ASSEMBLY AND INSTALLATION
INSTRUCTIONS
6,10, 12, 15, 17, 20, 30, 40, Meters
951489 (9/01)
R8
WARNING
THIS ANTENNA IS AN ELECTRICAL CONDUCTOR. CONTACT WITH POWER LINES CAN RESULT IN DEATH, OR SERIOUS INJURY.
DO NOT INST ALL THIS ANTENNA WHERE THERE IS ANY POSSIBILITY OF CONTACT WITH HIGH VOLTAGE OR 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.
Your Cushcraft R8 vertical antenna is designed and manufactured to give trouble free service. This antenna
will perform as specified if the instructions and suggestions in this manual are followed and care is used
in the assembly and installation. When checking the components received in your antenna package use
the parts listed beside each diagram. There is a master parts list on page 2. 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.
PLANNING
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 the boss and that they must follow your
instructions. If you have any doubts at all, employ a professional antenna installation company to install
your antenna.
LOCATION
Although the R8 will operate in almost any location, it will perform best if it is mounted vertically and located
in the clear away from surrounding objects such as buildings, trees, power lines, towers, guy wires, antennas
and metallic objects.
EXTREME CARE MUST BE USED FOR YOUR SAFETY. YOU MUST INSURE THAT WHILE THE R8
IS IN OPERATION NEITHER PEOPLE NOR PETS CAN COME IN CONTACT WITH ANY PORTION OF
YOUR ANTENNA INCLUDING THE COUNTERPOISE RODS. 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 ARE SEVEN
WARNING STICKERS WHICH MUST BE ATTACHED TO THE ENDS OF THE COUNTERPOISE RODS
AS SHOWN IN FIGURE E.
MOUNTING
Your mast should be rigid and pointing straight up. Always use a mast at least 1-3/4 inches (4.4 cm) but
not larger than 2-1/8 inches (5.4 cm) in diameter. If you guy the mast, use nonconducting guy wires.
SYSTEM GROUNDING
Direct grounding of the antenna mast is very important. This serves as protection from lightning strikes
and static buildup, and from high voltages which may be present in the equipment attached to the antenna.
A good electrical connection should be made to one or more ground rods directly at the base of the antenna
or mast using a least #10 AWG ground wire and noncorrosive hardware. For details and safety standards,
consult the National Electrical Code. You should also use a coaxial lightning arrestor. Cushcraft offers
several different models, such as the LAC-1, LAC-2 or the LAC-4 series.
ASSEMBLY
Assemble your R8 by following steps 1 through 12. After assembling the antenna, verify all dimensions
for accuracy.
1
R8
MASTER PARTS LIST
KEY PART# DESCRIPTION QTY
BA Base assembly 1
BB R8 Tube BB 1-1/4” x 72”( 3.17 x 182.9cm) 1
BC R8 Tube BC 1-1/8” x 72”(2.9 x 182.9cm) 1
BD R8 Tube BD 1” x 36” (2.5 x 91cm) 1
BE R8 Tube BE 7/8” x 16” (2.3 x 40.5cm) 1
BF R8 Tube BF 7/8” Swedged x 10-3/4” (2.3 x 27.3cm) 1
BG R8 Tube BG 1/2” x 24” (1.2 x 61cm) 1
BH R8 Tube BH 3/8” x 24” (0.9 x 61cm) 1
SA R8 Stub SA 3/8” x 52” (0.9 x 132cm) 1
SB R8 Stub SB 1/4” x 6” (0.6 x 15cm) 6
SC R8 Stub SC 3/8” x 48” (0.9 x 121.9cm) 1
SD R8 Stub SD 1/4” x 48” (0.6 x 121.9cm) 1
SE R8 Stub SE 1/4” x 12” (0.6 x 30cm) 1
SF R8 Stub SF 3/8” x 72” (0.9 x 182.8cm) 2
SG R8 Stub SG 3/8” x 43-1/2” (0.9 x 110.5cm) 1
SH R8 Stub SH 3/8” x 68” (0.9 x 173cm) 1
