Home Propeller Head Plaza

Technical and scientific discussion of amps, cables and other topics.

[ Follow Ups ] Thread: [ Display  All  Email ] [ Propeller Head Plaza ]
[ Alert Moderator ]

Shielding is capacitive, not "inductive",

Hi.

Any shielding wrapped around a conductor generates conductor-to-shielding capacitance & its inversely proportional to the Log10 of the ratio of the inner diameter of the shielding & the diameter of the conductor inside the shield sleeve.

For multi-conductor cable, like a 3-wire power cord, more capacitances are generated: inter-capacitance btwn EACH condudctor & the common shielding as explained above, plus capacitances betwn EACH conductor.

That's why I try the utmost to refrain from using any shielding on my DIY ICs & power cords. I heard reports on shielding impairing sound bigtime.

Hence you can detect the sonic difference of the two different power cords you tested due to the different combined capacitances caused by the different spacing of the shielding of each cord.

This scientifically explanable, not voodoos.

Of course, capacitance is only one of the factors that affect the sonics of a cable.

Any magnetic ring snapped onto any conductor will change the conductor's free-space impedance: 377-ohm (ratio of electro-magnetic fields E/H). More variance from this 377R impedance will prevent the conductor from acting as an antenna in picking up the unwanted EMI/RFI. This is how those snapped on ferrite suppressors work on a cable.

By sliding the ring along the conductor, or cord to a critical position to provide the max E/H mismatching, the best EMI/RFI suppression can be achieved. I have read reports on its pronounced sonic effect on an audio system via a power cord, ICs etc etc.

I am using those ferrite ring wrapped onto my unshielded power cords,
& ICs.

c-J


This post is made possible by the generous support of people like you and our sponsors:
  Schiit Audio  

Follow Ups Full Thread
Follow Ups
You can not post to an archived thread.

[ Top Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2025, Audio Asylum, all rights reserved ]
[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]