|
Cable Asylum Interconnects, speaker wire, power cords. Ask the Cable Guys. |
|
|
|
Cable Asylum Interconnects, speaker wire, power cords. Ask the Cable Guys. |
|
In Reply to: Skin effect, The FACTS posted by Tweaker456 on March 19, 2014 at 14:43:21:
The "skin effect" is a result of the conductivity of the conductor. Have a different conductor? Skin effect is different. And the better the conductor, the shallower that skin effect.
I am not sure an electromagnetic text would talk about losses, but it would likely take about the decay of fields as you go deeper in a conductor, and how many skin depths deep something is - since it is an exponential function, and not uniform in current density.
The likely biggest effect is the change in inductance since the electricity will have the majority of the charge gathering towards the surface as you get higher in frequency.
Incidentally, this is why Litz wire tends to have fairly uniform conductivity over frequency, and is the principle under which Audioquest and Kimber work (though they approach it differenlty).
It is also why silver conductors can be a little thinner than copper - silver has a higher conductivity than copper.
I'll leave it to the readers to figure out if it makes a sonic difference, but a single thick wire will have different inductance over frequency. A thinner one will have higher inductance, but likely will change less over the same frequency range from DC to whatever upper limit you care to measure. Litz wire, if selected carefully, will maintain pretty uniform conductance over a wider range which is why it was a popular conductor until they invented coaxial cables.
And coaxial cables use geometry to balance L and C over a very wide frequency range, and have a uniform propagation constant.
And nearly every "high end" cable maker draws from one aspect or approach surrounding this or others in order to make their cables.
So while your statements are somewhat simplistic, it's not that applicable in many cases. If it were simply resistive losses through cable it all would be a whole lot easier. And RF and Microwave frequency engineering would be tons easier ...
====
"You are precisely as big as what you love and precisely as small as what you allow to annoy you." ~ R A Wilson
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Really? Because that's now how EM PhD's talk about skin effect .... - Bromo33333 18:42:49 03/19/14 (1)
- RE: Really? Because that's now how EM PhD's talk about skin effect .... - Tweaker456 13:19:27 03/20/14 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2024, Audio Asylum, all rights reserved ]
