CUSHCRAFT MA160V Instruction manual

Assembly and Installation Instructions
Cushcraft MA160V Vertical DX Antenna
160-Meter Vertical Monopole Antenna
956895_GF_AB

General Description: The MA160V is a compact efficient vertical especially designed for working top-band
DX from an average-size house lot. A low launch angle and deep overhead null combine to pull in distant
stations while rejecting local QRM. The MA160V features a heavy-duty high-Q copper loading coil plus a
wide 100-inch diameter stainless capacitive hat for high efficiency, resiliency and 1500-Watt PEP power
handling. An adjustable stinger provides coverage on any 40-kHz segment across the 1.8 – 2.0 MHz band.
Weighing only 12-pounds, the MA160V installs easily and blends in with backyard trees and vegetation.
Each antenna comes with a 400-foot spool of ground-radial wire plus a Danscord™ insulated guying kit.
Parts List: Before assembling, read manual thoroughly and check contents against the parts list below:
X Quan. Part # Description
Hardware and Parts
[ ] 16 010009 5/8” x 8-32 screw
[ ] 2 010123 1-1/2” x 8-32 screw
[ ] 2 010231 1-3/4” x 8-32 screw
[ ] 2 010120 2” x 8-32 screw
[ ] 1 010232 2-1/2” x 8-32 screw
[ ] 25 010011 Hex nut, 8-32
[ ] 19 011941 Split lock washer, #8
[ ] 14 100449 Star-locking solder lug
[ ] 4 360941 Alum flat washer, #10
[ ] 2 320056 Alum Spacer, 1/4” x 5/16”
[ ] 2 105630 1/2” x 1/4” OD loading coil standoff spacer.
[ ] 2 194173 Small 90-degree aluminum bracket
[ ] 7 030412 Large worm clamp
[ ] 3 030407 Small worm clamp
[ ] 1 902428 Braid strap
[ ] 8 056249 Vinyl radial-rod cap
[ ] 1 055105 1/4” ID black vinyl tip cap
[ ] 3 193631 Aluminum guy-line bracket
[ ] 3 024259 Guy-line thimble
[ ] 3 195179 steel guy-line anchor stake
[ ] 1 MA160VGW 100-foot roll, Danscord-D30
[ ] 1 156336 1/2” ID tuning stub bushing
[ ] 1 MA160VCA1 160-meter loading coil assembly
[ ] 8 221186 Stainless steel radial-rod stock, 0.1” X 48”
[ ] 3 194174 8-hole radial ring
[ ] 2 196242 Upper radial ring support bracket
[ ] 1 096359 Radial wire kit (400’ spool, #18 solid enamel)
Tubes:
[ ] 1 126854 Fiberglass resonator support tube, 1” OD x 16”
[ ] 1 126241 Fiberglass base insulator tube, 1.25” OD x 16”
[ ] 1 MA8040VBAB Aluminum base section, 12” x 1-3/8” OD (NS/2SH)
[ ] 1 MA8040VBAT Aluminum radiator section, 1-3/8” OD x 36” tube (2SH/4S)
[ ] 2 MA8040VBB Aluminum radiator splice, 1-1/4” OD x 12” tube (NS/NS)
[ ] 2 MA8040VBC Aluminum radiator section, 1-3/8” OD x 72” tube (42/4S)
[ ] 1 MA8040VBD Aluminum radiator section, 1-1/4” OD x 72” tube (NS/4S)
[ ] 1 MA8040VBE Aluminum radiator section, 1-1/8” OD x 72” tube (NS/2SH)
[ ] 1 MA160VBI Aluminum resonator section, 1/2” OD x 36” tube (H/2S)
[ ] 1 MA160VBJ Aluminum resonator section, 3/8” OD x 36” tube (NS/2S)
[ ] 1 MA160VBK Aluminum resonator section, 1/4” OD x 41” aluminum rod
Tube Identification Code: Describes how tube ends are prepared to aid identification.
NS = no compression slots, 2S = 2 compression slots, 4S = 4 compression slots, H= screw hole.
Example: the MA8040VBAT is coded 2SH/4S. Code means base end has 2 slots plus a screw hole and top
end has 4 compression slots. Tubes with MA8040V part numbers are interchangeable with the MA160V.

