRECTORS.
Note that the Director Elements may not
consistently diminish in length from rear to front, so
pay close attention to length and position.
3.
Now begin centering the elements. Use a tape measure to EQUALIZE the amount the element
sticking out on each side of the boom. Once all are centered, sight down the antenna from the rear
and compare tip symmetry. Look for any
obvious discrepancies and correct if found.
4.
Stainless steel SHAFT RETAINERS are used
for securing the elements and insulators.
Always use retainers for permanent and long
term antenna installations. For most portable or
temporary use, the button insulators are
satisfactory and the retainers may be left off.
5.
Use thumb and index finger to hold a Shaft
Retainer over end of the 3/8” X 3” push tube
(internal fingers dished into tube). Hold the
element firmly and start the keeper onto the rod
by applying pressure with the push tube. Push
the Shaft Retainer down element until tight against the button insulator (Locking pliers,
lightly
clamped up against opposite button insulator will help maintain center reference and keep you from
pushing the first Shaft Retainer too far). Repeat for the opposite side. Continue installing Shaft
Retainers until all elements are locked in place.
6.
Mount the DRIVEN ELEMENT FEED BLOCKS to the boom using a single 8
-
32 screw 1
-
1/4" long.
Orient with feed and balun connectors as shown on the Dimension Sheet. The ‘T’ block mounts
behind the rear driven element.
M
A
S
K
I N
G
T
A
P
E
O
R
E
Q
U
I V
A
L E
N
T
F
A
C
E
U
P
E
L E
M
E
N
T
P
R
E
P
A
R
A
T
I O
N
R
E
F
L E
C
T
O
R
E
L E
P
R
E
P
M
. S
T
A
A
L
5 - 2 4 - 0 5
F
R
O
N
T
D
I R
E
C
T
O
R
418CP30 ASSEMBLY MANUAL
