Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

surface or cross section
surface or cross section
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 31st October 2002, 03:21 AM   #1
theChris is offline theChris
diyAudio Member
Join Date: Dec 2001
Location: SIUE, Illinois, USA
Default surface or cross section

As far as where current flows, I've heard the following conflicting views:
1.) DC travels throught the cross section of a wire with uniform charge (or current?) density.
2.) AC travels closer to the surface, depending on freqency.
3.) Static charge sits on the surface.
and then:
4.) AC and DC travel on the surface ONLY, thus making the only important aspect of a wire the surface area, cross sectional area is not important.

the first 3 are from physics, the last is from an EE. I feel the first 3 make sense, where the 4th doesn't
if only it could be used for good, not evil...
  Reply With Quote
Old 31st October 2002, 07:51 AM   #2
planet10 is offline planet10  Canada
diyAudio Moderator
planet10's Avatar
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
surface or cross section
Default Re: surface or cross section

According to Malcolm Hawksford an AC signal doesn't travel in the wire at all, but in the field above the surface of the wire.

community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 1st November 2002, 01:04 AM   #3
fdegrove is offline fdegrove  Europe
diyAudio Senior Member
fdegrove's Avatar
Join Date: Aug 2002
Location: Belgium
Default AWG


Just form the top of my head:

From what I concluded from Dr.Macolm Hawksford studies the ideal diameter for an interconnect would be 0.6mm,ideal dielectric would be air.
More metal would increase skineffect.
It is however a complex matter but the proposed cross section seems to corelate perfectly with experiments carried out in listening tests.
For sonic bliss other factors such as cable capacitance play an important role,Dc resistance too etc.
In a word it is a bees' nest.
FWIW,in my designs I go for low dc resistance and low capacitance/m.
If higher currents need to pass unimpeded I suggest bundling a number of the same cross section wires.
I always use solid core wire.Always!
Other factors are geometry,shielding,solder composition etc.
So far it seems to pay off.

What Dave suggests,I've read that somewhere as well but I'm a bit err... resisting on that theory.

Best regards,
  Reply With Quote
Old 1st November 2002, 08:43 AM   #4
dhaen is offline dhaen  Europe
diyAudio Moderator Emeritus
dhaen's Avatar
Join Date: Jun 2002
Location: U.K.
According to my practical experience over the years, a and b are both true.
I'm sure this is not the whole story, but the theory explains all effects I have observed.
  Reply With Quote


surface or cross sectionHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Change cross-section layout for TABAQ ? tsll Full Range 5 2nd April 2008 09:38 PM
Akabak: modelling horn bends and cross-section discontinuities philpope Subwoofers 0 31st July 2007 03:02 PM
TL - cross section 00940 Multi-Way 4 16th August 2006 01:10 PM

New To Site? Need Help?

All times are GMT. The time now is 04:14 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio