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An 80-10 end-fed half-wave antenna can be a very good performing part of an HF station. But its performance depends heavily on a well-designed and carefully constructed 49:1 unun, which matches the long wire impedance to within tuning range of operation. But the perfor-mance of an end-fed antenna is also very dependent on height above ground ...
The 80-10-JR-KW consists of the two components shown in Figure 1 – the antenna wire and an impedance transformer. Designed to be used on 80, 40, 20, 15, and 10 meters, the EFHW antenna wire is approximately one half-wavelength long on 40 meters with a coil and extension that add 80 meter operation.
MANUAL: ENDFEDZ ALLBAND-KW 80-10 EFHW 1KW ICAS ANTENNA The EFHW (End-Fed Half-Wave) antenna is one of amateur radio’s oldest antenna designs. Originally known as the “end-fed Zepp,” it was used by airships (known as “Zeppelins”) suspended from the fed end with the free end hanging loose.
Utah Valley amateur Radio Club's Half Wave End Fed Antenna Detailed Build Instructions for the 80-10 end-fed half-wave antenna with 49:1 unun: Noji-Article-80-10-EF-HW.pdf
Antenna for 80 – 10 Meters Bottom Line The EFHW-8010-1K provides an easy-to-deploy antenna that can be operated on all HF bands, except 60 meters, with a low enough SWR to be used without an antenna tuner on most bands. Being able to feed the antenna from an end may make it a good solution for many support configurations. Figure 2 — The
Installation Tips. Weather you bought one of our multiband models like the EFHW-8010/7510, EFHW-4010 or a transformer like the MEF-330, MEF-107 etc. these basic rules apply to any antenna installation. All antennas need to be as far as possible from ground, antennas, wires, homes and similar.
EFHW-8010-1K EFHW ANTENNA The perfect antenna for DXing, EMCOM, ALE HF-link sta-tions, NVIS, MARS, ARES, RACES … Various installations such as horizontal, vertical, an inverted V, as well as inverted L, zigzag etc. are possible. Measured VSWRs are taken with the antenna in an in-verted V shape with the center of
