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A449-6S

WARNING

THIS ANTENNA IS AN ELECTRICAL CONDUCTOR.  CONTACT WITH POWER LINES CAN RESULT IN DEATH OR SERIOUS INJURY.
DO NOT INSTALL THIS ANTENNA WHERE THERE IS ANY POSSIBILITY OF CONTACT WITH OR HIGH VOLTAGE ARC-OVER FROM
POWER CABLES OR SERVICE DROPS TO BUILDINGS.  THE ANTENNA, SUPPORTING MAST AND/OR TOWER MUST NOT BE CLOSE
TO ANY POWER LINES DURING INSTALLATION, REMOVAL OR IN THE EVENT PART OF THE SYSTEM SHOULD ACCIDENTALLY
FALL.  FOLLOW THE GUIDELINES FOR ANTENNA INSTALLATIONS RECOMMENDED BY THE U.S. CONSUMER PRODUCT SAFETY
COMMISSION AND LISTED IN THE ENCLOSED PAMPHLET.

1

Your Cushcraft A449-6S antenna is designed and manufactured to give top performance and trouble free service.  The antenna will perform as
specified if the instructions and suggestions are followed and care is used in assembly and installation.  When checking the components received
in your antenna  package use the parts lists in each section.  It is easiest to identify the various dimensions of tubing by separating them into groups
of the same diameter and length.  If you are unable to locate any  tube or component, check the inside of all tubing.  

IMPORTANT: save the weight

label from the outside of the carton.  Each antenna is weighed at the factory to verify the parts count.  If you claim a missing part, you will be asked
for the weight verification label.  There is a master parts list on page 2.

LOCATION

Location of the antenna is very important.  Surrounding objects such as trees, power lines, other antennas, etc. will seriously reduce efficiency.  To
minimize the effects of surrounding objects, mount the antenna as high and in the clear as possible.  If metal guy wires are used, they should be
broken with strain insulators.  YOU MUST INSURE THAT NEITHER PEOPLE NOR PETS CAN COME IN CONTACT WITH YOUR ANTENNA
WHILE IT IS IN OPERATION.  DEADLY VOLTAGES AND CURRENTS MAY EXIST.  ALSO, SINCE THE EFFECTS OF EXPOSURE TO RF ARE
NOT FULLY UNDERSTOOD, LONG TERM EXPOSURE TO INTENSE RF FIELDS IS NOT RECOMMENDED.  THERE IS A WARNING STICKER
WHICH MUST BE ATTACHED TO THE BOOM AS SHOWN IN FIGURE D.

Plan your installation carefully.  If you use volunteer helpers be sure that they are qualified to assist you.  Make certain that everyone involved
understands that you are in charge and that they must follow your instructions.  If you have any doubts at all employ a professional antenna
installation company to install your antenna.

MOUNTING

The A449-6S mast mount bracket will take up to a 2" (5.1 cm) O.D. mast.  A 1-1/4" (3.17 cm) television type tubing is satisfactory for any of the
single beams.  A good heavy-duty antenna rotator will provide the best service and longest life.  Often it is desirable to mount several antennas
on one mast.  To keep possible interaction to minimum, place your antennas as far apart as you can.  Mount the A449-6S with the

 Reddi-Match

rod pointing up.  Keep the mast mount bracket on the opposite side of the boom from the elements.  This will help to minimize pattern distortion
from the mast.  See page 5 for dual array configuration.

SYSTEM GROUNDING

Direct grounding of the antenna, mast, and tower is very important.  This serves as protection from lightning strikes, static buildup, and high voltage
which is present in the radio equipment connected to the antenna.  A good electrical connection should be made to one or more ground rods (or
other extensive ground system) directly at the base of the tower or mast, using at least  #10 AWG ground wire and non-corrosive hardware.  For
details and safety standards, consult the National Electrical Code.  You should also use a coaxial lightning arrester.  Cushcraft offers several different
models, such as LAC-1, LAC-2, and the LAC-4 series.

ASSEMBLY

Assemble your antenna by following the directions and illustrations in steps 1 through 5.  After the antenna is completely assembled, verify
dimensions and element spacings for accuracy.  Then, return to the section below for final tuning.

