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#1
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Jim Kelley wrote:
And still, rotating the antenna has nothing to do with summing the signals - coherently, or otherwise. Agreed? Are we talking normal operation or receiving big bang background radiation? -- 73, Cecil http://www.qsl.net/w5dxp |
#2
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![]() Cecil Moore wrote: Jim Kelley wrote: And still, rotating the antenna has nothing to do with summing the signals - coherently, or otherwise. Agreed? Are we talking normal operation or receiving big bang background radiation? The source of radiation was not described; only its distribution. It was like being surrounded isotropically by radio sources - not unlike the 3 K background. But there are other sources which pretty well surround us as well. ac6xg |
#3
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Jim Kelley wrote:
Cecil Moore wrote: Are we talking normal operation or receiving big bang background radiation? The source of radiation was not described; only its distribution. It was like being surrounded isotropically by radio sources - not unlike the 3 K background. But there are other sources which pretty well surround us as well. OK, sometimes I lose the context. If the radiation is arriving isotopically, it doesn't matter which direction the Yagi is pointed (as I inferred from what you said). But arriving isotropic radiation would all converge at a point. If a plumber's delight Yagi driven element is centered on that point, it would receive all the radiation in a default-isotropic mode. -- 73, Cecil http://www.qsl.net/w5dxp |
#4
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Cecil Moore wrote:
Jim Kelley wrote: Cecil Moore wrote: Are we talking normal operation or receiving big bang background radiation? The source of radiation was not described; only its distribution. It was like being surrounded isotropically by radio sources - not unlike the 3 K background. But there are other sources which pretty well surround us as well. OK, sometimes I lose the context. If the radiation is arriving isotopically, it doesn't matter which direction the Yagi is pointed (as I inferred from what you said). But arriving isotropic radiation would all converge at a point. If a plumber's delight Yagi driven element is centered on that point, it would receive all the radiation in a default-isotropic mode. I think Roy pretty well nailed the answer. An interesting result - both antennas producing equal signals. I'd like to check that by comparing a dipole to an isotropic in such a field. I assume the results would be the same. Again, an interesting result. But you both bring some interesting points. ac6xg |
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