MA5V
3
Important Note: Unless otherwise noted, all hardware used in assembly
will be #8-32 Stainless Steel.
Step #1 Wind and Mount Coaxial Choke:
Find the 54” fiberglass insulated tube (MA5BB). Also, find two 2” screws (20)
and two nuts (11). Locate choke mounting holes 9-1/2” apart on base end
(Photo-1)
. Install a 2” screw in each hole and secure with a nut as shown.
Find the 1-1/8” x 12” aluminum base tube (MA5BA). Also, find one 1-1/4”
screw (40) and one nut (11). Slide the slotted end of the aluminum base tube
over the fiberglass tube and align mounting holes. Install a screw and nut at
the top mounting hole and tighten so the slotted tube compresses onto the
insulated mast
(Photo-2)
. The second mounting screw will be installed later.
Find two 1/2” OD x 5/16” aluminum spacers (45). Install one over each
mounting screw so it clears the nut
(Photo-3)
.
Find the 2-3/8” OD x 10-1/4” PVC balunl form (01). Slide form over the end
of the mast and seat into position so it rests on the spacers
(Photo-4)
.
Find the 34’ roll of RG-58AU coaxial cable (MA5VFL). Also, find two 3/16”
nylon cable clamps (02), two flat washers (44), and two nuts(11). Locate the
pig-tail end of the coax cable and measure 38” down from the end. Install a
nylon cable clamp at this location. Install the cable and its clamp as shown
in
Photo-5
, securing in place with a flat washer and a nut.
Uncoil and lay out the opposite end of the feedline, removing any bends
or loops that could interfere with winding the balun. To wind, rotate the
coil form and mast with one hand, while guiding turns into place with the
other
(Photo-6)
.
Wind until the last turn falls 1/2” from the opposite mounting stud. Turns should
be tight with no open areas between windings. Install the remaining cable
clamp and secure in place with a flat washer and nut
(Photo-7).
Step- #2 Install Mounting Hardware:
Find two extruded aluminum “V” blocks and the mast-mount hardware kit
(GOMNIHK). Open the plastic bag and separate the smaller 1/4” hardware
from the larger 5/16” hardware.
Using 1/2” hardware, install the mast-mount blocks approximately 10” apart
on the support tube, as shown in
Photo-8
. Align the lower block with the upper
block by sighting down between the narrow splits in the mounting rings while
tightening hardware.
You may install the 5/16” U-bolt hardware temporarily at this time, or set it
aside until the antenna is ready to mount on a support.
Find a 1-1/4” screw (40) and nut (11). Install in the base tube’s remaining
mounting hole and tighten securely
(Photo-9)
.
Photo-1
14
010214
Hex screw
1/4”
2
84
010084
Lock washer
1/4”
2
85
010085
Nut
1/4”
2
18
323718
Aluminium V-block
2
04
010404
U-bolt
5/16”
2
118
010118
Nut
5/16”
2
19
010119
Lock washer
5/16”
2
KEY P/N DISPLAY
DESC
SIZE
QTY
Photo-2
Photo-3
Photo-4
Photo-6
Photo-7
Photo-8
Photo-9
BB MA5VBB
Insulated Base
1” x 54”
1
20
010120
RH Machine screw
8-32 x 2”
2
11 010011
Hex
nut
#8-32
18
BA MA5VBA
Base tube
1-1/8” x 12”
1
40
010040
RH Machine screw #8-32 x 1-1/4”
2
45
321045
Aluminium spacer 1/2” OD x 5/16”
2
01
125401
Balun form
-------
1
FL
MA5VFL
Feedline cable
34’
1
02
035402
Nylon cable clamp
3/16”
2
44
014544
Flat washer
1/4”
2
KEY P/N DISPLAY
DESC
SIZE
QTY
MA5BB
20
11
2 PLACES
2 PLACES
MA5BA
40
11
45
2 PLACES
01
02
RG-58AU
44
11
02
11
44
18
10”
40
11
Photo-5
14
85
84
04
118
19
GOMNIHK
KIT
(Omni mounting kit)
