"Rob" napisał w wiadomości
...
Ian wrote:
"John S" wrote in message
...
On 7/3/2012 1:09 PM, wrote:
Then why not just ignore him?
We (the group excluding Szczepan) have some good discussions.
Szczepan can be amusing in the views he puts forward. I can't work out
whether he is trying to tease us or really is confused.
I suppose there's also the hope that Szczepan might read and understand
the
information that some of us are showing him. It's a bit like trying to
explain radio to a youngster except that a youngster will listen and
learn.
I think it is not productive to reply to every posting with "you are
a babbling idiot". That is not going to convince him that he is, and
it just annoys the others.
When you ask him real questions, he either does not answer or he digs up
some prehistoric finding that may have been accurate at that time, but
can easily be disproven today.
For example, his theory that an antenna acts like a vacuum diode, emitting
electrons during one phase of the HF voltage and not taking them back
during the next phase, clearly must be wrong.
The antenna always has the counterpoise:
"A counterpoise which consists of one or more wires in a network insulated
from the ground will often reduce loss resistances which might occur when
the quarterwave antenna is connected to poorly conducting earth. The
counterpoise in the case of a network of several wires acts as a condenser
plate with high capacity to earth, with the result of lower loss in the
antenna system; for this reason the counterpoise should be fairly close to
the ground. [See Fig. 1.] "
From:
http://www.antennex.com/shack/Dec06/cps.html
Joel dipole has the two legs.
One of them is the antenna and the second the counterpoise.
If it were true, an antenna
would be a nonlinear element that would cause intermodulation. As we
don't see that happen on a well-designed antenna (it *does* happen when
there are bad contacts with diode-effect in the antenna), we know that
an antenna by itself cannot be nonlinear and so there cannot be a net
flow of electrons.
The net flow of electrons is from the counterpoise to end of antenna.
S*