Lightning
For proper lightning protection, you must ground your antenna supporting
Protection
structure. Grounding will ensure noise free operation and low SWR. A proper ground consists of
a
1
12"
x 8' copper clad steel ground rod driven into the ground approximately 12 inches away from the
concrete tower base. Connect the tower to the ground rod using #8 copper wire and commercial non-
corrosive ground clamps.
Attachment
Use a good quality 50 ohm coaxial transmission line such as Belden 8214 (foam) of
Feediine or Belden 8237, 8267 or 9251 (solid). Take extra care when soldering connectors to foam
dielectric coaxial cable. Weatherproof all connectors which will be exposed to rain or ice with Coax-Seal°
or another similar substance.
Attach the transmission line to the BN-86 balun and tighten the connector
securel
. Ta
e the coax to the boom and mast to ensure
ood strain relief.
For protection against lightning, it is highly recommended that you use a Hy-
Gain Model LA-1 Lightning Arrestor. The Model LA-1 is available at your Hy-
Gain dealer. The LA-1 should be installed near your ground rod and
connected to the ground rod with #6 or #8 copper wire. Remember that
li
htnin
will take the most direct
ath to
round.
VSWR Curves These VSWR Curves are typical for this antenna mounted 70 feet above the
ground, horizontally polarized. Similar curves can be expected for this
antenna mounted between 30 and 100 feet above the ground.
DO NOT TRY
TO TUNE THIS ANTENNA FOR LOW VSWR AT GROUND LEVEL.
Higher
VSWR can be expected if mounted at less than 30 feet or above a roof or
large metallic structure. Forty (40) and eighty (80) meter wire dipoles should
be ke
t at least 6 feet below this antenna.
Guy wires should be broken up into non-resonant lengths and insulated from
the tower if mounted within 10 feet of the to
of the tower.
Coax-Seal' is a re
istered trademark of Universal Electronics
Inc.
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