LIMITED WARRANTY
CUSHCRAFT CORPORATION, P.O. BOX 4680, MANCHESTER, NEW HAMPSHIRE
03108, WARRANTS TO THE ORIGINAL CONSUMER PURCHASER FOR ONE YEAR
FROM DATE OF PURCHASE THAT EACH CUSHCRAFT ANTENNA IS FREE OF
DEFECTS IN MATERIAL OR WORKMANSHIP. IF, IN THE JUDGMENT OF CUSHCRAFT,
ANY SUCH ANTENNA IS DEFECTIVE, THEN CUSHCRAFT CORPORATION WILL, AT
ITS OPTION, REPAIR OR REPLACE THE ANTENNA AT ITS EXPENSE WITHIN THIRTY
DAYS OF THE DATE THE ANTENNA IS RETURNED (AT PURCHASER'S 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 MAY RESULT
FROM A DEFECT. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN
IMPLIED WARRANTY LASTS OR EXCLUSIONS OR LIMITATIONS OF INCIDENTAL OR
CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION AND EXCLUSION MAY NOT
APPLY TO YOU. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU
MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE. THIS
WARRANTY DOES NOT EXTEND TO ANY PRODUCTS WHICH HAVE BEEN SUBJECT
TO MISUSE, NEGLECT, ACCIDENT OR IMPROPER INSTALLATION, ANY REPAIRS OR
ALTERATIONS OUTSIDE OF THE CUSHCRAFT CORPORATION FACTORY WILL NULLIFY
THIS WARRANTY.
SPECIFIC
ATIONS SUBJECT
O CHANGE WITHOUT NOTICE
T
ASSEMBLY AND INSTALLATION
INSTRUCTIONS
A505S
5 ELEMENT
C u s h cr a ft C o r p o ra t io n s h a ll n o t b e li a b l e f o r a n y in c i d e n t a l o r
c o ns eq ue n tia l d am a ge s w hi c h m a y re su lt fr o m a d efe c t, o r u se , im p ro p er
o r o th e rw is e o r in st al la tio n , im p ro pe r o r o th e rw is e.
P le as e c on ta ct y ou r v en d o r fo r te c h ni c a l s up p o rt a nd w a rr an ty s er v ice .
W A R R A N T Y A N D L IA B I L IT Y
C O M M U N I C AT IO N S A N T E N N A S
48 Perimeter Road, Manchester NH 03103 USA
Telephone: 603-627-7877 • Fax: 603-627-1764
E-mail: sales@cushcraft.com
Web Site: http://www.cushcraft.com
International - Tel: +1-603-627-7877 • Fax:+1-603-627-1764
6 METER BEAM
951365_GF_AA
A50-5S
A50-5S
THIS ANTENNA IS AN ELECTRICAL CONDUCTOR. CONTACT WITH POWER LINES CAN RESULT IN DEATH, OR SERIOUS
WARNING
INJURY. DO NOT INSTALL THIS ANTENNA WHERE THERE IS ANY POSSIBILITY OF CONTACT WITH OR HIGH VOLTAGE ARCOVER 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.
Your Cushcraft 6 meter beam 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 OR 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 E.
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.
KEY P/N DISPLAY DESC SIZE QTY
115 050115 CONNECTOR 1
116 240116 SILICONE 1
cushcraft
SILICONE GREASE
BOOT
PACKAGE
FIGURE F
cushcraft
COAT WITH SILICONE GREASE
(DO NOT coat the center pin or socket!)
cushcraft
#5 - FEEDLINE ASSEMBLY
Before attaching the feedline permanently, tune the antenna as
outlined on page 1. The 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 A50-5S.The shortest length of cable
will have the least loss. A connector boot is included for use with your
new antenna. (Figure F) Slide the boot over the cable before
attaching your PL-259. Coat only the outside connector threads and
shell with silicone grease. Do not coat the center pin or receptacle.
After the PL-259 is firmly screwed on to the antenna connector, slide
the vinyl boot over the connector and against the mast bracket. Tape
the feedline to the boom and down the mast. It's a good idea to form
a drip loop in the coax to help protect the connector from water
damage (figure G).
FIGURE G
MOUNTING
The mast mount bracket will accommodate up to a 2" OD (5.1 cm) mast. A 1-1/2" OD (3.8 cm) or larger heavy wall tubing mast should be used.
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 a minimum, place your antennas as far apart as you can.