Assembly Instructions- MA160V
Step 1: Using the items listed below, install aluminum tubes on base insulator.
1 MA8040VBAB 12” x 1-3/8” OD aluminum base section (NS/2SH)
1 MA8040VBAT 36” x 1-3/8” OD aluminum antenna section (2SH/4S)
1 126241 16” x 1-1/4” OD fiberglass base insulator
2 010231 1-3/4” x 8-32 screw
2 010011 8-32 nut
2 011941 #8 lock washer
[ ] Identify lower end of the base insulator (two thru-holes offset by 90°).
[ ] Install 2-slot end of 12” base section over insulator and align screw holes.
[ ] Insert 1-3/4” screw at A. Secure with lock washer and nut.
[ ] Install 2-slot end of 36” radiator section over opposite end of the insulator and align screw hole.
[ ] Insert a 1-3/4” screw at B. Secure with a lock washer and nut.
1-3/4" x 8-32
1-3/4" x 8-32
Split LW
Nut
1" Gap
A
B
Align
Holes
Insulator
Antenna
Tube
Base
Tube
Align
Holes
Middle
Bottom
Top
BAB
BAT
Split LW
Nut
FIG-1: Base Insulator Assembly
Step-2: Assemble and install ground-radial attachment ring on base assembly.
1 010232 2-1/2” x 8-32 SS screw
8 010009 5/8” x 8-32 SS screw
9 011941 #8 lock washer
9 010011 8-32 nut
2 360941 #10 Flat aluminum spacer washer
2 320056 1/4” spacer
1 194174 8-hole radial ring
2 194173 Small 90-degree aluminum bracket
[ ] Find the 2-1/2” screw, two small 90° angle brackets, and two 1/4” spacers.
[ ] Note that the angle brackets have unequal sides. Identify long side of each.
[ ] On the 2-1/2” screw, install the bracket (long side), a #10 aluminum spacer washer, and a 1/4” spacer.
[ ] Insert screw through base tube as shown at A.
[ ] Install other 1/4” spacer, #10 spacer washer, and bracket (long side) on protruding end of screw.
[ ] Position brackets as shown and secure firmly using a lock washer and nut.
[ ] Insert two (2) 5/8” screws through angle brackets and place radial ring on top (B).
[ ] Secure radial ring in place with lock washers and nuts (2 places)
[ ] Install six 5/8” screws in open holes, secure with lock washers and nuts (C).
2-1/2" x 8-32
Small 90-deree Bracket
1/4" spacer
#8 lockwasher
#8 nut
Base Tube
5/8" x 8-32
#8 nut
lockwasher
Radial Ring
#8 nut
lockwasher
A
BC
#10 flat washer
5/8" x 8-32
(x6)
FIG-2: Ground Radial Ring Assembly

Step-3: Assemble the capacitive-hat support ring.
2 194174 8-hole radial ring
2 196242 Upper radial-ring support bracket (do not confuse with set of 3 guy brackets)
8 010009 5/8” x 8-32 screw
2 360941 #10 aluminum spacer washer
8 011941 #8 lock washer
8 010011 8-32 nut
[ ] Locate the two radial rings and place together so cupped grooves oppose.
[ ] Install two 5/8” screws from top, as shown.
[ ] From bottom side, install a #10 spacer washer and a support bracket on each screw.
[ ] Secure assembly using lock washers and nuts (finger-tighten only for now).
[ ] Install six 5/8” screws in remaining holes, securing with lock washers and nuts.
[ ] Set assembly aside for later installation on resonator assembly.
#10 aluminum
washer (x2)
radial ring (x2)
5/8" x 8-32 (x2)
lockwasher (x2)
nut (x2)
support bracket (x2)
5/8" x 8-32 (x6)
lockwasher (x6)
nut (x6)
Note: cups oppossing
FIG-3: Assembly Detail, Capacitive Hat
Step-4: Install the 160-meter loading coil on the insulated resonator tube.
1 126854 Fiberglass resonator support tube
1 MA160VCA1 160-meter loading coil
2 105630 Loading coil standoff spacer
2 010120 2” x 8-32 screw
4 010011 8-32 nut
[ ] On the insulator tube, identify the two coil-mounting hole locations (middle holes at A, B).
[ ] Install a 2” screw in each coil-mount hole and secure with a nut.
[ ] Install a spacer on each of the two mounting studs.
[ ] Find the loading coil and identify end with self-tapping screw securing the last turn (bottom of coil).
[ ] Orienting as shown at C, slide coil over tube and drop onto mounting studs. Secure with nuts.
AB
40-meter coil
Insulator Tube
spacer 2" x 8-32 screw
location
nut
Drop 160-meter coil onto
mounting studs
lug
lug
screw
nut
C
Low end Top End
FIG-4: Mounting Loading Coil

