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Is there any project, any commercial antenna of such length, that allow me to work all band 7 - 14 - 21 - 28 MHz ? =========================== All dipoles of any reasonable length, inverted-V or not, commercial or home brew, are quite efficient on all HF bands in that they all radiate most of the power which is put into them. The problems lie in loss in the transmission line and the essential tuner. Erect the highest and longest dipole you can, feed it with open-wire line, use a tuner appropriate for each band of interest and you won't be disappointed. Or better still, if you can manage it, erect the longest inverted-L you can and feed it at one end tuned against a modest ground system such as a dozen bent surface or shallow-buried radials. ---- Reg, G4FGQ |
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