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Autoelectronic emission
Szczepan Bialek wrote:
"Rob" napisal w wiadomosci ... Szczepan Bialek wrote: Congratulations. You've discovered the counterpoise. That's a good idea (but not necessary) for a monopole, where the grounded counterpoise forms the missing element of the dipole. No. The counterpiose is the ground. How can a counterpoise or chassis serve as an infinite source of electrons? They work like the receiving antenna of the cristal radio. Electrons from the air go into metal. That is not what an antenne does. Counterpoise is exactly like underground "ground". But if the soil is dry sand or the rock there no free electrons. It is better to place the conductors in the air. But they are not connected to a source of free electrons, so if those would be required they would be depleted pretty quickly. When your theory would be right, the counterpoise would get charged just like the antenna. In reality this does not happen. It is not my theory. It is Marconi antenna and his theory. But is is wrong, we know today. The counterpoise only serves as a place to dump AC current (the output of the transmitter) during the cycle of radio frequency output. It is not (and does not need to be) an infinite source of electrons because elecrtrons are not emitted by the antenna. Where the voltage is there must be the electron emission. Experiments with the photoelectric effect shown that no current below 10V. But it apply to the flat cathode. If the cathode is a wire the voltage is lower. And what is with your antenna in sunny day? S* Even if there are a couple of electrons that jump off the antenna, it is not going to cause a measurable effect. You need more than a couple of electrons to have a measurable current, and it is not going to happen at those voltages and daylight conditions. |
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