SYSTEM GROUNDING
Direct grounding of the antenna, mast and tower is very important. This serves as protection from lightning strikes and static buildup, and from 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 #10AWG 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. Vertical polarization is normally used for FM. Other modes
use horizontal polarization. After the antenna is completely assembled, verify dimensions and element spacings for accuracy. Then, return to the
section below for final tuning.
TUNING PROCEDURE
If you wish to check the VSWR before installation, please observe the following procedures. Temporarily mount the antenna with the boom vertical,
reflector at least one foot (30 cm) off the ground on a non-metallic support (wooden box), to prevent detuning the antenna. Guy the top of the boom.
Do not use line with wire in it (some clotheslines have a wire core). Keep other antennas, metal objects and guy lines clear of the antenna under
test. Do not attempt to tune the Yagi near the ground with the boom parallel to the ground since ground effects 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 (305 cm) 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.
SPECIFICATIONS
Frequency
Number Elements
Forward Gain
Front to Back Ratio
SWR Typical
2:1 Bandwidth, MHz
Power
Boom Length
Longest Element
Turning Radius
Mast Size Range
Wind Surface Area
Weight
50-54 MHz
5
10.5 dBi
24 dB
1.2:1
>1
1000 Watts
12 ft. (3.7 m)
123" (312.4 cm)
7.8 ft. (2.37 m)
1.5-2.0 in (3.8-5.1 cm)
2.9 ft2. (.273 m2)
11 lb. (5.0 kg)
Measure the VSWR. If it is high, move the Reddi-Match clamp (69) by 1/4" (.6 cm) in one direction and check the VSWR. If the VSWR improved,
then continue moving the Reddi-Match clamp in the same direction. If the VSWR deteriorated 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. Then tighten all
connections. Tape the feedline to the boom and mast.
1
6
A505S
A505S
#3 - REDDI MATCH ASSEMBLY
Mount the Reddi Match to the driven element as shown in figure D. The
tuning strap (69) should already be on the element. Slide the Reddi
Match tube (RM) through the tuning strap (69). Connect the flattened
rod to the screw on the connector. Attach the driven element to the
boom using U-bolt (402) with lock washer (84) and hex nut (85) with the
connector facing the director elements. Slide the poly tube over the rod
up to the flattened end. Adjust to the dimensions shown in Table 1 for
horizontal polarization and Table 2 for vertical polarization. Tighten all
connectors.
NUT
69
941
11
After the Redd i-Match tube ha s
bee n atta che d to th e dr iven
element, adj ust the angle of the
tuning strap (69) to a point which
brings the Reddi-Match tube into
parallel with the driven element.
NOTE: For vertical polarization
th e Re dd i- Ma tc h as se mb ly
should point skyward.
9 010009 SS MACHINE 8-32 X 5/8" 2
941 011941 SS LOCK #8 3
11 010011 SS HEX 8-32 3
32 190032 U-BOLT 1-1/2" 1
69 200069 TUNING 1
9
SCREW (1.59 cm)
W ASHER
BRACKET (3.8 cm)
STRAP
402
FIGURE D
32
84
85
941
RM
11
X
EA
SET
KEY P/N DISP L A Y DESC SI Z E Q TYKEY P/N DISP L A Y DESC S I Z E Q TY
85 010085 HEX 1/4" 2
84 010084 LOCK 1/4" 2
402 010402 U-BOLTS 1-1/2" 1
CB A50CB CONNECTOR 1
RM REDDI MATCH 19" 1
CB
Poly Tube
Poly tube on Reddi-Match
should be touching the
flaired rod end.
