40 METER SHORTY INSTALLATION
INTERNATIONAL ANTENNA COMPANY
888-268-4214 CLICK HERE FOR PRINTABLE PDF
are the proud owner of the new DOUBLE BAZOOKA SHORTY ANTENNA. The first
thing to do is to consider which direction you want your maximum signal
to radiate. The Antenna tends to be omni-directional, however, the
largest lobes radiate from the sides. If you want your maximum signal to
radiate North and South,extend the ends East and West. The antenna
should be mounted in an inverted "V" configuration for the best results.
The apex should be 20 to 35 feet above around.
Mounting on a
push up pole or tower is easiest. Suspend the apex of the antenna from
the eyehook provided at the center of the "T" mold. Next, extend the
ends of the antenna outward and downward so the antenna forms an upside
down "V". Mount the ends at least 10 to 20 feet above the ground forming
an angle of no less 120
degrees from horizontal. Were horizontal
would be 180 degrees. The ends may be fastened with cord to poles or
whatever, using proper safety rules in safeguarding that persons, pets,
and other objects cannot come in contact with any of the elements as
shock hazards or RF burns could result.
• Whenever connecting
the ends of the antenna to an object it is recommended that a light or
medium relief “springs” with a safe working load limit of 5 lbs be
installed to compensate for any movement of the antenna or connecting
object. “DO NOT USE A TENSIONER DEVICE”.
After mounting, the
antenna connect a 50 ohm feed line such as RG-58, RG-8 or RG-213 coax to
the antenna and yourtransmitter. With a very low amount of output power
applied to the antenna at your desired frequency, measure the SWR. An
antenna analyzer may also be used to measure the SWR. The antenna should
exhibit an SWR of less than 2:1 across the entire 20 meter band. The
antenna is cut for the CW portion of each band from the factory so
further adjustment is optional. For more detail see tuning
instructions on the IAC website located in the information section.
lower the SWR, fold the 300-ohm twin lead back on itself ensuring it is
flat on itself with no gaps equally on each side. The fold of 12, 24,
36 or 48 inches must be done in a (single fold over not multiple fold
overs). This procedure will raise the operating frequency of the CW
portion of the band. Once the lowest SWR is
obtained tie wrap the folded end securely to retain its position. If you measure a higher SWR, make sure that the
antenna is not near or touching any metal objects such as rain gutters, aluminum siding, metal roofs, etc.
making sure the SWR is within spec and everything is clear of the
antenna. You are ready to operate and enjoy all of the great signals
and DX contacts that this antenna offers.
We at IAC wish you the greatest DX' ing and are sure you will be pleased with your purchase.
IAC ACCEPTS NO LIABILITY FOR DAMAGE OR INJURY RESULTING FROM THE INSTALLATION AND USE OF THIS ANTENNA.