Step-5: Complete assembly of the top resonator section.
1 ---------- Radial ring assembly (set aside from Step-3)
1 MA160VBI 1/2” OD x 35-7/8” resonator stub section (NS/2S)
1 MA160VBJ 3/8” OD x 35-7/8” resonator stub section (NS/2S)
1 MA160VBK 1/4” OD x 41” resonator stub section (solid rod)
1 055105 1/4” vinyl end cap
3 030407 Small worm clamp
1 010123 1-1/2” x 8-32 screw
1 010011 8-32 nut
1 902428 Braid strap
1 156336 1/2” ID Resonator-stub bushing
[ ] Insert 1/2” tube (BI) into the 1/2” ID bushing and align screw holes (detail A).
[ ] Install the bushing and tube inside fiberglass resonator tube. Align all screw holes (B).
[ ] Slide radial-ring assembly over outside of resonator tube, position with screw holes aligned (C).
[ ] Install 1-1/2” screw at Dand capture coil-lead lug at bottom. Secure with nut, tighten firmly.
[ ] Find braid strap and nip eye off one end, as shown at (E).
[ ] Using existing hardware on radial ring, attach braid strap at (F) and secure in place.
[ ] Install small worm clamp on 1/2” tube BI and use to secure nipped end of braid.
[ ] Install small worm clamp on top end of 1/2” tube BI, insert 3/8” tube BJ and secure (G).
[ ] Install small worm clamp on top end of 3/8” tube BJ, insert 1/4” rod BK and secure (H).
[ ] Slip 1/4” vinyl tip cap on end of 1/4” rod BK at ( I ). Stub sections will be set to length later on.
worm clamp
B
cut
braid strap prep
worm clamp vinyl cap
Cinsert BI and align holes
B
G
HI
E
F
A
D
align all
holes
1/2" ID insulated bushing
BI
160-M
coil
BI BJ BK
FIG-5: Stinger Assembly
Step-6: Assemble the antenna radiator (see FIG-6).
2 MA8040VBB Aluminum splice tube, 12” x 1-1/4” OD (NS/NS)
2 MA8040VBC Aluminum radiator section-2, 72” x 1-3/8” OD (4S/4S)
1 MA8040VBD Aluminum radiator section-3, 72” x 1-1/4” OD (NS/4S)
1 MA8040VBE Aluminum radiator section-4, 72” x 1-1/8” OD (NS/2SH)
5 030412 Large Worm clamp
[ ] Find one 1-3/8”-OD radiator section BC and two 1-1/4”-OD splice tubes BB.
[ ] Measure off 6” on both splice tubes BB and mark (locates center).
[ ] On the 1-3/8” tube BC, insert a splice tube (BB} 6” inside each end and secure with worm clamps.
[ ] Find the second 1-3/8”-OD radiator section BC. Splice to first section BC and secure with a worm clamp.
[ ] Find the 1-1/4”-OD radiator section BD. Locate the un-slotted end, measure off 5-3/4” and mark.
[ ] Insert BD 5-3/4” into the free end of BC and secure in place with a worm clamp.
[ ] Find the 1-1/8” radiator section BE. Locate the un-slotted end, measure off 5-3/4” and mark.
[ ] Insert BE 5-3/4” into BD and secure with a worm clamp.
[ ] Adjust telescoped tubes BC/BD and BD/BE, as needed, to obtain a total length of 23’ 6” (see FIG-6).
6' x 1-3/8" 6' x 1-3/8" 6' x 1-1/4"
(insert 6")
23' 6"
12" splice tubes
(insert 6")
BB BC BC BD 6' x 1-1/8"BE
BB
(insert 6")
FIG-6: Radiator Assembly Diagram

