"Ian" napisał w wiadomości
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"Szczepan Bialek" wrote in message
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Użytkownik "Ian" napisał w
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"The earth connection is not necessary in order to receive signals."
It is necessery to transmit and to receive.
You have it: "The "static to earth" in my HF aerial is merely to get the
static to bypass my receiver".
The liberating of electrons by a transmitter and absorbing by a receiver
is a by products of antennas.
The "earth connection" is a remedy.
Best Regards,
S*
Hello again Szczepan.
I'm sorry to say that I didn't understand this part of your posting:
"Each antenna liberate EM waves, heat and electrons.At the end of the mast
the voltage is dobled and the "field emmision" works. The heat is no
problem but the escaping of electrons is a problem."
Do you mean "mast" or "aerial" when you say that the voltage is dobled
(sic)?
Not dobled but doubled (twice as large). It is desribed by Lodge: See Fig.2
:
http://www.antiquewireless.org/otb/lodge1102.htm
"The electrical waves produced by the oscillations at A traveled along the
wires and were reflected at the far ends. Lodge knew that the longer spark
at B3 was due to what he called the "recoil impulse" or "recoil kick" at the
end of the wires where the waves were reflected.[4] At spark gap B3 both the
incident wave and the reflected wave had their maximum values and were in
phase. This produced a voltage twice as large as the voltage at spark gap
A."
"Tesla discovered that the one end of the dipole must be earthed to have
the strong waves."
This is definitely something that I will not be doing. A dipole has low
impedance at the feed point and high impedance at its ends.
A dipole with one ene earthed becomes a monopole.
Hertz transmitter is a dipole. The Tesla's is a monopole.
Todays dipoles are simply the two monopoles.
Thanks this the waves are polarized.
But the question is if Marconi was right:"
"The necessity or utility of the earth connection has been sometimes
questioned, but in my opinion no practical system of wireless telegraphy
exists
where the instruments are not connected to earth."
Best regards,
S*