Box with adaptation system intended for the manufacture of monoband antennas EFHW (End-Fed Half Wave) 24, 27 or 28 MHz. Just add a length of wire equivalent to 1/2 wave of the chosen frequency to be easily operational in portable mode!
27 MHz 1/4 wave vertical antenna delivered with 3 wire radians. Very robust tubes with large diameters and thicknesses (2 mm), wide bandwidth, very low SWR. Connection to the 50 ohm coaxial cable directly by SO-239 (no balun or other adaptation system). On perfect ground the gain reaches 5.15 dBi and the radiation lobes favor DX.
Dipole 1/2 wave 7 MHz, length : 20 m. Robust aluminum balun with SO-239 connector (female PL) and insulators at the ends.
Dipole 1/2 wave 7 MHz length : 20 m. Robust 60 mm diameter aluminum balun with SO-239 connector (female PL) and insulators at the ends + CHOKE BALUN integrated.
Dipole 1/2 wave 7 MHz shortened, length: 13 m. Robust aluminum balun with SO-239 connector and insulators at the ends + CHOKE BALUN integrated.
Dipole 1/2 wave 7 MHz shortened, length: 13 m. Robust aluminum balun with SO-239 connector and insulators at the ends.
Double dipole 1/2 wave 7 and 14 MHz, lengths : 20 + 10 m (4 wires). Robust aluminum balun with SO-239 (PL) connector and insulators at the ends.
Double dipole 1/2 wave 7 and 14 MHz, lengths : 20 + 10 m (4 wires). Robust aluminum balun with SO-239 connector and insulators at the ends + CHOKE BALUN integrated.
Double dipole 1/2 wave 3.5 and 7 MHz, lengths : 40 + 20 m (4 wires). Robust aluminum balun with SO-239 connector and insulators at the ends.