Step-7: Install the antenna guy supports.
1 030412 Large worm clamp
3 193631 Guy bracket
3 094259 Guy rope thimble
1 MA160VGW Guy line, coil 100’ coil of Danscord-30D
[ ] Find a large worm clamp and install loosely on tube BD 3” below the junction with tube BE.
[ ] Find the three (3) guy brackets and slide them under the worm clamp band as shown (FIG-7A).
[ ] Position brackets around BD for equal spacing (120-degrees apart).
[ ] Tighten worm clamp to secure guy brackets firmly in position.
BD BE
Place worm clamp loosely around Slide 3 guy brackets under clamp,
tube 3" below BD/BE junction.
Tighten
clamp
position 120-degrees apart
120-degrees
3"
around tube.
FIG-7A: Installation of Guy Brackets
[ ] Find three (3) guy-line thimbles. Using a large flat-blade screwdriver, pry open ends (FIG-7B).
[ ] Install a thimble on each of the three guy brackets. Re-close end to secure in place.
[ ] Find the 100-foot coil of Danscord guy line. Uncoil and cut into three equal lengths (33’ 4” each).
[ ] Thread a line around each of the three thimbles, tying off as shown (use half hitches or a sailor’s knot).
[ ] Heat free end of each line with a match or small torch to prevent unraveling (do not touch until cool).
[ ] Pull-test each line to ensure knot is secure.
Compress thimble
back to shape.
Pry guy thimbles open. Install a thimble on each bracket.
Thread line over thimble
and tie securely.
end of line.
Heat free
FIG-7B: Installing Thimbles and Guys
Step-8: Install capacitive hat rods on resonator assembly.
8 221186 Radial-rod, 0.1” x 48”
8 056249 Vinyl end cap
[ ] Install a vinyl end cap on one end of each rod. Lubricate with soap--as needed--to insert.
[ ] Loosen radial-ring hardware and install eight (8) rods, as shown (FIG-8).
[ ] Tighten all hardware.
Insert rods
to inside rim
of ring
Install a tip on each rod
FIG-8: Radial Rod Installation

Step-9: Construct a base support.
When selecting a site, allow sufficient area to spread out radials and install guys. Confirm that, if toppled by
accident, the antenna can fall in any direction without striking power wires. Also, ensure the top of the
resonator will clear overhead branches when fully extended. The MA160V requires a stable ground support
which must be constructed prior to raising the antenna. Any suitable post-style mount will work, but the
antenna’s aluminum base is especially designed to slip inside readily available 1-1/2” OD thin-wall steel
galvanized conduit. This pipe can be purchased at most hardware stores. Drive into the ground for
temporary set-ups, or set into a posthole and capture in concrete for a permanent installation (FIG-9A, 9B).
1-1/2" ID
thin-wall
steel
conduit
4 ft
captured in
concrete
4-5 ft
minimum
cut pipe here
When installation
is complete,
Driven
Mount
Posthole
Mount
FIG-9A: Recommended Ground Supports
Important Note: Ensure inside of the conduit is free from concrete and other debris at least 10”
below the top rim so the antenna base tube can seat full-length inside.
Notch support pipe
to prevent antenna
from rotating in base
Use standard TV
style tube-to-tube
splicing U-bolts
FIG-9B: Mounting Methods
Step-10: Install resonator section on vertical radiator and pre-tune.
1 010123 1-1/2” x 8-32 screw
1 010011 8-32 nut
[ ] Slip fiberglass resonator tube inside the top of 1-1/8” radiator tube BE (FIG-10).
[ ] Align the screw holes as shown.
[ ] Using a 1-1/2” screw and 8-32 nut, secure resonator tube and coil wire in place. Tighten securely.
1-1/8" tube
1-1/2" x 8-32
(BE)
FIG-10: Resonator Installation Detail
[ ] Loosen top-section worm clamps, set stinger length to desired band segment (ballpark adjustment):
1.825 MHz = full extension 1.85 MHz = 88” 1.90 MHz = 72” 1.95 MHz = 56” 2.00 MHz = 42”

