Assembly and Installation Instructions
Cushcraft MA8040V Dual-Band Vertical Antenna
80 – 40 Meter Vertical Monopole Antenna
956358
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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 with a choke similar to the one shown here
installed at the antenna base.
MA8040V Specifications:
Frequency Coverage:
3.5-4.0 MHz, 7.0–7.3 MHz
Impedance:
50-Ohms
SWR:
1.1:1 typical at resonance
Bandwidth (2:1 SWR)
100 kHz on 80/75 meters, 300 kHz on 40 meters
Height:
23-27 feet (adjustable for 3.5 – 4.0 MHz coverage)
Weight:
9.0 LB (4.1 kg.)
Typical Gain:
0 dBi @ 3.5 MHz, 2 dBi @ 7 MHz
Ground Radials:
Eight recommended (4 x 65’, 4 x 35’)
Limited Warranty:
Cushcraft Corporation, 48 Perimeter Road, Manchester, New Hampshire 03103, 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 antennas 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, and 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 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 factory will nullify this warranty.
48 Perimeter Road
Manchester, NH 03103
603-627-7877
FAX 603-627-1764
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
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