NUT (.63 cm)
W ASHER (.63 cm)
(3.8 cm)
BRACKET
ASSY (48.3 cm)
KEY P/N DESCRIPTION QUANTITY
010009 8-32 x 5/8" (1.59 cm) stainless steel machine screw 2
9
11 010011 8-32 stainless steel hex nut 3
13 050013 1-1/4" (3.17 cm) plastic cap 2
27 050027
5/8" (1.59 cm) plastic caps
10
32 190032 1-1/2" (3.8 cm) heavy duty U-bolt brackets 5
33 190033 1-1/2" (3.8 cm) U-bolt backing plate 4
69 200069
70 190070
84 010084
85 010085
115 050115
240116
116
010118
118
119
010119
Formed aluminum tuning strap
4" x 6" (10.2 x 15.2 cm) formed mast plate
1/4" (.63 cm) stainless steel lock washer
1/4" (.63 cm) stainless steel hex nut
10
Connector boot
Silicone package 1
5/16" (.8 cm) stainless steel hex nut
5/16" (.8 cm) stainless steel lock washers 8
1
1
10
1
8
326 290326 Danger label 1
402 010402 1-1/2" (3.8 cm) stainless steel U-bolt 5
403 010403 1-5/8" (4.13 cm) stainless steel U-bolt 2
404 010404 2 1/8" x 3 3/4" (5.4 x 9.53 cm) stainless steel U-bolt 2
409 030409 3/4" (1.9 cm) stainless steel worm clamps 10
412 030412 1-3/8" (3.49 cm) stainless steel worm clamps 2
941 011941 #8 stainless steel lock washer 3
AA 1-3/8" x 50" (3.49 x 127 cm) aluminum tubing, slotted both ends 1
BB 1-1/4" x 50" (3.17 x 127 cm) aluminum tubing 2
EA 3/4" x 48" (1.9 x 121.9 cm) aluminum tubing slotted both ends 5
EB 5/8" x 40-1/2" (1.6 x 102.9 cm) aluminum tubing 2
EC 5/8" x 35-3/4" (1.6 x 90.8 cm) aluminum tubing 2
ED 5/8" x 33" (1.6 x 83.8 cm) aluminum tubing 2
EE 5/8" x 32-1/2" (1.6 x 82.5 cm) aluminum tubing 2
EF 5/8" x 32" (1.6 x 81.3 cm) aluminum tubing 2
CB Connector Bracket 1
RM Reddi Match tube Assembly 1
KEY P/N DISPLAY DESC SI Z E Q T Y
70 190070 MAST MT . 4" X 6" 1
PLA E (15.2 x 15.2 cm)
118 010118 HEX 5/16" 8
NUT (.8 cm)
119 010119 LOCK 5/16" 8
W ASHER (.8 cm)
326 290326 DANGER 1
LABEL
403 010403 U-BOLT 1-5/8 X 3 ” 2
(4.13 cm x 7.62 cm)
404 010404 U-BOLT 2 1/8" x 3 3/4 ” 2
(5.40 x 9.53 cm )
#4 - BOOM TO MAST ASSEMBLY
Mount the antenna to the mast at the location shown in Figures B
and B-2. Mounting hardware is shown below (Figure E).
FIGURE E
403
70
403
AA
119
119
118
MAST
404
119
118
326
5
118
#1 - BOOM ASSEMBLY
Place a mark 3 inches (7.6 cm) in from one end of the BB tubes. Next, place clamp (412) over the ends of the AA tube. Slide the BB tubes
into AA up to the 3" mark, check overall dimension and if correct, tighten clamps. Slide on end caps (13).
FIGURE A
144"
(3.66 m)
412
13
BB
3" Insert
(7.62 cm)
KEY P/N DISPLAY DESC SIZE QTY
AA ALUM 1-3/8" X 50" 1
BB ALUM 1-1/4" x 50" 2
TUBE (3.5 x 127 cm)
TUBING (3.17 x 127 cm)
AA
KEY P/N DISPLAY DESC SIZE QTY
13 050013 PLASTIC 1-1/4" 2
412 030412 TELESCOPE 1-3/8" 2
2
412
3" Insert
(7.62 cm)
BB
CAP (3.8 cm)
CLAMP (3.5 cm)
13
A505S
A505S
#2 - ELEMENT ASSEMBLY & MOUNTING
The elements are made up of one pre-drilled and slotted 3/4" (1.9 cm) O.D. center tube and two pre-cut 5/8" (1.59 cm) O.D. end tubes. Assemble
the elements using Figure B for horizontal polarization or Figure B-2 for vertical polarization. Slide the tuning strap (69) on one of the EA tubes.
This will be the driven element #2. Place telescope clamps (409) loosely on the slotted ends of all EA tubes. Note that the EC tubes must be used
with the EA tube on which you placed the tuning strap (69). Attach caps (27) to the end of each element. Mount the elements to the boom (Figure
C). Refer to figure D for mounting the dipole element with the connector bracket. Mount the connector with the threads (socket) pointing to the
mast mount. Adjust the antenna to your preferred portion of the 6 meter band using Table 1 if you've chosen horizontal polarization or Table 2 for
vertical polarization. Tighten all connections.
