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Query: shorty 40
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Short dipole antenna for 40 meter ham band. Can be put up in the space required for a 20 meter dipole. -
A shortened dipole for 40 meters band by Martin E. Meserve -
How to Design and Build a Field Expedient End-Fed Half-Wave Antenna for 20m, 40m and 80m. This Shorty 80m EFHW comprises a 49:1 autotransformer (to match the very high impedance at the end of a half-wave wire), a half-wavelength wire for 40m (also a quarter-wavelength for 80m), a loading coil and a short tail wire. The coil and the short tail wire (about 6 feet) make up the other quarter wave on 80m.