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On May 31, 11:07*am, Wond wrote:
* * *I sort of think also, the Lazy H (think colinear?) should be fed and phased with 75 ohm line. On Mon, 30 May 2011 14:48:45 -0700, walt wrote: If you feed at the center of the line connecting the two radiating elements the phasing will be correct regardless of the velocity factor, because the length from the center feed point on the connecting line will be the same from that point to each radiating element. With this configuration of feeding don't put a twist in the connecting line--the two radiating elements MUST be fed IN PHASE! If they're fed out of phase the array will look like an Adcock direction- finding antenna, with a deep null in the radiation pattern in the broadside direction. Just my thoughts, Walt, W2DU Another point to consider, Mark, is that the azimuth beam width is narrower with the lazy-H than that of the dipole. So perhaps the apparent lower signal level is in directions off the side of the radiation pattern, where one would expect the signal level to be lower than that of the dipole at the same angle. Walt |
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