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Aluminum foil capacitance hat
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Hash: SHA1 Michael Coslo wrote: What is the antenna length? Now as for Al foil as an antenna construction material: It works electrically, but isn't very strong. Your cardboard tubes aren't terribly weatherproof either. You might be able to shellac them heavily. But still it isn't a very good choice. Making contact with the aluminum could be an issue. Tubular aluminum is used on antennas, but the connection is usually helped by corrosion inhibitors, and nuts/bolts with washers to help "dig in" to the AL. Your thin foil will deform at best, and more likely rip with that sort of treatment. The antenna is abt 34 ft (1/4 wave for 40 meters). The cardboard tubing was for weight - this ant. was to be a portable ant. and would be deployed only in good wx. "Treatment" - that's why I wrapped the tubes/foil in clear plastic wrapping tape. Barring me accidentally smashing them or some discombobulated squirrel "having at 'em" I'd expect them to last for abt a year or 2. Regards & 73s, -- MGFoster:::mgf00 at earthlink decimal-point net Oakland, CA (USA) KI6OFN -----BEGIN PGP SIGNATURE----- Version: PGP for Personal Privacy 5.0 Charset: noconv iQA/AwUBR7C744echKqOuFEgEQIWpgCfbHwps+8RAVBLgtYGf7uu/UywXPkAmwXI iL1XU4yOSzyPugTPgpEZKxYU =d9Cc -----END PGP SIGNATURE----- |
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