CUSHCRAFT R8 User Manual

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ASSEMBLY AND INSTALLATION
INSTRUCTIONS

6,10, 12, 15, 17, 20, 30, 40, Meters

951489 (12/99)

R8

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 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
BA
BB
BC
BD
BE
BF
BG
BH
SA
SB
SC
SD
SE
SF
SG
SH
BT1
BT2
MN8
XHR32
XHR40
09
11
26
28
32
63
64
73
74
76
87
96
99
105
115
116
120
160
220
231
232
233
326
389
404
405
407
409
410
411
412
413
428
657
940
941
4079
5072
5096
5097

PART#

DESCRIPTION

010009
010011
190026
190028
902832
170063
014764
194173
194174
054276
014387
010096
205099
055105
050115
240116
010120
190160
010220
010231
010232
010233
290326
014389
010404
010405
030407
030409
030410
030411
030412
030413
902428
194657
360940
011941
194079
205072
205096
205097

Base assembly
R8 Tube BB 1-1/4” x 72”( 3.17 x 182.9cm)
R8 Tube BC 1-1/8” x 72”(2.9 x 182.9cm)
R8 Tube BD 1” x 36” (2.5 x 91cm)
R8 Tube BE 7/8” x 16” (2.3 x 40.5cm)
R8 Tube BF 7/8” Swedged x 10-3/4” (2.3 x 27.3cm)
R8 Tube BG 1/2” x 24” (1.2 x 61cm)
R8 Tube BH 3/8” x 24” (0.9 x 61cm)
R8 Stub SA 3/8” x 52” (0.9 x 132cm)
R8 Stub SB 1/4” x 6” (0.6 x 15cm)
R8 Stub SC 3/8” x 48” (0.9 x 121.9cm)
R8 Stub SD 1/4” x 48” (0.6 x 121.9cm)
R8 Stub SE 1/4” x 12” (0.6 x 30cm)
R8 Stub SF 3/8” x 72” (0.9 x 182.8cm)
R8 Stub SG 3/8” x 43-1/2” (0.9 x 110.5cm)
R8 Stub SH 3/8” x 68” (0.9 x 173cm)
BT1 Trap 17 / 20 Meter
BT2 Trap 30 Meter
R8 Matching Network
32” X-Hat Rod
40” X-Hat Rod
# 8-32 x 5/8” SS RH MS
# 8-32 SS Hex Nut
Aluminum Bracket
Aluminum Half Washer
49” Whip & Tip Assembly
Extruded Aluminum V-Block
# 8-32 x 2-1/4” SS Machine Screw
Radial Ring Bracket
Radial Ring
3/8” x 7/8” Black plastic Cap
# 8-32 x SS/Nylon Hex Nut
# 8-32 x 3/8” SS RH MS
Aluminum Stub Clamp
1/4” Black Plastic Cap
Connector Boot
Silicone Package
# 8-32 x 2” SS RH MS
Matching Network Bracket
# 10-24 SS Hex Nut
# 8-32 x 1-3/4” SS RH MS
# 8-32 x 2-1/2” SS RH MS
# 10 SS Split Lock Washer
Danger Label
5/16-18 SS/Nylon Hex Nut
U-Bolt SS 5/16-18 3-1/4 (2-7/16 C-C)
U-bolt SS 5/16-18 4-1/2 (2-7/16 C-C)
Worm Clamp SS 7/32” - 5/8”
Worm Clamp SS 3/8” - 7/8”
Worm Clamp SS 7/16” - 1”
Worm Clamp SS 9/16” - 1-1/4”
Worm Clamp SS 11/16” - 1-1/2”
Worm Clamp SS 3/4” - 1-3/4”
Ground Strap
Aluminum L Bracket
# 8 Aluminum Flat Washer
# 8 SS Split Lock Washer
Aluminum Mounting Plate
4-Hole Insulator
3-Hole Insulator
2-Hole Insulator

QTY

2

1
1
1
1
1
1
1
1
1
6
1
1
1
2
1
1
1
1
1
2
2
12
18
4
4
7
4
2
4
2
1
21
4
2
4
1
1
1
1
1
7
6
1
8
8
2
2
10
2
3
2
1
1
1
6
12
18
1
1
1
1

R8

#1 - ASSEMBLE RADIAL
RINGS

Shorter
dimension
attaches to
radial ring.