STEP-11: Install three guy-anchor stakes.
3 195179 Guy anchor stakes
[ ] Using a compass and measuring tape, lay out three 15-foot guy-line paths spaced 120-degrees apart.
[ ] At the far end of each path, drive a guy-line anchor stake--angling it away from the antenna as shown.
Drive anchor stake in
ground at angle
Antenna Base
15 feet 15 feet
15 feet
Base
Anchor
A
ncho
r
Anchor
MA160V
FIG-11: Guy-line Anchor Stake Installation
Step 12: Install antenna on base section.
1 030412 Large Worm clamp
[ ] Slip large worm clamp on radiator section BAT, securing temporarily below compression slots (FIG-12A).
[ ] Untangle guy lines and spread out so they will drop freely to the ground when the antenna is raised.
[ ] Raise vertical radiator with the bottom end BB butted into the ground next to the base.
[ ] Steady the radiator in position next to the base until vertical and stable.
[ ] Lift the radiator vertically and insert protruding splice BB tube into base section BAT (2-person job).
[ ] Loosen and slide the worm clamp up into position over slots of BAT and tighten in place.
[ ] Walk each guy line out to its anchor and tie in place as shown in FIG-12B.
Important Warning: Never attempt to raise the MA160V without assistance. The un-guyed radiator is
top-heavy and may become difficult to control without an extra pair of hands.
Slide large
clamp on tube
Secure
Clamp
BAT BAT
BC
BB
BAT
BC
BB
Raise
Antenna Lift and
Insert
FIG-12A: Installing Antenna Radiator
Loop guy under
retainer rod and apply light
tension to straigten radiator
Tie securely in place
FIG-12B: Tying Off Guys to Anchor Stakes

Step-13: Connect feedline to antenna base.
2 100449 Solder lug
Prepare coax, as shown in FIG-13. Attach center conductor to main radiator and shield to ground radial ring
using solder lugs. For best weather protection, flood braid with a weather-resistant liquid sealant such as
Liquid Tape™. This will prevent water from entering the coax and wicking along the shield. Coil several turns
of coax next to the antenna base or install a choke-style current balun at the feed point (see Appendix-1 for
instructions). Feedline leading to station may be buried between radials.
Center Conductor
Shield
Coax Connection
1-3/4"
Cable Pigtail
FIG-13: Feedline Connection
Step-14: Install ground radials
Basic System: This set-up works especially well for installing the MA160V within the confines of a typical
residential house lot (FIG-14A). You’ll begin by installing 3 primary radials, then continue to add more—as
needed—until achieving a feed resistance of approximately 50 Ohms (or minimum SWR). Radials need not
be of equal length and may be arranged to fit the shape of your yard. The total number of wires needed
depends on local soil conductivity and the cut lengths used. Where possible, bury each wire 2-4 inches
below the surface to prevent breakage and to avoid creating a trip hazard for others. A turf cutter or edger
may be used to open a narrow slit in the ground. Radials may be routed around trees, buildings and other
landscaping features as needed. A symmetrical layout is best, but not essential. For best results, follow the
installation procedure below:
[ ] Cut a set of three primary radials to fit available space (20-50 feet long).
[ ] Scrape off enamel and install a #8 lug on one end of each wire. Solder in place.
[ ] Install the primary radial wires approximately 120-degrees apart and connect each to the radial ring.
[ ] Connect a SWR analyzer to the coax feed and tune the frequency control to find minimum SWR.
[ ] Prepare and add more radials (15-40 feet long), one at a time, while continuing to monitor SWR.
[ ] Stop adding radials when SWR approximates 1:1.
[ ] Retune the antenna’s stinger section for best SWR on your frequency of choice.
Notes: Remember to retune the frequency control of the analyzer after adding each radial—the SWR dip
should migrate down slightly in frequency as each new radial is added. Once the lowest SWR reading
possible has been obtained, continuing to install radials will cause SWR to rise again as the feed resistance
decreases below 50 Ohms. It may be possible to trim or add one or more short radial, as needed, to obtain
flat 1:1 SWR. The lower the minimum SWR reading, the wider the usable bandwidth will be. Once the radial
field is set in place, note that SWR may fluctuate slightly over time with changes in soil moisture, but you
should be able to achieve low SWR in all parts of the band by changing only the resonator stinger setting.
The MA-160V should also perform well over the radial system prescribed for the MA8040V.
added
radials as
needed
for lowest
SWR
Install
Primary Radials
Added Radials
FIG-14A: Example of Basic Residential Radial Installation

