Richard Clark wrote:

Going further, it isn't even necessary to drive temperatures to the
basement for improved conduction. Carbon nanotubes are exemplars of
high conductivity (several orders of magnitude better than what we
consider good metals) at room temperature where a carbon macrotube
would be called a resistor. Conductivity and superconductivity
research has long ago left the realm of temperature and has entered
the realm of crystal alignment.

However, even this academic. Carbon Nanotube construction at a scale
to compete with standard copper wire is off by a scale of a million to
billions (of dollars, much less practicability).

This may have changed also, I'm no expert in superconductors (though I
do play one on TV) Don't the high temperature superconductors have
issues with current capacity, and does this translate into problems with
impedance?

- 73 de Mike N3LI -