BT1 BT1 Trap 17 / 20 Meter 1
BT2 BT2 Trap 30 Meter 1
MN8 R8 Matching Network 1
XHR32 32” X-Hat Rod 2
XHR40 40” X-Hat Rod 2
09 010009 # 8-32 x 5/8” SS RH MS 12
11 010011 # 8-32 SS Hex Nut 18
26 190026 Aluminum Bracket 4
28 190028 Aluminum Half Washer 4
32 902832 49” Whip & Tip Assembly 7
63 170063 Extruded Aluminum V-Block 4
64 014764 # 8-32 x 2-1/4” SS Machine Screw 2
73 194173 Radial Ring Bracket 4
74 194174 Radial Ring 2
76 054276 3/8” x 7/8” Black plastic Cap 1
79 010079 # 8-32” x 1/2” SS RH MS 4
87 014387 # 8-32 x SS/Nylon Hex Nut 21
96 010096 # 8-32 x 3/8” SS RH MS 4
99 205099 Aluminum Stub Clamp 2
105 055105 1/4” Black Plastic Cap 4
115 050115 Connector Boot 1
116 240116 Silicone Package 1
120 010120 # 8-32 x 2” SS RH MS 1
160 190160 Matching Network Bracket 1
220 010220 # 10-24 SS Hex Nut 1
231 010231 # 8-32 x 1-3/4” SS RH MS 7
232 010232 # 8-32 x 2-1/2” SS RH MS 6
233 010233 # 10 SS Split Lock Washer 1
326 290326 Danger Label 8
389 014389 5/16-18 SS/Nylon Hex Nut 8
404 010404 U-Bolt SS 5/16-18 3-1/4 (2-7/16 C-C) 2
405 010405 U-bolt SS 5/16-18 4-1/2 (2-7/16 C-C) 2
407 030407 Worm Clamp SS 7/32” - 5/8” 10
409 030409 Worm Clamp SS 3/8” - 7/8” 2
410 030410 Worm Clamp SS 7/16” - 1” 3
411 030411 Worm Clamp SS 9/16” - 1-1/4” 2
412 030412 Worm Clamp SS 11/16” - 1-1/2” 1
413 030413 Worm Clamp SS 3/4” - 1-3/4” 1
428 902428 Ground Strap 1
657 194657 Aluminum L Bracket 6
940 360940 # 8 Aluminum Flat Washer 12
941 011941 # 8 SS Split Lock Washer 18
4079 194079 Aluminum Mounting Plate 1
5072 205072 4-Hole Insulator 1
5096 205096 3-Hole Insulator 1
5097 205097 2-Hole Insulator 1
2
R8
#1 - ASSEMBLE RADIAL
RINGS
Figures A through D show the steps for radial ring assembly. Refer
to the parts table below for the parts required in this step. Slide
the two radial rings (74) onto the base assembly (BA). Note the
orientation of the ring slots. Attach the rings to the base using the
radial ring brackets (73), 2 1/2" screws (232), 1/2" screws (79)
and lock nuts (87). Leave hardware loose until Step #2. Note the
proper orientation of the radial ring brackets in Figure A. Install
ground strap (428) as shown in Figure D.
NOTE: Do not accidentally use the #10-24 nut in
this step.
Insert four 2 1/2" screws (232) into the base assembly (BA) as
shown in Figure D. Secure with nuts (87).
KEY P/N DISPLAY DESC SIZE QTY
BA BASE 1
73 194173 RADIAL RING 4
74 194174 RADIAL RING 2
79 010079 SS MACHINE # 8-32 x 1/2 4
87 014387 SS LOCK # 8-32 14
96 010096 SS MACHINE #8-32 x 3/8” 4
232 010232 SS MACHINE # 8-32 x 2-1/2" 6
428 902428 GROUND STRAP 1
ASSEMBLY
BRACKET
SCREW (1.3 cm)
NUT
SCREW (.95 cm)
SCREW (6.35 cm)
FIGURE
A
FIGURE
B
FIGURE
C
FIGURE
232
D
Longer dimension
attaches to base.
79
73
87
96
87
Shorter
dimension
attaches to
radial ring.
73
73
73
79
428
74
73
87
96
87
232
232
87
87
232
232
3
87
87
BA
87
232
87
R8
#2 - ATTACH MATCHING
NETWORK AND RADIALS
Slide upper matching network bracket (160) onto base section
(BA). Place it tight against the fiberglass insulator. Insert one
2" screw (120) into bracket (160) and attach nut (87) as
shown in Figure E. Slide Matching Network screws into holes
on upper matching network bracket (160). Position bottom MN
bracket over captive screw in base section (BA) and secure
with #10 nut (220) and a #10 lock washer (233).
