On Feb 13, 10:18*am, "Szczepan Bialek" wrote:
Uzytkownik "tom" napisal w wiadomoscinews:4d572454$0$87583$8046368a@newsreade r.iphouse.net...

On 2/12/2011 12:06 PM, Szczepan Bialek wrote:

Of course. But the longitudine waves transport mass (electrons) and are
not
symmetric. Jumping off is stronger than sucking *back.

Tesla is not applicable here, an antenna is not a cathode and does not act
like one. *Neither is it made of a material that is cathodic at room
temperature.

Field emission works at each temperature and each material. It is voltage
and temperature dependent. Also: "How would the ideal field emitter look
like? It should be very long and very thin, made of conductive material with
high mechanical strength, be robust, and cheap and easy to process."



So where else does it say the current is asymmetrical?

The emission current from AC lines is. But there the electrons flow to
ground. In the lines no open circuit.
In open circuit *the voltage is doubled (at least) at the end. If some
electrons jump off than the suction voltage is lower. If an antenna radiate
the VSWR is low = some electrons do not come back.

In the giant Warsaw dipole was: "In the lower half of the mast, there was a
vertical steel tube, attached to the mast's outer structure with large
insulators. This tube was grounded at the bottom, and connected electrically
to the mast structure at half the total height. This technique works by
applying a DC ground at a point of minimum radiofrequency voltage,
conducting static charge to ground without diminishing the radio energy.
Static electrical charge can build up to high values, even at times of no
thunderstorm activity, when such tall structures are insulated from ground.

Guess why the static charge is build up?

S*

if there is any breeze: http://en.wikipedia.org/wiki/Triboelectric_effect

or just the clear air electric field: "In fine weather, the potential
increases with altitude at the rate, according to some writers, of
about 30 volts per foot (100 V/m).[3]"
from http://en.wikipedia.org/wiki/Atmospheric_electricity