Copper foil


I just recently started a DIY project and wanted to know if anyone knows of a copper foil distributor or manufacturer. I am looking for .0075 thickness which is hard to find. Also, if you have info using the copper foil I am curious how you are using it in your system.

Thanks
la45
An old hifi-troll enters the thread ;P
Speakercables are the component that ruins sound most, to keep them short as possible minimize loss. An old hifi-legend says that energy only use the outside of the conductor, leading hifi-nuts to think that thin foil-conductors would be the optimal solution.
But the whole legend is wrong, current goes deeper than skin-deep, big area conductors is the optimal solution, short & massive.

Years ago a friend showed me his copperfiol-cables thinking he had found the optimal solution. (after uppgrading his filter-coils wsith CFC-ciols; a lot of folks didn`t understand why the foil-coils sounded cleaner))
After liustening a bit I pushed him to make up a set of solid-core copper cabes to compare, about 13awg. Result: a lot cleaner, more open sound and better dynamics. Why? When using a thin foil-conductor the amp looks into jus that; a thin/flat conductor.(like with a multistranded cable)
Thin cables sounds thin and are dynamic-killers. Take a look inside your amp; see the power-circuits dimensioning? The speakercables shoulkd be at least as thick as that circuit, and allways solid.
Off course a triode-amp playing into a hyper-effective horn system wount need the same leader-area as a powerful passiv fullrange. But the key to weightless dynamics is to uppgrade the complete powercircuit, from powercables (solid!)trafos, speakercables and passive filters. (or avoid the last two :S)

Conclution: find some solid copper, say 10awg or even thicker and listen to what happens to your sytem. If you turn up the volume a bit the copper will open up in about an hour. No more hars "details", cleaner vocals and huge bottom-end power. If the boyttom seems fat; add more copper(!) to improve control.
Have fun!
Palerider,

I have a pair of Paul Weitzel designed CRL/FIM speaker cables and a couple of his power cords. All use solid core copper in heavy gauge configurations. I would agree with your assessment on these types of cables as to how they influenced the sound in my system. However, I am currently using some stranded smaller gauge speaker cables and interconnects designed by Dale Pitcher at Intuitive Audio and I have to say I don't feel I'm missing any dynamics. As for thin sounding, maybe it's the solid core wire accentuating the sound. Hard to tell which is which from my perspective, but I enjoy both sets of cables in my system so I guess that's what counts.
Palerider, Far from "hi-fi legend," skin effect at AC is well documented as variation in impedance against frequency that occurs at difference depths of a conductor. The effect becomes pronounced at frequencies above a few kHz. It's not true that signal travels only on the surface of the conductor, but it is true that the larger a conductor's diameter, the more skin effect causes audible frequency shift. This is why litz wiring was conceived.

Ribbons sound great because of reduced skin effect. However you are correct that adequate conductor guage is also significant. The 2"x .005" copper ribbons I'm using as speaker cables have a cross-sectional area of 6.45 mm2-- about the same as a 9awg round wire.
Before you start claiming that skin effect is significant above a few kHz do the calculations. The effect is vanishingly small in the kHz range. I speak as someone who works in the GHz range
Rather than explore relevant Bessel functions & Maxwell equations in a non-technical forum, I suggest that doubters spend $100 at McMaster-Carr for some electronics-grade copper of equivalent gauges in both formats & experiment. You will be surprised.