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#1
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"The current which flows on the outer surface of the shield is called common
mode current. In other words, it is the unbalanced current not returned within the coaxial cable. This leads to a very important question. If the current isn't returned in the cable, where does it go? The answer is, it radiates! In fact, the amount of radiation from the coax cable is directly proportional to the common-mode current on that cable." From: http://www.k0bg.com/common.html "In fact, the amount of radiation from the coax cable is directly proportional to the common-mode current on that cable." The currents consists of electrons. Does it means that the electrons jump off from the end of the radiator? In Faraday time no such meters but Faraday had know that electrons (nuclei) jump off from the end of the open circuit. Also L. Lorenz known that the light is the oscillatory flow of electrons. S* |
#2
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Szczepan Bialek wrote:
"The current which flows on the outer surface of the shield is called common mode current. In other words, it is the unbalanced current not returned within the coaxial cable. This leads to a very important question. If the current isn't returned in the cable, where does it go? The answer is, it radiates! In fact, the amount of radiation from the coax cable is directly proportional to the common-mode current on that cable." From: http://www.k0bg.com/common.html "In fact, the amount of radiation from the coax cable is directly proportional to the common-mode current on that cable." The currents consists of electrons. Does it means that the electrons jump off from the end of the radiator? No, it does not mean that. There are no jumping electrons involved in radiation and you are an ineducable idiot. In Faraday time no such meters but Faraday had know that electrons (nuclei) jump off from the end of the open circuit. No, Faraday did NOT know that as it doesn't happen that way and you are an ineducable idiot. Also L. Lorenz known that the light is the oscillatory flow of electrons. No, Lorenz did NOT know that as it doesn't happen that way and you are an ineducable idiot. |
#4
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"Boomer" wrote in message
... I looked at my antenna the other day while I was talking. I saw some jumping off. Szczepan has been right all along. Or maybe it was bird do do I saw falling. Anyway, something was coming down from my antenna. Michael Hello Michael. The do do has been extinct for centuries. Have I misunderstood your email? 73, Ian. |
#5
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On 7/10/2012 4:27 PM, Ian wrote:
"Boomer" wrote in message ... I looked at my antenna the other day while I was talking. I saw some jumping off. Szczepan has been right all along. Or maybe it was bird do do I saw falling. Anyway, something was coming down from my antenna. Michael Hello Michael. The do do has been extinct for centuries. Have I misunderstood your email? 73, Ian. There was a bird on my antenna wire. I think he may have crapped about the time I was looking. It was either that or a huge bunch of electrons all fell off at once. Michael |
#6
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"Boomer" wrote in message
news ![]() On 7/10/2012 4:27 PM, Ian wrote: "Boomer" wrote in message ... I looked at my antenna the other day while I was talking. I saw some jumping off. Szczepan has been right all along. Or maybe it was bird do do I saw falling. Anyway, something was coming down from my antenna. Michael Hello Michael. The do do has been extinct for centuries. Have I misunderstood your email? 73, Ian. There was a bird on my antenna wire. I think he may have crapped about the time I was looking. It was either that or a huge bunch of electrons all fell off at once. Michael I prefer to think of the do-do. Keeping birds off aerials could be a rewarding topic. I think the pigeons that perch on my HF beam nibble at the trap end caps. Not good news. 73 Ian. |
#7
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Boomer wrote:
I looked at my antenna the other day while I was talking. I saw some jumping off. Szczepan has been right all along. Or maybe it was bird do do I saw falling. Anyway, something was coming down from my antenna. Me too but I know what it is; the insulation from the cheap Home Depot house wire I used to make the antenna. The damn insulation is hard to strip off when it is new but falls off all by itself after a couple of years in the sun. |
#8
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#9
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![]() "Rob" napisa³ w wiadomo¶ci ... wrote: Boomer wrote: I looked at my antenna the other day while I was talking. I saw some jumping off. Szczepan has been right all along. Or maybe it was bird do do I saw falling. Anyway, something was coming down from my antenna. Me too but I know what it is; the insulation from the cheap Home Depot house wire I used to make the antenna. The damn insulation is hard to strip off when it is new but falls off all by itself after a couple of years in the sun. Maybe the insulation is falling off because of all the electrons that have tried to jump off the wire when you were transmitting, and became trapped inside the insulation? Your antennas are the diwire. From the radiating wire the electrons jump off and penetrate into the counterpoise wire. It would be interesting to know if is any difference in behavior of the different wires. S* |
#10
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On Tuesday, July 10, 2012 11:49:52 AM UTC-5, Szczepan Bialek wrote:
The currents consists of electrons. Sorry, electrons cannot move fast enough to support RF current which cannot flow inside a wire. The RF EM wave flow is supported by photons moving at the speed of light in a cloud surrounding the wire. Does it means that the electrons jump off from the end of the radiator? Electrons are known to "jump off from the end of the radiator". It's called corona and it is visible at night. Fortunately, it happens only under special conditions because that energy is not coherently radiated, i.e. not useful for anything except melting the ends of an antenna. In Faraday time no such meters but Faraday had know that electrons (nuclei) jump off from the end of the open circuit. Yes, arcing is a common occurrence. Unfortunately, nowadays it is useless (and illegal) for RF communications. BTW, nuclei is plural for nucleus and there are no electrons in the nucleus. -- 73, Cecil, w5dxp.com |
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