Figure 5 Phase Line Cutting
Dimensions
Installation
Step-by-Step Assembly
This antenna fits a 1 5/8" to 2 1/16" outside
diameter mast.
Remove the parts from the carton and check
them against the Parts List and the illustrations.
Mount the antenna in the clear. Surrounding ob-
jects-particularly power lines and other objects
of considerable mass or length -are detrimental
to the performance of the antenna.
WARNING
Do not allow any part of the antenna to
touch power lines. This could cause
severe burns or fatal injuries.
When mounting the 208S-1 with an HF beam
antenna on the same mast, the 208S-1 should be
on top. If the 208S-1 is to be vertically
polarized, separation of the two antennas should
be at least 2 feet. If the 208S-1 is to be
horizontally polarized, separation should be at
least 6 feet.
The mast, if metallic, should never be run com-
pletely through the plane of the elements.
Slightly reduced performance will be noticed if
a vertically polarized 2085-1 is mounted at the
top of a metallic mast as shown in Figure l.
Horizontally polarized mounting will not be
affected. For optimum performance with a
vertically polarized 208S-1, a wooden mast
should be used and the coax routed past the
reflector then dropped to the mast.
Select the boom back-up plate, the boom-tomast
bracket and the four (4) 1/4"-20 x 3/4" bolts,
1/4" lockwashers and nuts.
Place the boom-to-mast bracket on the boom as
shown in Figure 6. The front and rear boom sec-
tions should meet in the middle of the boom-to-
mast bracket. Use the 1/4"-20 x 3/4" bolts in the
outside holes. Leave the inside holes for the two
(2) U-bolts, which will be used later for
mounting the mast. Select either the vertical or
horizontal mounting position. Adjust the boom
accordingly before tightening the bolts securely.
Select the R1 (40 1/4" rod). Use a pencil to
place a mark at the center of the rod (20 1/8"
from either end). Place two more marks 5/8"
from each side of the center mark.
Place a #10-24 x 1 1/2" eyebolt into the R1 slot
as shown in Figure 6, Detail A. Slide the R1
through the holes and the eyebolt until the outer
two marks on the R1 are visible on each side of
the boom. Slip on an aluminum half-washer, a
lockwasher and a # 10 nut. Tighten it just
enough to hold the rod securely. DO NOT
OVER TIGHTEN.
The antenna can be mounted either vertically or
horizontally for FM or SSB/CW operation
respectively. Circular polarization can be ob-
tained by using two yagis. For information
about which polarization to use consult local
Amateurs who use the frequencies you desire.
Select the element-to-boom insulator, two sec-
tions of the Driven Element (DE) 7/16" x 17
1/4" tubing) and a beta rod. See Figure 6, Detail
B.