Secure MN to upper MN bracket (160) with two nuts (11) and
lock washer (941). Tighten screw in upper MN bracket (160).
The radial rods may be inserted into the base section at any
time in the assembly process.
One at a time, place the stainless radial rods (32) into the
slots in the radial rings. Tighten the corresponding ring screws
as you work your way around the rings. The radial rings do
not have to touch each other to secure the radial rods properly.
Do not overtighten the screws. When all rods are secure,
tighten all hardware on the base section. Attach jumper strap
(428) to MN screw with nut (11) and lock washer (941).
Attach warning labels (326) as shown.
FIGURE E
KEY P/N DISPLAY DESC SIZE QTY
11 010011 SS HEX NUT #8-32 3
32 902832 SS RADIAL 49" 7
190160160
87 014387 SS LOCK #8-32 4
120 010120 SS MACHINE # 8-32 x 2” 1
326 290326 WARNING 7
MN MN8 MATCHING 1
220 010220 SS HEX NUT #10-24 1
233 010233 SS SPLIT #10 1
941 011941 SS SPLIT #8 3
MN8
BRACKET
NUT
SCREW (5.1 cm)
LABEL
NETWORK
LOCK WASHER
LOCK WASHER
(124.5 cm)
1
326
326
326
32
32
120
32
32
233
87
220
11
941
160
11
941
MN8
32
941
11
326
326
4
R8
#3 - ASSEMBLE PLASTIC
SPACERS TO RADIAL RINGS
Place the aluminum L-brackets (657) on tube (BB) and secure them
with hardware (231,941&11). Repeat this as well on tube (BC) as
shown on Fig. "F". Slide the 4-hole insulator (5072) on tube (BB)
and secure it with applicable hardware ( 09, 940,941 & 11). Repeat
the same with two and three hole insulators (5096 & 5097) on
tube (BC) according the Fig. "F".
NOTE: Make sure that the tubes are oriented with the slotted ends
on the top when you start assembling the hardware onto them.
FIGURE F
KEY P/N DISPLAY DESC SIZE QTY
09 010009 SS Machine # 8-32 x 5/8” 12
11 010011 SS HEX NUT 8-32 15
941 011941 SS Split Lock # 8 15
231 010231 SS Machine 8-32 x 1-3/4” 3
657 194657 Aluminum 6
940 360940 Aluminum # 8 12
BB R8BB R8 Tube 1-1/4” x 72” 1
BC R8BC R8 Tube 1-1/8” x 72” 1
5072 205072 4-Hole 1
5096 205096 3-Hole 1
5097 205097 2-Hole 1
Screw (1.6 cm
Washer
Screw (4.45 cm)
L Bracket
Flat Washer
(3.2 x 182.9 cm)
(2.9 x 182.9 cm)
Insulator
Insulator
Insulator
940
4 PLACES
657
09
4 PLACES
2 PLACES
5097
941
11
231
941
4 PLACES
BB
BB
BC
BC
11
4 PLACES
09
4 PLACES
09
4 PLACES
940
4 PLACES
657
2 PLACES
657
2 PLACES
5072
941
11
231
941
941
11
231
4 PLACES
11
940
4 PLACES
5096
941
4 PLACES
11
4 PLACES
4 PLACES
5
4-1/2”
INSERT
(11.4 cm)
BA
BB
8”
INSERT
BB
BC
BB
BC
R8
#4 - ASSEMBLE RADIATOR TUBES
Slide the Tube BD into tube BC until it hits the inner tube, and secure it
with worm clamp (411). Slide this assembly into tube BB and secure it
with worm clamp (412). Make sure that plastic insulators are aligned as
shown in Fig. "G".
Insert assembly consisted of tubes BD, BC and BB 4 -1/2 " into base
assembly (BA) and secure it with worm clamp (413).We recommend
that you use workhorses or two chairs to place this assembly in a horizontal
position . You may or may not attach the stainless radial rods (32) to the
base assembly (BA) at this time as mentioned in Section #2 of this
manual.
