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
_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK
