"christofire" wrote in message
...

"Szczepan Bia³ek" wrote in message
...

-- snip --

Do you know somebody who has more proven reputation in acoustic and
electrodynamics than Helmholtz?


* Yes: the late John D Kraus. He was a practical engineer as well as a
theoretician and his native language was English. He managed to put
into practice a lot of the theory that others had written about and he
recorded his work lucidly. I've already named two of Kraus's books -
can you cite something written by any of your favourites that provides
clear explanations that you understand? Answers.com doesn't explain
anything technical.

For practical engineers the math theory is useless.

* No, that's quite wrong. Practical engineers use mathematics a great
deal. Amateurs may not, but they're not all engineers. To make a
statement like that it would appear you have never worked successfully as
a practical engineer using the conventional definition of 'engineer': a
person trained in any branch of engineering.


* Heaviside's documentation is appaling! I remember going through a
catalogue of his work in an effort to get to the truth about the origin
of the 'Heaviside condition' - a lot of it was written in obfuscation
babble, a bit like some of the contributors to this group.

He is the father of the hydraulic analogy where the electricity is the
incompressble masless flud.
Electrons in antenns are compressible and have mass. What is electricity
in J. D. Kraus?

* It's the passage of charge through conductors, the same as it is
everywhere else, of course. Compressibilty of electrons doesn't feateure
in any of Kraus's books that I've read, which must mean it is not a
necessary concept for normal, physical, antennas and propagation.


* What 'two loudspeaker'? If you're drawing comparison between a
direct-radiator loudspeaker and a dipole and using that as a basis for
saying that EM waves are longitudinal, as I suspect you are, then you
should also consider a horn loudspeaker. Sound is radiated from the
mouth of a horn 'speaker and the other side of the compression driver
diaphragm can be totally enclosed. There is no simple comparison with
a dipole antenna in this case.

The horn is a monopole. See:
http://paws.kettering.edu/~drussell/Demos/rad2/mdq.html
The unboxed loudspeaker is a dipole.

* Why don't you look into horn louspeakers and then report back. You
may find them fascinating and very unlike dipoles.

Like fascinating is the two monopoles antennas (your dipoles).
S*

* You claimed that EM waves are longitudinal, like sound waves, and you
used some comparison between a loudspeaker and a dipole as justification.
So now you understand that not all loudspeakers behave that way ... so
what? Do you still believe EM waves are longitudinal or have you changed
your mind? If you believe Dan Russell then where on his site does he state
that EM waves are longitudinal? Of course, he doesn't.

On second thought, don't bother replying - this dialogue is going nowhere
and is a waste of our time.

Chris

only if you take it seriously... i consider it great entertainment!