FIGURE
A

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.

Longer dimension
attaches to base.

79
73

NOTE: Do not accidentally use the #10-24 nut in
this step.

P/N

BA

DISPLAY

DESC

SIZE

BASE
ASSEMBLY
RADIAL RING
BRACKET

4

74

194174

RADIAL RING

2

79

010079

SS MACHINE
SCREW

# 8-32 x 1/2
(1.3 cm)

4

87

014387

SS LOCK
NUT

# 8-32

14

SS MACHINE
SCREW

#8-32 x 3/8”
(.95 cm)

4

# 8-32 x 2-1/2"
(6.35 cm)

232

010232

SS MACHINE
SCREW

428

902428

GROUND STRAP

74
73

73

1

194173

010096

FIGURE
B

QTY

73

96

79
428

Insert four 2 1/2" screws (232) into the base assembly (BA) as
shown in Figure D. Secure with nuts (87).

KEY

73

73
87

87

96
96

FIGURE
C
87

87

6
1

232

232

FIGURE
D
232

87
232

87

232

87

232

87

87
87
BA

3

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.

DESC

SIZE

010011

SS HEX NUT

#8-32

32

902832

SS RADIAL

160

190160

MN8
BRACKET

87

014387

SS LOCK
NUT

120

010120

SS MACHINE
SCREW

326

290326

WARNING
LABEL

7

1

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).

KEY

P/N

11

DISPLAY

49"
(124.5 cm)

#8-32
# 8-32 x 2”
(5.1 cm)

1

MATCHING
NETWORK

220

010220

SS HEX NUT

#10-24

1

233

010233

SS SPLIT
LOCK WASHER

#10

1

941

011941

SS SPLIT
LOCK WASHER

#8

3

87

11

11

941

941

160

32

MN8
326

32

32
32

32

233
220

941
11

4

4

MN8

120

326

7

1

FIGURE E

326

3

MN

Attach warning labels (326) as shown.

326

QTY

326

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.

KEY

P/N

DISPLAY

DESC

SIZE

QTY

09

010009

SS Machine
Screw

# 8-32 x 5/8”
(1.6 cm

12

11

010011

SS HEX NUT

8-32

15

941

011941

SS Split Lock
Washer

#8

15

231

010231

SS Machine
Screw

8-32 x 1-3/4”
(4.45 cm)

657

194657

Aluminum
L Bracket

940

360940

Aluminum
Flat Washer

#8

12

BB

R8BB

R8 Tube

1-1/4” x 72”
(3.2 x 182.9 cm)

1

BC

R8BC

R8 Tube

1-1/8” x 72”
(2.9 x 182.9 cm)

1

5072

205072

4-Hole
Insulator

1

5096

205096

3-Hole
Insulator

1

5097

205097

2-Hole
Insulator

1

3
6

FIGURE F
657
2 PLACES

09
4 PLACES

940
4 PLACES
5097

941
231

11

941
4 PLACES
BC

BC

11
4 PLACES

BB

BB

09
4 PLACES
09
4 PLACES
657
2 PLACES

5096

11
231

940
4 PLACES

941

5072

941
11

657
2 PLACES

940
4 PLACES

941
4 PLACES
11
4 PLACES

5

231
941
4 PLACES
11
4 PLACES

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".

