"Ian" napisał w wiadomości
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"Szczepan Bialek" wrote in message
.. .
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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*
Hello again Szczepan .
You used the term "dobled". Was it a typing error on your part?
Yes.
Are we discussing spark transmission and non-resonant aerials?
The earth/chassis and the field electron emission..
S*