KEY P/N DISPLAY DESC SIZE QTY
BA BASE 1
BB R8 TUBE BB 1-1/4” x 72” 1
BC R8 TUBE BC 1-1/8” x 72” 1
BD R8 TUBE BD 1” x 36” 1
411 030411 SS WORM 9/16” x 1-1/4” 1
412 030412 SS WORM 11/16” x 1-1/2” 1
413 030413 SS WORM 3/4” x 1-3/4” 1
ASSEMBLY
(3.17 x 182.9 cm)
(2.9 x 182.9 cm)
(2.5 x 91 cm)
CLAMP (1.4 x 3.1 cm)
CLAMP (0.7 x 3.8 cm)
CLAMP (1.9 x 4.4 cm)
FIGURE G
BD
411
BC
412
BB
413
BA
6
R8
#5 - ASSEMBLE METAL
CLAMPS ON TO RADIATOR
As the antenna radiator sits on workhorses or pair of chairs place the
aluminum stub clamps (99) on radiator according the Fig. "H". Make
sure the clamps are aligned as shown. Leave the hardware on clamps
(64, 87) slightly loose to allow you insert the stub tubes later.
KEY P/N DISPLAY DESC SIZE QTY
64 014764 SS MACHINE #8-32 x 2-1/4” 4
87 014387 SS NYLON #8-32 4
99 205099 ALUMINUM 2
SCREW (5.7 cm)
HEX NUT
STUB CLAMP
FIGURE H
99
64
99
87
87
64
15-3/8”
(39.1 cm)
LOWER BRACKET
SITS FLUSH ON
BASE ASSEMBLY
7
#6 - ASSEMBLY OF 6 AND
10 METERS STUBS
Take the (SA) tube and slide it through the 4-hole insulator and secure
it in the bottom aluminum stub clamp as shown in Fig. "I". Make sure
that the slotted end of (SA) tube protrudes beyond the 4-hole insulator
and the opposite end of (SA) tube is mounted flush with the bottom
of the stub clamp (see callout at bottom of Fig I). In same fashion
slide the tube (SC) and secure it on other side of bottom aluminum
stub clamp. Align the bottom stub clamp with plastic insulators and
secure it tight. Slide the 6" rod (SB) into tube (SA) and secure with
worm clamp (407). Use 6 Meter tuning chart to adjust the stub (SB)
for selected portion of the band. Place the protective plastic cap on
top of (SB) tuning rod to complete the 6 Meter stub.
Take another 6" rod (SB) and slide it 3" into tube (SC) and secure with
worm clamp (407) as shown in callout of Fig. "I". Slide the tube (SD)
through 3-hole plastic insulator and assemble with worm clamp (407)
over other end of rod (SB). Insert rod ( SE) into tube (SD) as shown
,and complete the 10 Meter stub by placing the protective plastic cap
on top.
R8
105
SD
105
10” (25.4 cm)
EXPOSED
407
SE
407
KEY P/N DISPLAY DESC SIZE QTY
SA R8SA R8 Stub SA 3/8” x 52” 1
SB R8SB R8 Stub SB 1/4” x 6” 2
SC R8SC R8 Stub SC 3/8” x 48” 1
SD R8SD R8 Stub SD 3/8” x 48” 1
SE R8SE R8 Stub SE 1/4” x 12” 1
105 055105 Black Plastic Cap 1/4” 2
407 030407 SS Worm Clamp 7/32”-5/8” 4
6 Meter Tune Chart
Frequency (MHz) Length
50.250 4-1/2” (11.4 cm)
50.800 3-1/2” (8.9 cm)
51.500 2-1/2” (6.4 cm)
52.500 1-1/2” (13.8 cm)
53. 500 1/2” (1.3 cm)
(1 x 132 cm)
(0.6 x 15 cm)
(1 x 121.9 cm)
(1 x121.9 cm)
(.6 x 30.5 cm)
(.6 cm)
(.6 x 1.6 cm)
SEE 6 METER
TUNE CHART
407
SA
SB
3” (7.6 cm)
INSERT
3” (7.6 cm)
INSERT
SC
SC
SA
99
NOTE:
SB
407
BB
BA
Stubs sit flush with bottom of
stub clamp.
FIGURE I
8
R8
#7 - ASSEMBLY OF 12 AND
15 METERS STUBS
T ake two tubes (SF) and slide them through 4-hole plastic insulator
and secure in top stub clamp as shown in Fig. J1. Insert two
6"rods (SB) in (SF) tubes and place the worm clamps (407) as
shown in callout at Fig. J2. Place tube (SH) on left side stub as
shown in Fig. J2, sliding it through 2 and 3 hole plastic insulators.