FIGURE G
BD
411

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
ASSEMBLY

BB

R8 TUBE BB

1-1/4” x 72”
(3.17 x 182.9 cm)

1

BC

R8 TUBE BC

1-1/8” x 72”
(2.9 x 182.9 cm)

1

BD

R8 TUBE BD

1” x 36”
(2.5 x 91 cm)

1

BC

1

411

030411

SS WORM
CLAMP

9/16” x 1-1/4”
(1.4 x 3.1 cm)

1

412

030412

SS WORM
CLAMP

11/16” x 1-1/2”
(0.7 x 3.8 cm)

1

413

030413

SS WORM
CLAMP

3/4” x 1-3/4”
(1.9 x 4.4 cm)

1

412

BB

BB
4-1/2”
INSERT
(11.4 cm)

413

BC

BA

BC
BA

8”
INSERT

BB

BB

6

R8
FIGURE H

#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
SCREW

#8-32 x 2-1/4”
(5.7 cm)

4

87

014387

SS NYLON
HEX NUT

#8-32

4

99

205099

ALUMINUM
STUB CLAMP

2

64

99

87

64

15-3/8”
(39.1 cm)

99

87

LOWER BRACKET
SITS FLUSH ON
BASE ASSEMBLY

7

R8

#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.

105

10” (25.4 cm)
EXPOSED

407
SE

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.

KEY

P/N

DISPLAY

DESC

SIZE

105
SD

SA

R8SA

R8 Stub SA

3/8” x 52”
(1 x 132 cm)

1

SB

R8SB

R8 Stub SB

1/4” x 6”
(0.6 x 15 cm)

2

SB

SB

407

SC

R8SC

R8 Stub SC

3/8” x 48”
(1 x 121.9 cm)

1

SD

R8SD

R8 Stub SD

3/8” x 48”
(1 x121.9 cm)

1

SE

R8SE

R8 Stub SE

1/4” x 12”
(.6 x 30.5 cm)

1

105

055105

Black Plastic Cap

1/4”
(.6 cm)

2

407

030407

SS Worm Clamp

7/32”-5/8”
(.6 x 1.6 cm)

4

3” (7.6 cm)
INSERT

SA
SC

407

SC
SA

6 Meter Tune Chart
Frequency (MHz)

3” (7.6 cm)
INSERT

SEE 6 METER
TUNE CHART

QTY

407

BB

99
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)

BA
NOTE: Stubs sit flush with bottom of

stub clamp.

FIGURE I
8

R8

#7 - ASSEMBLY OF 12 AND
15 METERS STUBS

KEY

Take 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.

P/N

DISPLAY

DESC

SIZE

QTY

SB

R8SB

R8 STUB SB

1/4” x 6”
(.6 x 15 cm)

4

105

055105

BLACK PLASTIC
CAP

1/4”
(.6 cm)

2

407

030407

SS WORM
CLAMP

7/32”-5/8”
(1.2 x 1.6 cm)

6

SF

R8SF

R8 STUB SF

3/8” x 72”
(1 x 182.9 cm)

2

SH

R8SH

R8 STUB SH

3/8” x 68”
(1 x173 cm)

1

SG

R8SG

R8 STUB SG

3/8” x 43-1/2”
(1 x110.5 cm)

1

Note: Make sure that all stubs are positioned around main radiator
as shown in Fig. J2

FIGURE J2

FIGURE J1

105

SB

105
SB
3-1/2” (8.9 cm)
EXPOSED

3-1/2” (8.9 cm)
EXPOSED

407

407
SG

SH

3” (7.6 cm)
INSERT

3” (7.6 cm)
INSERT

3” (7.6 cm)
INSERT

3” (7.6 cm)
INSERT
SB

SB
SF
SF

SF

SF

407
407

9

R8

#8 - ASEEMBLE X-HAT ON
BD TUBE
FIGURE K

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).

KEY

P/N

DISPLAY

DESC

SIZE

QTY

40” (101.6 cm)

2

XHR40

XHR40

X-Hat Rod

26

190026

Aluminum
Bracket

2

28

190028

Aluminum
Half Washer

2

87

014387

SS Nylon
Hex Nut

# 8-32

2

231

010231

SS RH
Machine Screw

#8-32 x 1-3/4”
(4.4 cm)

2

26

87

87
XRH40

26
28
28

231

XRH40

231
BD

10

R8

#9 - ASSEMBLE TRAPS

FIGURE L

Assemble traps (BT1) and (BT2) as shown in callout of Fig."L". Slide
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).

