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"

You are a babbling idiot.

I am collecting evidences. Thanks for your input.

So, next question:

The "energy dissipation" means heat.

In case of the bare wire the air is heated. For isolated the insulation.
Is it possible to burn off an insulation which have large dielectric losses?
S*