Build Your Own FM Antenna___________________________ | |
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Antennas and Theory in General | |
The (old) Cebik site had some great information: one, two, and three. http://sumtechantenna.freeservers.com/ is a great Australian site. The ZL105 antenna is the FM version. However, this particular antenna is centered at about 105 mhz. For the US, the author of the site said to multiply all the dimensions by 105/98, or 1.07, to center it at 98 mhz. He said rolloff is different at high and low ends, so the center point can be adjusted easily with the math. His other antennas also require some conversion to work with the US bands. Brian Beezley's site is another excellent read. He models quite a few antennas for gain and reception characteristics, including the APS-13. Another great site, much information about TV and FM antennas from KYES in Alaska. More
useful, basic information. Covers HDTV primarily, but it applies to FM
reception as well. |
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Materials | |
Texas Towers: 6061-T6 aluminum tubing. Best prices I found, though they don't have 0.25" round stock. AirParts, Inc.: Aluminum tubing DX Engineering: Some connectors, clamps, baluns, cables, etc. Ken Wetzel's low-loss balun construction. |
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25mar12
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