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Antennas And Lightning Induced Voltage Transients
Hello:
We get a lot of lightning strikes around here, and was wondering about this: Presently have a receive-only random length wire running around the inside of my attic. Guess I'm not really too worried about "direct" lightning strikes; if there is one I imagine I have a lot more to worry about than the radio. But, does the roof provide any protection from nearby lightning strikes inducing a high transient voltage into the indoor attic antenna wire, as compared to if I had the wire antenna strung outside the house ? Again, from an induced voltage standpoint concern. Or, is the fact that it is indoors really meaningless ? Thanks, Bob |
#2
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Antennas And Lightning Induced Voltage Transients
MEANINGLESS !!
Robert11 wrote: Hello: We get a lot of lightning strikes around here, and was wondering about this: Presently have a receive-only random length wire running around the inside of my attic. Guess I'm not really too worried about "direct" lightning strikes; if there is one I imagine I have a lot more to worry about than the radio. But, does the roof provide any protection from nearby lightning strikes inducing a high transient voltage into the indoor attic antenna wire, as compared to if I had the wire antenna strung outside the house ? Again, from an induced voltage standpoint concern. Or, is the fact that it is indoors really meaningless ? Thanks, Bob |
#3
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Antennas And Lightning Induced Voltage Transients
"Robert11" wrote in message news Hello: We get a lot of lightning strikes around here, and was wondering about this: Presently have a receive-only random length wire running around the inside of my attic.... But, does the roof provide any protection ... Or, is the fact that it is indoors really meaningless ? Thanks, Bob The roof has absolutely no significant magnetic properties, right? SO... the high current of the lightning is the "primary" of a transformer. The wire in your attic is the "secondary" of a transformer. A pretty poor transformer, but with that current, it'll induce lots'a voltage in your wire...roof or no roof. Right? 73, Steve, K,9.D;C'I |
#4
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Antennas And Lightning Induced Voltage Transients
The roof protects the antenna from lightning, even the sneaky stuff.
All you have to worry about is lightning striking the roof and yourself if you are not under it. ---- Reg. |
#5
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Antennas And Lightning Induced Voltage Transients
Robert11 wrote:
Hello: We get a lot of lightning strikes around here, and was wondering about this: Presently have a receive-only random length wire running around the inside of my attic. Guess I'm not really too worried about "direct" lightning strikes; if there is one I imagine I have a lot more to worry about than the radio. But, does the roof provide any protection from nearby lightning strikes inducing a high transient voltage into the indoor attic antenna wire, as compared to if I had the wire antenna strung outside the house ? Again, from an induced voltage standpoint concern. Or, is the fact that it is indoors really meaningless ? Meaningless. A neon to ground is traditional for receiving antennas. Makes a good EMP indicator. vy 73 Andy |
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