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Old April 21st 12, 04:51 PM posted to rec.radio.amateur.antenna
Szczepan Bialek Szczepan Bialek is offline
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Posts: 707
Default Autoelectronic emission


"Jeff Liebermann" napisal w wiadomosci
...
On Sat, 21 Apr 2012 09:24:03 +0200, "Szczepan Bialek"
wrote:

Electrons escape from each charged body. Your antennas emit electrons and
for this reason they need the sink of electrons (the earth/chassis/
counterpoise).


Great theory. If antennas emitted electrons, and electrons have mass,
we could then build a rotating antenna powered by the electron
belching reaction mass. Put the antenna on a hub, and watch the
electron emissions turn the antenna as they fly off the antenna at
ummm... the speed of light. A few hundred watts of power should be
more than enough to move the antenna around. Yeah, great physics you
have there.

Hint: How fast do electrons travel in a wire?
No, it's not the speed of light. It's called electron drift velocity.
http://en.wikipedia.org/wiki/Drift_velocity
http://www.jensign.com/JavaScience/www/cuwire/cuwire.html
For the above example, it takes about 12 hours for an electron to
travel 1 meter in a copper wire. Not exactly at RF speeds.


The air molecules travel with the speed of the wind. But they oscillate if
there is the sound source.
The speed of sound and the speed the wind are the different things.

The same is with the electron waves speed and the electron beam (drift)
speed.


Keep trying. Eventually, you'll get something correct.
S*