9
THE ELEMENTS:
Start with the smallest element, #10, at the front of the antenna. These are double steps, do one step
for each side of the antenna. See
FIG. 1.
STEP WHAT GOES
INTO WHAT
FASTEN WITH
On BS 4
22
.375” x 72” tube
.500” x 17.1” tube: Element #10
6-32 x 3/4” machine screw & nut
23
.375” x 72” tube
.500” x 27.0” tube: Element #9
6-32 x 3/4” machine screw & nut
24
.375” x 72” tube
.500” x 38.0” tube: Element #8
6-32 x 3/4” machine screw & nut
25
.375” x 72” tube
.500” x 48” tube
6-32 x 3/4” machine screw & nut
26
Results of Step 25
.625” x 4.2” tube: Element #7
10-24 x 1.0” machine screw & nut
On BS 3
27
.375” x 72” tube
.500” x 48” tube
6-32 x 3/4” machine screw & nut
28
Results of Step 27
.625” x 17.9” tube: Element #6
10-24 x 1.0” machine screw & nut
29
.375” x 72” tube
.500” x 48” tube
6-32 x 3/4” machine screw & nut
30
Results of Step 29
.625” x 33.0” tube: Element #5
10-24 x 1.0” machine screw & nut
On BS 2
31
.375” x 72” tube
.500” x 48” tube
6-32 x 3/4” machine screw & nut
32
Results of Step 31
.625” x 36” tube
10-24 x 1.0” machine screw & nut
33
Results of Step 32
.750” x 16.0” tube: Element #4
10-24 x 1-1/4” machine screw & nut
34
.375” x 72” tube
.500 x 48” tube
6-32 x 3/4” machine screw & nut
35
Results of Step 34
.625” x 36” tube
10-24 x 1.0” machine screw & nut
36
Results of Step 35
.750” x 24” tube
10-24 x 1-1/4” machine screw & nut
37
Results of Step 36
.875” x 12.8” tube: Element #3
10-24 x 1-1/4” machine screw & nut
On BS 1
38
.375” x 72” tube
.500” x 48” tube
6-32 x 3/4” machine screw & nut
39
Results of Step 38
.625” x 36” tube
10-24 x 1.0” machine screw & nut
40
Results of Step 39
.750” x 24” tube
10-24 x 1-1/4” machine screw & nut
41
Results of Step 40
.875” x 33.8” tube: Element #2 i
10-24 x 1-1/4” machine screw & nut
42
.375” x 72” tube
.500” x 48” tube
6-32 x 3/4” machine screw & nut
43
Results of Step 42
.625” x 36” tube
10-24 x 1.0” machine screw & nut
44
Results of Step 43
.750” x 24” tube
10-24 x 1-1/4” machine screw & nut
45
Results of Step 44
.875” x 36” tube
10-24 x 1-1/4” machine screw & nut
46
Results of Step
45
1.000” x 23.1” tube: Element #1
10-24 x 1-1/4” machine screw & nut
ASSEMBLY PHASE 4
—Element Build out (Steps 22– 33)
ASSEMBLY PHASE 5
—Install shorting stub, BMI, & balun (Steps 47—49)
Before Proceeding - STOP AND COMPARE. DOES IT LOOK LIKE THE PHOTOS AND DRAWINGS ?
Step 47 - SHORTING STUB
Remove the nuts from the ¼-20 machine screws holding Element #1 in place, slip the shorting stub onto these and re-
place the nuts while positioning the stub per the photos. Reach into the element tube with long-nosed
pliers to hold the machine screws in place for tightening during this step.
The Collins Balun.
This uses approximately 12 ft of
ONLY
RG-8 or RG-213 coaxial cable. For best results, the turns
are side-by-side, not bunched (See photo). Form a coil of 4 side-by-side turns of coax say, going from left to right. We
use a 3” light wall PVC pipe for a coil form. Secure (tape/tie-wrap) these first 4 turns in place and once you’ve done this,
go on top of the first 4 turns with another 4 turns, these will go from right to left. This causes both ends of the coil to be
on the same side. Allow only 2-5” of cable from the coil to the antenna feed point. If you construct your own, don’t use
so much tape that water cannot drain from the coil.
Step 48 -
Install the
Collins Balun
(
CHOKE
) at the front of the Antenna, by the smallest element, in front of the antenna
and on the already installed Choke Plate using the supplied Hose Clamp. Wrap the Hose Clamp over and through the
inside of the CHOKE and then down and around the Choke Plate. Tighten the Hose Clamp firmly. Now electrically con-
nect the Choke to the Boom Sections (feed points). Take the Center Conductor and install it on the top boom. Take the
Braid and install it on the bottom boom. Secure both the Center Conductor and Braid to the Boom Sections using the
supplied 10-24 x ½” machine screws & nuts. See
Figure 7
.
CAUTION
–
In the following steps, make sure that the threads are clean and well lubricated.
Step 49 -
Mount the
Boom-Mast Insulator
on the booms, at the point labeled
C,
using 3/8” bolts, washers and nuts and
reinforcement Washers (thick washers). See
FIG. 5 & 6
.
The parts sequence is: Head of bolt - washer – Boom-Mast-
Insulator – Booms – Reinforcement Washers (thick washers) – Nuts 3/8-16 x 3.5” Bolts, Etc.
Step 50 -
Mount the antenna to your mast. See
FIG. 8.
See
CAUTION
above.
SLIPP-NOTT Clamps (two half shells), 3/8-16 bolts, nuts & washers. Note: If your mast is of such a size that you need a
longer bolt for your SLIPP-NOTT Clamps, please give us a call and we will send them to you. The parts sequence is:
Head of bolt – Washer- Slipp-Nott Clamp (half shell) – Mast- BMI – Washer – Nuts (review picture).
