Topband: electrical wavelength

[Tom W8JI]

> Run the numbers and for RG-6 we see that sq root of L/C is good above a
> couple hundred kHz.
>
> Dave WX7G

I just ran it in MathCAD and it showed a Zo and Vf slope starting down 
around 150 kHz, but I assumed the conductors were solid copper. Conductors 
have to be in the thousands of a inch range thick to cause an HF slope, 
because skin depth is .00256 inches on 1 MHz for copper.

I cannot understand the HF and higher numbers at all, where it is all pretty 
much set by the dielectric constant slowing the TEM wave.

I don't even think it would be a practical concern down to 100 kHz or so 
where copper skin depth is .0081 inches and we might be getting into the 
steel core, or am I missing something here?  :-)

73 Tom