"Rob" napisal w wiadomosci
...
Szczepan Bialek wrote:


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.

Air is not perfect insulator. Counterpoise has a big surface.


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.

The selfcapacitance of an antenna is very small. You need a couple of
electrons to have a measurable static voltage.
For this reason the earth/chassis/counterpoise is necessary.
S*