By Joseph J. Carr
The textual content makes point out of a complement CD-ROM containing instruments that are utilized in calculating antenna parameters. This CD-ROM used to be no longer disbursed with the digital model of the textual content and isn't incorporated here.
Joe Carr has supplied radio amateurs and short-wave listeners with the definitive layout consultant for sending and receiving radio signs with Antenna Toolkit 2d edition.
the hot version has been revised to incorporate extra situations of propagation, extra antennas and in addition new chapters - Small Loop Antennas (a subject of substantial curiosity, which has been the topic of a lot fresh debate within the novice radio press); and Yagi Beam Antennas (widely used at HF and VHF).
Joe Carr's services within the quarter of antenna layout is known. Antenna designers, even if hobbyist or technician, will be guaranteed they want glance no extra than Antenna Toolkit for the full advisor to knowing the practicalities of utilizing and designing antennas this present day.
A whole resolution for antenna layout in a single package.
The definitive consultant to antenna layout for radio amateurs and short-wave listeners.
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Additional resources for Antenna Toolkit (2nd Edition)
It looks like ordinary copper wire on the outside. The steel provides strength and thereby increases the reliability of the antenna installation. But steel is not a terribly good electrical conductor, so the manufacturer places a layer of copper over the outside of the wire. The standard wire sold with the better antenna kits and by the better sources is copper-clad steel, stranded wire of AWG 14 (SWG 16) size. Each strand is copper-clad steel, and the strands are wound together to form the antenna wire.
There was not enough strength to support a 12 m lever arm, whipping around in a 35 knot wind. 5–12 m lever arm. A shabby installation will tear apart in wind, causing the antenna to be damaged, damage to the house, and destruction of the installation. That is why I recommend ‘brick outhouse’ construction methods. Over the 33 years I have been in amateur radio, I have seen a lot of verticals toppled over. Except for a few shabby models that were so poorly built that they should not have been on the market in the ﬁrst place, all of these failed installations were caused by either poor installation design or poor-quality materials.
Note that the lobes are elevated, rather than being exactly on the horizon. The angle of these lobes is the angle of radiation, and affects the distance that an antenna will transmit to or receive from. A low angle of radiation is usually prescribed for long-distance ‘DX,’ while a high angle of radiation produces skip to nearer regions. 18 shows the conventions for specifying antenna patterns. The antenna is a dipole, with both relative electric ﬁeld strength and relative powers plotted (both types of plot are done).