Thread: The earth
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Old April 18th 12, 06:25 PM posted to rec.radio.amateur.antenna
Rob[_8_] Rob[_8_] is offline
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First recorded activity by RadioBanter: Dec 2008
Posts: 375
Default The earth

Szczepan Bialek wrote:
Each transmitter needs " an infinite source or sink for charge".

The above you know.


I know that it is not true.
A transmitter needs no infinite source or sink for charge because it
does not generate any DC current into the antenna.


It is true because it generate the oscillatory flow of electrons into the
antenna.
In such case the DC ammeter idicates the current.


It is a pity that you don't have a transmitter, or otherwise it would
be easy for you to see for yourself that you are talking nonsense!

There is no DC current from a transmitter into the antenna.

But some of you do not know that where the voltage is there is the field
electron emission. So the sink is necessary.

It must not be infinite. "a large conductor" absorb the electrons from
the
air. So its size must be adequate to the emission.


Ok so we can finally rest the case and agree that a connection to
earth is not required for a transmitter, something you have claimed
all the time because Marconi wrote it.


Marconi wrote:
""By "connected to earth" I do not necessarily mean an ordinary metallic
connection as used for ordinary wire telegraphs.
The earth wire may have a condenser in series with it, or it may be
connected to what is really equivalent, a capacity area placed close to the
surface
of the ground (Fig. 4)."

" a capacity area placed close to the surface of the ground" = " large
conductor "

The case will be ready to rest if you admit that Marconi was right in his
Nobel lecture.
S*


No, he was not right. And you have described yourself what was wrong
in what he wrote.