Thread: The earth
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Old April 19th 12, 06:29 PM posted to rec.radio.amateur.antenna
[email protected] jimp@specsol.spam.sux.com is offline
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First recorded activity by RadioBanter: Jun 2006
Posts: 1,898
Default The earth

Szczepan Bialek wrote:

"Rob" napisal w wiadomosci
...
Szczepan Bialek wrote:
I believe in each your word. But I simply do not know where in your
equipment the "large conductor" is.


In your statements, you never specify what a "large conductor" is.


Here you a
"". In electronic circuit theory, a "ground" is usually idealized as an
infinite source or sink for charge, which can absorb an unlimited amount of
current without changing its potential. Where a real ground connection has a
significant resistance, the approximation of zero potential is no longer
valid. Stray voltages or earth potential rise effects will occur, which may
create noise in signals or if large enough will produce an electric shock
hazard.
The use of the term ground (or earth) is so common in electrical and
electronics applications that circuits in portable electronic devices such
as cell phones and media players as well as circuits in vehicles such as
ships, aircraft, and spacecraft may be spoken of as having a "ground"
connection without any actual connection to the Earth. This is usually a
large conductor attached to one side of the power supply (such as the
"ground plane" on a printed circuit board) which serves as the common return
path for current from many different components in the circuit." From:
http://en.wikipedia.org/wiki/Ground_(electricity)


In this case what is being discussed is electrical safety, not radio.

Portable radios do not have a "large conductor".

Portable radios do not have a "large conductor".

Today, transmitters are often very small and still they work OK without
any earth connection.
How large should a "large conductor" be?


Adequate to electron emission.


There is no electron emission.

Probably it is the coax: "Many conventional coaxial cables use braided
copper wire forming the shield".


The transmitted signal flows only along the inside of the shield of the
coax. The outside is supposed to carry no signal. If it does, there is
a problem with the antenna system.


The outside is the "large conductor".


Portable radios do not have coax.

I also belive in each Tesla's word. He discovered that in his secondary
coil
is the oscillatory electron flow from the earth into the air.
Why is it impossible?
S*


We do not operate our transmitters in the region where electrons start
flowing into the air, because we do not like arcing. Tesla did, but he
was in a different business.


Electron do not start.
Electrons are flowing into the air (and vacuum) at each voltage.


No, they are not.

The thin wire is the best "cold cathode".


Gibberish.

What are your antennas made of?


Usually aluminum tubing or copper wire for fixed antennas and usually
chrome plated steel for portable antennas.

Antennas do not have a chassis.