TUNING PROCEDURE

The A449-6S does not normally  require tuning after assembly.  However, if you wish to check the VSWR before installation, please observe the
following procedures.  To prevent detuning the antenna, it should be tuned in place or at least 7 feet (2.1 m) above ground and clear of surrounding
objects.  Keep all metal obstructions such as guy wires and other antennas at least 7 feet (2.1 m) away since they will nullify any adjustment and
degraded performance will result.

Run the coax cable from your transmitter to the area in which the antenna is going to be tested.  The length of this cable or your feedline is not critical.
Connect a good quality  VSWR bridge to the end of this cable.  Connect a short length of cable [10 ft (3 m) or less] from the VSWR bridge to the
antenna.  Set the transmitter to your center operating frequency.  When you read VSWR, be sure you move far enough away from the antenna
so that your body does not effect the reading.

Measure the VSWR.  If it is high, move the Reddi-Match clamp by 1/4" (.6 cm) in one direction and check the VSWR.   If the VSWR improves, then
continue moving the Reddi-Match clamp in the same direction.  If the  VSWR deteriorates then move the Reddi-Match clamp in the opposite direction.
Repeat this procedure until no further improvement can be made.  You have matched your antenna to 50 Ohms.  Tighten all connections making
sure to keep the Reddi-Match assembly parallel to the element (EB) above.  Tape the feedline to the boom and mast (figure G).

Содержание A449-6S

Страница 1: ...951425 7 93 ASSEMBLY AND INSTALLATION A449 6S 70 CENTIMETER FM YAGI ANTENNA 440 450 MHz COMMUNICATIONS ANTENNAS ...

Страница 2: ...tenna rotator will provide the best service and longest life Often it is desirable to mount several antennas on one mast To keep possible interaction to minimum place your antennas as far apart as you can Mount the A449 6S with the Reddi Match rod pointing up Keep the mast mount bracket on the opposite side of the boom from the elements This will help to minimize pattern distortion from the mast S...

Страница 3: ...32 8 32 x 2 1 2 6 4 cm stainless steel machine screw 1 251 050251 3 8 9 cm white plastic cap 1 326 290326 Danger label 1 FIGURE A 402 013402 5 16 8 cm stainless steel flat washer 2 405 010405 4 1 2 x 2 7 16 11 4 x 6 2 cm stainless steel U bolt 1 921 200921 Reddi Match clamp 2 941 360941 8 aluminum flat washer 2 BA 7 8 x 36 2 2 x 91 4 cm aluminum tubing drilled 10 places 1 CB Connector bracket 1 EA...

Страница 4: ... clamp assembly Connect the flattened rod end to the screw on the connector bracket CB with nut 11 and washer 41 Attach the entire driven element assembly shown below to the boom with hardware provided referring to figure F for the proper location Slide the poly tube PT in the Reddi Match assembly over the rod RR up to the flattened end of that rod figure B 2 Adjust to the dimensions indicated and...

Страница 5: ... CONNECTOR ASSEMBLY This antenna is designed for use with 50 Ohm coaxial cable terminated with a PL 259 connector Any length of feedline can be used with your A449 6S The shortest length of cable will have the least loss A connector boot is included for use with your new antenna Slide the boot over the cable before attaching your PL 259 figure E Spread silicone on the outer threads of the Reddi Ma...

Страница 6: ...ve the least loss 6 STACKING 25 63 5 cm FIGURE H FIGURE G The A449 6S may be stacked in arrays for improved radiation patterns and increased gain When stacking 2 antennas use the Cushcraft A449 VPKS stacking kit The kit consists of a phasing harness aluminium stacking boom and the associated hardware to mount the two A449 6S s The harness by itself is called the A449 SK ...

Страница 7: ......

Страница 8: ...l at its option repair or replace the antenna at its expense within thirty days of the date the antenna is returned at purchasers expense to Cushcraft or one of its authorized representatives This warranty is in lieu of all other expressed warranties any implied warranty is limited in duration to one year Cushcraft Corporation shall not be liable for any incidental or consequential damages which m...

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