Insert tube (SG) on the right side stub as shown and secure with
worm clamp. Take two (SB) rods and insert them on top of these
two stubs as shown in top callouts of Fig. J2 along with protective
end caps.
Note: Make sure that all stubs are positioned around main radiator
as shown in Fig. J2
FIGURE J1
KEY P/N DISPLAY DESC SIZE QTY
SB R8SB R8 STUB SB 1/4” x 6” 4
105 055105 BLACK PLASTIC 1/4” 2
407 030407 SS WORM 7/32”-5/8” 6
SF R8SF R8 STUB SF 3/8” x 72” 2
SH R8SH R8 STUB SH 3/8” x 68” 1
SG R8SG R8 STUB SG 3/8” x 43-1/2” 1
FIGURE J2
105
3-1/2” (8.9 cm)
EXPOSED
SB
(.6 x 15 cm)
CAP (.6 cm)
CLAMP (1.2 x 1.6 cm)
(1 x 182.9 cm)
(1 x173 cm)
(1 x110.5 cm)
SB
105
3-1/2” (8.9 cm)
EXPOSED
SF
SF
3” (7.6 cm)
INSERT
3” (7.6 cm)
INSERT
407
407
SH
SB
SF
407
SG
3” (7.6 cm)
INSERT
3” (7.6 cm)
INSERT
SB
SF
407
9
#8 - ASEEMBLE X-HAT ON
BD TUBE
Install 2 X hat rods (XHR40) as shown in figure K, using aluminum
bracket, (26), aluminum half washers (28), and fasten with screw
(231) and lock nut (87).
R8
FIGURE K
KEY P/N DISPLAY DESC SIZE QTY
XHR40 XHR40 X-Hat Rod 40” (101.6 cm) 2
26 190026 Aluminum 2
28 190028 Aluminum 2
87 014387 SS Nylon # 8-32 2
231 010231 SS RH #8-32 x 1-3/4” 2
87
26
Bracket
Half Washer
Hex Nut
Machine Screw (4.4 cm)
26
87
XRH40
NOTE
If you are using the
optional Guy Kit
(R8GK), install clamp
below X-hat rods.
28
231
BD
28
XRH40
231
10
R8
#9 - ASSEMBLE TRAPS
Assemble traps (BT1) and (BT2) as shown in callout of Fig."L". Slide
FIGURE L
BT2
this assembly into top tube (BD) of main radiator assembly until it hits
the screws of X-hat assembly and secure it with worm clamp (411).
410
18”
(45.7 cm)
KEY P/N DISPLAY DESC SIZE QTY
BT1 BT1 TRAP 1
BT2 BT2 TRAP 1
BE R8 TUBE 7/8” x 16” 1
410 030410 SS WORM 7/16”-1” 2
411 030411 SS WORM 9/16” x 1-1/4” 1
17/20 METER
30 METER
BE (2.3 x 41 cm)
CLAMP (1.1 x 2.5cm)
CLAMP (1.4 x 3.2 cm)
BE
410
BT1
411
#10 - ASSEMBLE TOP RADIATOR WITH X-HAT
T ake the tube (BG) and insert 2" into swedged tube (BF). Secure assembly
with worm clamp (409). Slide tube (BH) into tube (BG) and adjust for
selected portion of 40 Meters band according the 40 Meter Tuning chart.
Install X-hats (XHR32) on swedged tube (BF) as shown in callout of
Fig."M". Take this assembly and slide it over top trap (BT2) spacing the
edge of (BF) 1" of the trap cap.
