Ralph Mowery wrote:

I have seen some coax where the center conductor is aluminum with a
coating of copper, but this is for use at radio frequencies where the
skin effect is very much in effect.

CATV coax (RG-59, RG-6, RG-11) uses a STEEL center conductor for
strength, not aluminum. The figure eight version for drops hs an added
stainless steel messenger wire. .500", .750" and larger trunk cables use
aluminum to reduce the weight, but the .750" and larger trunk lines have
to be able to handle 30A on the center conductor. .500" is only used to
feed line extenders or line taps, and needs to be able to carry 15A.
CATV line equipment is typically powered by 60 VAC modified sine wave
from a large pole or pad mounted CVT, but some early 12 channel hardware
was powered by 30VAC modified sine wave power supplies. This was mostly
obsolete by the '70s.



--
Never **** off an Engineer!

They don't get mad.

They don't get even.

They go for over unity! ;-)