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Interesting 144 foot Dipole
In article ,
Cecil Moore wrote: A ham over on eHam.net wanted to know if a 40m EDZ would work on 80m. Of course it will if fed correctly since it is about 166 feet long. The question is: Is there a fixed length of ladder-line that will work both on 40m and 80m? I fired up EZNEC and started cut and trying. I found that a 144 foot 40m "EDZ" would yield some interesting results. I went out and extended my 130 foot dipole to 144 feet and was impressed. I found that a 144 foot center-fed dipole fed with ~88 feet of 450 ohm ladder-line was resonant on 7.150 MHz and my IC-756PRO would tune it over the entire 40m band. 40m is my favorite band. In addition, the IC-756PRO tuner will tune the same antenna system over a 3.7-3.9 MHz range on 80m. In addition, the IC-756PRO tuner will tune the same antenna system on 30m and 17m. I've already got a rotatable dipole for 20m-10m and this antenna tunes on 80m, 40m, and 30m. interesting , resonant too hmm wonder how the waves look on that dipole? |
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