Assembly Instructions- MA8040V
Step
1: Using the following items, install aluminum tubes on base insulator.
1
MA8040VBAB
12” x 1-3/8” OD aluminum base section
1
MA8040VBAT
36” x 1-3/8” OD aluminum antenna section #1
1
126241
16” x 1-1/4” OD fiberglass base insulator
2
010231
1-3/4” x 8-32 screw
2
010011
#8 nut
2
011941
#8 lock
washer
[ ] Identify lower end of base insulator (two
through-holes, 90-degrees offset).
[ ] Install slotted end of 12” base tube on insulator and align screw holes.
[ ] Insert 1-3/4” screw at
A
. Secure with lock washer and nut.
[ ] Install 36” antenna section #1 over other end of insulator and align screw hole.
[ ] Insert a 1-3/4” screw at
B
. Secure with a lock washer and nut.
1-3/4" x 8-32
1-3/4" x 8-32
Split LW
Nut
1" Gap
A
B
Align
Holes
Insulator
Antenna
Tube
Base
Tube
Align
Holes
Middle
Bottom
Top
BAB
BAT
Figure-1:
Base Insulator Assembly
Step-2:
Using the following items, assemble and install ground-radial attachment ring.
1
014764
2-1/4” x 8-32 SS screw
8
010009
5/8” x 8-32 SS screw
9
011941
#8 lock washer
9
010011
#8 nut
2
320056
1/4” spacer
1
194174
8-hole radial ring
2
194173
Small 90-degree aluminum bracket
[ ] Find the 2-1/4” screw, two small 90° angle brackets, and two 1/4” spacers.
[ ] Note that 90° angle brackets have
unequal sides
. Identify short side of each.
[ ] Install bracket (short side) and a 1/4” spacer on the 2-1/4” screw.
[ ] Insert screw through base tube as shown at
A
.
[ ] Install other 1/4” spacer and bracket (short side) on protruding end of screw.
[ ] Position brackets as shown and secure in place firmly using lock washer and nut.
[ ] Insert 5/8”
screws through angle brackets and place radial ring on top (
B
).
[ ] Secure
radial ring in place with lock washers and nuts (2 places)
[ ] Install six 5/8” screws in open holes, secure with lock washers and nuts (
C
).
2-1/4" x 8-32
Small 90-deree Bracket
1/4" spacer
#8 split lockwasher
#8 nut
Base Tube
5/8" x 8-32 (x2)
#8 nut
#8 lockwasher
Radial Ring
5/8" x 8-32 (x6)
#8 nut
#8 lockwasher
A
B
C
(x2)
Figure-2:
Ground Radial Ring Assembly
Step 14: Install Antenna on Base Section
1
030412
Large Worm clamp
[ ] Slip a large worm clamp on top of base section, positioning below split in tube (see
Figure-14
).
[ ] Carefully raise vertical radiator and insert splice tube into the base section.
[ ] Slide worm clamp into position over split in tube and tighten in place.
Handling Precautions:
During installation,
always use the buddy system to avoid injury and prevent antenna damage. Also,
never
attempt to raise an antenna near a power line or in high winds.
Slide large worm
clamp on tube
insert top section
into base section.
Secure with
worm clamp.
Raise antenna and
Figure-14:
Raising Antenna
Step-15: Connect feedline to antenna base.
2
100449
Solder lug
Prepare coax, as shown in
Figure-15.
Attach center conductor to main radiator and shield to ground radial
ring using solder lugs. For best weather protection, flood braid with a weather-resistant liquid sealant such
as Liquid Tape™. This will prevent water from entering the coax and wicking along the shield. Coil several
turns of coax next to the antenna base
or install a choke balun
at the feed
point (see
Appendix-1
for choke-
balun fabrication instructions). Feedline leading to station may be buried between radials.
Center Conductor
Shield
Coax Connection
1-3/4"
Cable Pigtail
Figure-15:
Feedline Connection
