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![]() "Jeff" napisal w wiadomosci ... And what about your equipment? Is the earth connection disconnected? S* I have no earth connection, so it cannot be connected or disconnected. Why than: "The ideal ground system forAM broadcasters comprises at least 120 buried copper or phosphor bronze radial wires at least one-quarter wavelength long and a ground-screen in the immediate vicinity of the tower. All the ground system components are bonded together, usually by welding, brazing or using coin silversolder to help reduce corrosion". From: http://en.wikipedia.org/wiki/Monopole_antenna Tell them that they are WRONG. S* They are not wrong a such; your quote is about "AM broadcasters", which is normally (and incorrectly) meant to mean 'long & medium Wave' broadcasters. Because for the long wavelengths involved many such broadcasters choose to use vertical monopoles for antennas, and for those monopoles to work efficiently they do indeed require a good ground system. (These were the systems that Marconi was referring to). If there is sufficient space a dipole could be used which would *NOT* require the ground system. That in Warsaw required the ground system: ""Large constructed half-wavelength dipole towers include the Warsaw radio mast - the only half-wave dipole for longwave ever built." S* |
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