409
EE
ED
D2
REF
DE
#1 - REFLECTOR
27
#2 - DRIVEN
27
27
ELEMENT
#3 - DIRECTOR
D1
27
#4 - DIRECTOR
FIGURE B
Horizontal
Polarization
35"
(88.9 cm)
35"
(88.9 cm)
35"
(88.9 cm)
35"
(88.9 cm)
REF
EB EB
27
DE
EC EC
27
27
27
409
409
409
ED
D1
EE
D2
409
48"
(121.9 cm)
EA
BB
48"
(121.9 cm)
EA
EA
AA
EA
409
2"
(5.1 cm)
69
31.0"
(78.7 cm)
409
48"
(121.9 cm)
326
409
48"
(121.9 cm)
BB
FRONT
(121.9 cm)
#5 - DIRECTOR
D3
48"
D3
Table 2
Vertical Polarization
FIGURE B-2
(Vertical Polarization)
REF in. 37-1/2 35-1/2 33-1/2
27
409
EA
409
27
35"
(88.9 cm)
AA
326
(121.9 cm)
#3 - DIRECTOR
D1
48"
D1
ED
EA
409
ED
27
35"
(88.9 cm)
27
EF
409
EA
409
EF
27
BB
(121.9 cm)
D2
48"
D2
EE
EE
27
409
35"
(88.9 cm)
31"
(78.7 cm)
409
409
27
35"
(88.9 cm)
27
EC
DE
27
EB
REF
DE in. 30-3/4 30-3/4 30-3/4
D1 in. 30 28 26
D2
D3
409
69
BB
2"
(5.1 cm)
#1 - REFLECTOR#2 - DRIVEN ELEMENT#4 - DIRECTOR
EA
409
27
48"
(121.9 cm)
EA
EC
DE
48"
(121.9 cm)
EB
REF
Set in. 15-5/8 15-5/8 18
X in. 2 2 1-1/2
50 MHz- 51.5 MHz- 53 MHz
51.5 MHz 53 MHz 54 MHz
(cm) (95.25) (90.17) (85.09)
(cm) (78.10) (78.10) (78.10)
(cm) (76.2) (71.12) (66.04)
in. 29-1/2 27-1/2 25-1/2
(cm) (74.93) (69.85) (64.77)
in. 29 27 25
(cm) (73.66) (68.58) (63.5)
(cm) (39.69) (39.69) (45.72)
(cm) (5.08) (5.08) (3.81)
27
Table 1
Horizontal Polarization
50 MHz- 51.5 MHz- 53 MHz
51.5 MHz 53 MHz 54 MHz
REF in. 35-1/8 34 32-1/8
(cm) (89.22) (86.36) (81.60)
DE in. 31-3/4 28-3/8 26-7/8
(cm) (80.64) (72.07) (68.26)
D1 in. 29-3/4 27 26-1/4
(cm) (75.56) (68.58) (66.67)
D2 in. 29-3/4 24-7/8 24-5/8
(cm) (75.56) (63.18) (62.55)
D3 in. 25-5/8 24-1/2 23-1/2
(cm) (65.09) (62.23) (59.69)
Set in. 15-5/8 16-1/2 17
(cm) (39.69) (41.91) (43.18)
X in. 1-7/8 3 3
(cm) (4.76) (7.62) (7.62)
EF
D3
EA
48"
(121.9 cm)
409
FRONT
FIGURE C
3
27409
EF
D3
32
84
85
#5 - DIRECTOR
402
84
85
KEY P/N DISPLAY DESC SIZE QTY
EA ALUM 3/4" x 48" 5
EB ALUM 5/8" x 40-1/2" 2
EC ALUM 5/8" x 35-3/4" 2
ED ALUM 5/8" x 33" 2
EE ALUM 5/8" x 32-1/2" 2
33
EF ALUM 5/8" x 32" 2
27 050027 PLASTIC 5/8" 10
32 190032 U-BOLT 1-1/2" 5
TUBING (1.9 x 121.9 cm)
TUBING (1.6 x 102.9 cm)
TUBING (1.6 x 90.8 cm )
TUBING (1.6 x 83.8 cm )
TUBING (1.6 x 82.5 cm)
TUBING (1.6 x 81.3 cm )
CAP (1.59 cm)
BRACKET (3.8 cm)
KEY P/N DISPLAY DESC SIZE QTY
33 190033 BACKING 1-1/2" 4
69 200069 TUNING 1
85 010085 HEX 1/4" 10
84 010084 LOCK 1/4" 10
326 290326 DANGER 1
402 010402 U-BOLT 1-1/2" 5
409 030409 WORM 3/4" 10
PLATE (3.8 cm)
STRAP
NUT (.63 cm)
WASHER (.63 cm)
LABEL
(3.8 cm)
CLAMP (1.9 cm)
4
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