2. Enhanced System: You may also install the MA160V over a more robust radial system (FIG-14B).
Benefits include a somewhat lower take-off angle plus higher radiating efficiency because of reduced ground
losses. In order to implement a larger system, you’ll need more open space plus significantly more radial
wire than the 400 feet provided with the antenna. You’ll also need to install some type of matching network
to compensate for the system’s lower feedpoint resistance. The ARRL Antenna Book and many other
publications offer detailed instructions describing radial field construction and vertical antenna matching
techniques. Extra radial wire may come from any surplus source as long as it is jacketed or enameled and
strong enough to avoid breakage. Several matching options are possible including a shunt inductor, fixed-
ratio Ununn, transmission line transformer, or adjustable L-network. The best matching technique will
depend on factors like the transformation ratio needed and the amount of power you intend to run.
Generally, for a loaded antenna like the MA160V, a dense ground system with a large number of shorter
wires will perform better than a full-sized ¼-wave system with fewer radials. The layout described below
should work well. For best results, install as described:
[ ] Cut 16 primary radials of 50 to 60 feet in length.
[ ] Scrape or remove insulation at one end and install a #8 solder lug on each.
[ ] Lay these radials out in a symmetrical pattern around the base and connect each to the radial ring.
[ ] Check the feedpoint resistance with a handheld analyzer using the “vector impedance” function*.
[ ] Continue adding radials, filling in between the primary set, while periodically checking resistance.
[ ] If using a fixed-ratio matching transformer, add radials until you reach a convenient transformation value.
[ ] If using an adjustable network, add radials until you reach the point of diminishing returns (64 max).
* See notes below
Use
16 - 64
radials
of 50 to 60
feet each.
FIG-14B: Example of High-Efficiency Radial System
Notes: When monitoring feedpoint resistance, disconnect the station feedline and connect the analyzer
directly to the antenna terminals through a short pigtail (making these measurements through a long feed
will transform readings to erroneous values). Also, note that shunt-coil matching systems will introduce
inductive reactance that lowers the system’s resonant operating frequency. Readjustment of the stinger will
be needed to compensate for this downward frequency shift.
Housekeeping: When the radial installation is complete, inspect the base area for looped or hanging wires
that may pull loose or become broken at a later time. Trim or bury any excess (see FIG-14C). Also, confirm
that all radial ring screws are fully tightened.
FIG-14C: Dress Radial Leads, Check Hardware
Resonator Tuning: The telescoping stinger above the capacitive hat was designed to provide tuning over
the full 160 Meter band. However, tuning range may be impacted by external factors such as soil
conductivity, radial field irregularities, and proximity to other antennas or metallic objects. In the event you
experience difficulty tuning to the bottom of the band, attach a thin wire between the tips of two or three
capacitive hat rods to extend tuning range. Conversely, you may remove a hat rod to extend coverage at the
high end of the band.

48 Perimeter Road
Manchester, NH 03103
603-627-7877
FAX [phone]
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
MA160V Specifications:
Frequency Coverage: 1.8 – 2.0 MHz
Impedance: 50-Ohms
SWR: 1.1:1 typical at resonance
Bandwidth (2:1 SWR) 40 kHz
Height: 30-36 feet—height adjustable
Weight: 12 lbs (5.44 kG)
Gain: 0 dBi over ideal ground, -6 dBi minimal radials, average ground
Ground Radials: See installation instructions
LIMITED WARRANTY
CUSHCRAFT CORPORATION, P.O. BOX 4680, MANCHESTER, NEW HAMPSHIRE
03108, WARRANTS TO THE ORIGINAL CONSUMER PURCHASER FOR TWO YEARS
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.
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
W A R R A N T Y A N D L I A B I L I T Y
C u s h c r a ft C o r p o ra t io n s h a l l n o t b e li a b le fo r a n y in c id e n t a l o r
con s equ e ntial da m ag es w h ich m ay re s ult from a defect, or use , im p rop er
or o th erw is e or in s ta llatio n, im p ro pe r or o th erw is e.
P le a s e co n tac t yo u r ve n d or fo r te ch nica l su p p ort an d w a rra nty se rv ic e .
Appendix 1: How to make a Current-Choke Balun using a Toroid Form:
A current-choke style balun may be used to prevent the antenna’s feedline from interacting with the antenna
and radial system. Best SWR performance was obtained by installing a choke such as the one shown here
at the antenna base.
Feedline Choke
RG-58 for low power or
RG-303 for high power
5977003801
FT240-73
Amidon Associates
Fair-RIte
2.4" OD Toroid Core
12 - 14 Turns coax on
Use
or