"Roy Lewallen" bravely wrote to "All" (08 Apr 05 15:05:11)
--- on the heady topic of " VF, low-loss line, high-impedence line -
relationship"

RL From: Roy Lewallen
RL Xref: aeinews rec.radio.amateur.antenna:28146

RL Asimov wrote:
Is there any electron current in the conductor or not?

RL In a perfect conductor, no. In a real but good conductor like copper,
RL it's confined to a very thin layer at the surface. Look up "skin
RL effect" in any electromagnetics or basic text on RF, or google it.

If I put an RF voltmeter/ampmeter at any point along the perfect
conductor I will get a zero reading is that right?

So then if the conductor was perfect then I wouldn't need a conductor
at all in the first place? Seems a shame to waste perfect unobtainium
just to have the last word. ;-)


RL First of all, a mismatch doesn't cause loss.

An impedance mismatch in any medium causes a scattering of the energy.

RL If I connect a 50 ohm source to a one wavelength, 300 ohm transmission
RL line and connect the other end of that line to a 50 ohm resistor,
RL there's a 6:1 mismatch at both ends of the line.
[,,,]
RL No loss is caused by the mismatch. No "scattering of energy occurs".
RL All of the energy from the source arrives at the load, where it was
RL intended.

So why bother with high priced cable when a piece of clothes hanger
will do just as well, encantations? I think your are still in April 1
mode, Mr.Roy. We are way past diatribe here, thank you.

A*s*i*m*o*v

.... Pandora's Law: Never open a box you didn't close yourself