BH
76
SEE 40 METER
TUNE CHART
KEY P/N DISPLAY DESC SIZE QTY
XHR32 XHR32 X-HAT ROD 32” (81 cm) 2
26 190026 ALUMINUM 2
28 190028 ALUMINUM 2
76 054276 END CAP 3/8” 1
87 014387 SS NYLON # 8-32 2
231 010231 SS RH # 8-32 x 1-3/4” 2
409 030409 SS WORM 3/8”-7/8” 1
410 030410 SS WORM 7/16”-1” 1
BG R8BG R8 TUBE BG 1/2” x 24” 1
BH R8BH R8 TUBE BH 3/8” x 24” 1
40 Meter Tune Chart
Frequency (MHz) Length (In) (cm)
7.025 20” (50.8)
7.050 18.5” (47.0)
7.100 16” (40.6)
7.150 13” (33.0)
BRACKET
Half Washer
( 0.9 cm)
HEX NUT
MACHINE SCREW (4.4 cm)
CLAMP (0.9 x 2.2 cm)
CLAMP (1.1 x 2.5 cm)
(1.3 x 61 cm)
(0.9 x 61 cm)
Frequency (MHz) Length (In) (cm)
7.200 10” (23.4)
7.250 7” (17.8)
7.300 5” (12.7)
(55.4 cm)
BF
87
26
28
231
1”
(2.5 cm)
FIGURE M
22”
BT2
26
409
BG
409
28
XHR32
87
XHR32
231
410
11
R8
#11 -BASE TO MAST ASSEMBLY
Attach the antenna base to your mast as shown in Figure N. First attach
the mounting plate (4079) with U-bolts (404), aluminum V-blocks (63), and
nut (389) to the antenna base. The bottom of the plate should should be
even with the bottom of the antenna to leave room for the radial clamping
system. Affix danger label (326) to the antenna so that is easy to see.
When attaching mounting plate to the mast use the (405) U-bolts, aluminum
V-blocks (63), and nut (389).
KEY P/N DISPLAY DESC SIZE QTY
63 170063 V-BLOCK 2" 4
389 014389 SS/NYLON 5/16" 8
404 010404 U-BOLT 5/16-18 x 3-1/4" 2
405 010405 U-BOLT 5/16-18 x 4-1/2" 2
4079 194079 MOUNTING 1
326 290326 WARNING 1
LOCK NUT (.8 cm)
PLATE
LABEL
(5.1 cm)
(6.2 x 8.2 cm)
(6.2 x 11.4 cm)
405
405
404
63
389
63
389
63
389
4079
389
389
326
404
389
63
119
Line bottom
of plate up
with bottom
of antenna.
#12 - FEEDLINE
The R8 is designed for use with 50 Ohm coaxial cable terminated with a
PL-259 connector. The shortest length of cable will have the least loss.
A connector boot is included for use with your new antenna (figure O).
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 onto the
antenna connector, slide the vinyl boot over the connector and against the
connector bracket for a good weather-tight connection. After the antenna
is on the mast, tape the feedline to the mast. If you plan to install the
antenna in a salty or corrosive environment, you may want to consider
coating it with a clear marine varnish or equivalent after it is assembled.
KEY PART# DESCRIPTION SIZE QTY
115 050115 CONNECTOR 1
116 240116 SILICONE 1
cushcraft
SILICONE GREASE
BOOT
PACKAGE
Figure N
Figure O
115
cushcraft
SILICONE
(116)
SILICONE GREASE
DO NOT COAT
CENTER PIN
WITH SILICONE!
12
R8 SPECIFICATIONS
Frequency, meters 6,10,12,15,17,20,30,40
Gain, dBi 3
VSWR 2:1 bandwidth, KHz 40m (150)
30m (>50)
20m (>350)
17m (>100)
15m (>450)
12m (>100)
10m (>1500)
6m (>1500)
VSWR at resonance (typical) 1.3:1
Power Rating, Watts CW 1500
Vertical Radiation angle, deg. 16
Horizontal rad, deg. 360
Height, ft(m) 28.5 max. (8.7)
Wind survival 80 mph
Weight, lb. (kg) 23 (10.5)
The Electrical Specifications for all Cushcraft Amateur Antennas are derived from numerical
analysis and measured data taken on our test range. Performance may vary due to the random
variables associated with a specific application or installation.
Cushcraft Corporation, 48 Perimeter Road, Manchester, New Hampshire 03103, warrants to the original purchaser for one
LIMITED WARRANTY
year from date of purchase that each Cushcraft antenna is free of defects in material or workmanship. If, in the judgement
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 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 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 the misuse, neglect, accident or improper installation. Any repairs or alterations
outside of the Cushcraft factory will nullify this warranty.
TELEPHONE: 603-627-7877 • FAX: 603-627-1764 • E-mail: techsup@cushcraft.com
48 PERIMETER ROAD, MANCHESTER, NH 03103 USA
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
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