12
Installing the Coaxial Feed System
Figure 6. Flange Bolt Tightening Sequences
d. After all RF components (ie: power dividers, radiators, rigid coax)
have been connected to each other, tighten the mounting bolts
securing the RF feed system to the pole.
Installing the Main
Power Divider (if
applicable)
If your antenna has more than one level, a main power divider will
feed it, with a cable to the four-way power divider at each level. Install
the power divider in accordance with
Figure 3
on page 6 and your
installation drawing.
a. Secure the power divider to the mount saddles using the band
clamps provided (generally, two clamps on a 6"-long saddle and four
clamps on a 12"-long saddle).
b. Connect the flex coax from the main power divider to the four-way
power dividers at the antenna levels.
CAUTION
To prevent damage to power dividers, position the hose clamp
screw housings over the saddles, not against the power dividers.
c. As each feedline section is lifted into place, remove the plastic bags
and protective covers from the flanges and install an O-ring, lubricat-
ing it with a light coat of petroleum jelly (provided with the antenna).
d. Secure each feedline section to its mount before installing the next
section.
Installing the Main
Feed Cables
A main feed cable brings power from the main power divider to the
four-way power divider at each level of the antenna.
CAUTION
Components are usually interchangeable and are therefore not
normally match-marked in any way. Assemble any bay to any feed
cable, with any mount, etc. If any matching is necessary with your
system, it will be indicated on the installation drawing.
CAUTION
Be very careful to connect each power divider port to the correct
radiator.
Install these cables in the same manner as the power-divider-to-radia-
tor cables. Their mounts are similar to the four-way power divider
mounts, but slightly larger to accommodate the corrugated cable outer
conductor.
