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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: Re: Shielding is capacitive, not "inductive", posted by Soundmind on November 7, 2006 at 05:04:38:
Hi.Audiophiles, like my humble self, who tweak with audio ICs & power cords is to try to mprove the sound of their rigs, hopefully.
Most of them is not trying to "solve any problems" at all as you think so.
Given discerned ears via highy resoluted sound system, we can easily detect the difference among cords & ICs of different makes & builds
due to L, C & R of the interfacing networks between components.It is OK that one can settle down with stock SJT power cords available for only a few bucks from any electronic outlets, e.g. the Source or the Shacks, just like many find beef burgers are good enough for their meals.
But for tuned ears who demand the best, stock power cords are just NOT good enough sonically, just like fine diners, regretfully I am one, who are normally reluctant to go for fast food. They would prefer better sounding power cords which those specialty cable makes would make safe for low voltage/low current electronic application.
Of coure, nothing comes free. You got to pay for the added values.
Back to your moot argument on heat generated by cable shielding. FYI, shielded power cables with UL & CSA listing are used everyday in the building, mining & power industries in northern America.
Ever heard of Teck cable? For operation voltages 5KV & up, UL & CSA specify shieldings for individual insulated conductors & overall metal shielding for all the conductors in the cable. This is strictly for HV insulation breakdown protection.
How come your imagination on shielding, being "dangerous" would overheat the conductors which would increase its resistance, resulting voltage & power drop ?
If there were significant voltage drop, mostly cases are due to too small gauge sizes of cable used, not due to shielding. Too much imagination, my friend.
The filler or "cordage" used inside a power cable serves a few purposes:
(1) fill up the uneven gaps over the cable conductors to form a smooth & round substrate for the cable jacket extrusion, which is crucial for certain industries, such as borehole mining where cable with smooth even surface is a must.
(2) allow the conductors inside the cable jacket to stretch & move easily upon bending & twisting of the cable without damaging the jacket.
(3) provide vibration absorption for portable application, e.g. power cords for equipment.
I am not nickpicking you. I just want to prevent misunderstanding.
c-J
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Follow Ups
- Apple vs orange, again. My Newyorker friend. - cheap-Jack 08:37:12 11/07/06 (7)
- Re: Apple vs orange, again. My Newyorker friend. - AJinFLA 16:27:44 11/07/06 (6)
- Answer - E-Stat 17:54:12 11/07/06 (5)
- An "Answer", but not an explanation. - AJinFLA 18:46:44 11/07/06 (4)
- Sure - E-Stat 06:17:49 11/08/06 (3)
- Re: Sure - Soundmind 08:42:40 11/08/06 (2)
- Theoretically yes, but - cheap-Jack 08:58:30 11/08/06 (1)
- Re: Theoretically yes, but - Soundmind 09:22:23 11/08/06 (0)