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#1
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Jim Kelley wrote:
The antenna is still just as likely to produce precipitation static noise however. It is unlikely that dissimilar antennas will produce identical responses to anything including static. -- 73, Cecil http://www.w5dxp.com |
#2
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Cecil Moore wrote:
Jim Kelley wrote: The antenna is still just as likely to produce precipitation static noise however. It is unlikely that dissimilar antennas will produce identical responses to anything including static. Sorry if I gave that impression. I simply meant that a folded dipole is just as likely to produce precipitation static noise as a dipole antenna. Merry Christmas de AC6XG |
#3
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Jim Kelley wrote:
I simply meant that a folded dipole is just as likely to produce precipitation static noise as a dipole antenna. Probably not true for a bare-wire dipole Vs a ladder-line folded dipole. Insulation is one well accepted method of reducing precipitation static on airplane antennas. In any case, the two wires in the folded dipole make it different from the single wire in the dipole. I'm away from my computer for the moment but consider your capacitor suggestion. Let's say we have a perfect ground plane and are testing a dipole Vs a folded dipole. They are in inverted-V configurations so we can discharge a capacitor between the end of the antenna and ground. For the dipole, there is only one path to ground through the receiver. For the folded dipole, there are two paths to ground, one through the receiver and one to ground. Why won't the charge applied to the folded dipole divide and take both paths? -- 73, Cecil, w5dxp.com |
#4
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![]() Cecil Moore wrote: Jim Kelley wrote: I simply meant that a folded dipole is just as likely to produce precipitation static noise as a dipole antenna. Probably not true for a bare-wire dipole Vs a ladder-line folded dipole. Insulation is one well accepted method of reducing precipitation static on airplane antennas. In any case, the two wires in the folded dipole make it different from the single wire in the dipole. Any antenna/receiver combination is likely to be sensitive to p-static. Some more than others obviously. An indoor, heavily insulated folded dipole connected to an differential input receiver would probably not receive much - so I'll give you that one even though I never claimed it would. Happier now? I'm away from my computer for the moment but consider your capacitor suggestion. Let's say we have a perfect ground plane and are testing a dipole Vs a folded dipole. They are in inverted-V configurations so we can discharge a capacitor between the end of the antenna and ground. For the dipole, there is only one path to ground through the receiver. For the folded dipole, there are two paths to ground, one through the receiver and one to ground. Why won't the charge applied to the folded dipole divide and take both paths? -- 73, Cecil, w5dxp.com You seem like a guy who'd pick a fight with his own shadow sometimes, Cecil. 73, ac6xg |
#5
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Jim Kelley wrote:
Jim Kelley wrote: I simply meant that a folded dipole is just as likely to produce precipitation static noise as a dipole antenna. ... so I'll give you that one even though I never claimed it would. Happier now? Sorry, I thought you were claiming equal magnitudes of noise for two dissimilar antennas. You seem like a guy who'd pick a fight with his own shadow sometimes, Sorry, I seem to have inferred something you didn't mean to imply. I believe I can prove the difference in the two antennas using EZNEC but not until I get back to my home computer. -- 73, Cecil, w5dxp.com |
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