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On Sat, 28 May 2005 06:49:15 -0500, "hasan schiers"
wrote: This is a source run for an inverted L antenna for 80m that is 43 feet vertical and 23 feet horizontal. What would be the simplest matching network to use to produce a flat match. My primary use would be 80m low angle work at 3.7 and 3.5 Mhz, but also want to be able to use it (with a tuner, of course) for a local net at 3.97 megs. First of all, changing the match doesn't make the antenna change from a "low angle" radiator to a radiator for local work. While a 1.7:1 vswr at resonance is usable, I would like to get my starting point as low as possible to maintain some sort of reasonable vswr at the band edges, for those times when I need to check into the net. By simple I mean no caps...they are not all that easy to find (in a hurry) any longer. I need power handling of 500w. My two thoughts are some sort of 1/4 wave transformer (although that's a lot of coax), or a simple toroidal transformer. You can use a 1/4 transformer of two parallel RG-59 to get a nearly perfect match at 3.7 MHz. But, you must realize that by doing this you actually *increase* the SWR at the band edges. Any reactive solution will do the same. If you have a tuner anyway, I fail to see why you want to do this. |
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