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Richard Fry wrote:
The fact that adding a coil to an 11-degree radiator produced the system reactance a 90-degree, unloaded, linear radiator does not mean that the coil and its junction to the stinger have supplied the "missing electrical degrees" to the antenna system. The RADIATOR is still only 11 degrees long, and will have same radiation resistance and relative field pattern, regardless of the coil. The coil only supplied a non-reactive condition at the system feedpoint. I don't know how many times I've said this discussion about current distribution in a loading coil doesn't have anything at all to do with the radiation pattern. The effort spent here in bitter argument about phase shift through a coil, and missing degrees would be better spent on methods of improving the radiation resistance of such systems, and reducing the matching and r-f ground losses that limit their performance. That may well be true. Please feel to start a thread with that subject matter. -- 73, Cecil http://www.w5dxp.com |
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