BT2

410
KEY

P/N

DISPLAY

DESC

SIZE

QTY

BT1

BT1 TRAP
17/20 METER

1

BT2

BT2 TRAP
30 METER

1

BE

R8 TUBE
BE

7/8” x 16”
(2.3 x 41 cm)

1

18”
(45.7 cm)

BE

410

410

030410

SS WORM
CLAMP

7/16”-1”
(1.1 x 2.5cm)

2

411

030411

SS WORM
CLAMP

9/16” x 1-1/4”
(1.4 x 3.2 cm)

1

BT1

411

#10 - ASSEMBLE TOP RADIATOR WITH X-HAT
Take 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.
KEY

P/N

DISPLAY

DESC

SIZE

QTY

32” (81 cm)

2

XHR32

XHR32

X-HAT ROD

26

190026

ALUMINUM
BRACKET

2

28

190028

ALUMINUM
Half Washer

2

76

054276

END CAP

3/8”
( 0.9 cm)

1

87

014387

SS NYLON
HEX NUT

# 8-32

2

010231

SS RH
MACHINE SCREW

# 8-32 x 1-3/4”
(4.4 cm)

2

409

030409

SS WORM
CLAMP

3/8”-7/8”
(0.9 x 2.2 cm)

1

410

030410

SS WORM
CLAMP

7/16”-1”
(1.1 x 2.5 cm)

1

BG

R8BG

R8 TUBE BG

1/2” x 24”
(1.3 x 61 cm)

1

BH

R8BH

R8 TUBE BH

3/8” x 24”
(0.9 x 61 cm)

1

76
SEE 40 METER
TUNE CHART

BH

409

231

22”
(55.4 cm)

BG

409
BF
26
26

XHR32

28

28

1”
(2.5 cm)
410
BT2

Frequency (MHz)
7.200
7.250
7.300

231

XHR32

231

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)

87

87

Length (In) (cm)
10” (23.4)
7” (17.8)
5” (12.7)

FIGURE M
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).

404

63

KEY

P/N

DESC

SIZE

63

170063

DISPLAY

V-BLOCK

2"
(5.1 cm)

QTY
4

389

014389

SS/NYLON
LOCK NUT

5/16"
(.8 cm)

8

404

010404

U-BOLT

5/16-18 x 3-1/4"
(6.2 x 8.2 cm)

2

405

010405

U-BOLT

5/16-18 x 4-1/2"
(6.2 x 11.4 cm)

2

4079

194079

MOUNTING
PLATE

1

WARNING
LABEL

1

389
389
63

326
404

405
389
63

326

290326

63

389

119
405

389
4079
389

Line bottom
of plate up
with bottom
of antenna.

Figure N

#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.

SILICONE
(116)
SILICONE GREASE

KEY

PART#

115

050115

116

240116

DESCRIPTION
cushcraft

SILICONE GREASE

SIZE

QTY

CONNECTOR
BOOT

1

SILICONE
PACKAGE

1

Figure O

12

cushcraft

115

DO NOT COAT
CENTER PIN
WITH SILICONE!

R8 SPECIFICATIONS
Frequency, meters
Gain, dBi
VSWR 2:1 bandwidth, KHz

VSWR at resonance (typical)
Power Rating, Watts CW
Vertical Radiation angle, deg.
Horizontal rad, deg.
Height, ft(m)
Wind survival
Weight, lb. (kg)

6,10,12,15,17,20,30,40
3
40m (150)
30m (>50)
20m (>350)
17m (>100)
15m (>450)
12m (>100)
10m (>1500)
6m (>1500)
1.3:1
1500
16
360
28.5 max. (8.7)
80 mph
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.

LIMITED WARRANTY
Cushcraft Corporation, 48 Perimeter Road, Manchester, New Hampshire 03103, warrants to the original purchaser for one
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.

48 PERIMETER ROAD, MANCHESTER, NH 03103 USA
TELEPHONE: 603-627-7877 • FAX: 603-627-1764 • E-mail: techsup@cushcraft.com
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
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