"Szczepan Bia?ek" wrote:

wrote ...
Szczepan Bialek wrote:


Does exist an insulation (reasonably thick) which is not transparent for
the
radio-amateur frequencies?
S*

You obviously do not know that the amateur frequencies start at 1.8 MHz
and include everything above 300 GHz.

Within that range of frequencies, there are lots of materials that are
"insulators" that have large dielectric losses.

See:

http://en.wikipedia.org/wiki/Permittivity

and in particular:

http://en.wikipedia.org/wiki/Permittivity#Lossy_medium

" For frequencies at which dipole orientations cannot follow the applied
field due to the viscosity of the medium, absorption of the field's energy
leads to energy dissipation"

Yeah, so what?

You do understand that they are referring to the molecular dipoles in the
insulator, don't you?

You are a babbling idiot.

I am collecting evidences. Thanks for your input.

Evidences (sic) of what, that you are a babbling idiot?

So, next question:

The "energy dissipation" means heat.

Of course.

In case of the bare wire the air is heated.

Nope.

This just shows you have no idea what permittivity and conductivity mean and
you haven't a clue what you are babbing about.

For isolated the insulation.
Is it possible to burn off an insulation which have large dielectric losses?
S*

If you had the slightest understanding of the very first equation of the
referenced link and the text that follows, you would know the answer is yes.

Since you apparently read the link and still asked the question, I can only
conclude you are an idiot.



--
Jim Pennino

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