Description:
Antennas: theory, techniques and construction.
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Sangean ATS-909 external antenna impedance??
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Does anyone know what the Sangean ATS-909's external antenna input impedance is? I searched for days for documentation on that radio and found plenty, mods, schematics, service manuals, reviews, but no straight word on the impedance of that input! (Not even in the service manual specs). The only reference I... more »
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Ultra-compact 2m antenna ?
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Dear all, For a quite specific application I'm looking for an antenna design with ideally the following characteristics, which are, I know, contradictory : - 2m band - TX (low power, less than 1W) & RX - ultra compact, ideally able to fit in a 12-15cm x 5 cm x 5cm volume - as omnidirectionnal as possible on the horizontal plane... more »
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TLW Program problem
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I am having problems trying to use the TLW program from the ARRL antenna Book. The version is 3.0. An unsuccessful Google search plus the fact that I have the problem on two machines leads me to believe it is something I have done or am doing wrong. I believe it was working OK on both machines earlier. Both machines are running up to... more »
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can you use this?-----free
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its a whip ant , about 14 inches from end to base . inner diameter at base end is 1/2 inch . there is a set screw . loading coil measures about 2 1/2 inches . if you can use it , just pay postage from 06705 . for a picture go to [link] page 8 ( it is shown next to a 12 inch ruler . )... more »
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FCC Rules
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Please pardon the slightly off-topic subject. I'm giving a class at my grandson's school next month and I'm going to include ham radio, with some of the kids presumably getting on the air. Of course, an unlicensed person can operate if a properly licensed control operator is present. Is there a source of more detailed information? I... more »
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Three Element Quad Reconstruction
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I have to following quad parts that I got from a fella for whom I took a tower down. Three spiders, twelve fiberglass poles, three small copper coils, and a massive boom to mast fitting. I am wondering if it might be worth rehabilitating the original antenna which is a tri band 20, 15, 10 meter three element quad of unknown manufacture. I... more »
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