> In a message dated 7/21/2010 12:14:24 AM Greenwich Standard Time,
> firstname.lastname@example.org writes:
> Copper strap is REALLY expensive! Has anyone used welding cable with any
> success and longevity? Other materials? My #4 grounds are OK, but how to
> a lower impedance ground system without taking out a second mortgage?
> I was lucky enough to get some old air filled hardline which I pounded
> flat and used that. It works if you only need short runs since it does take
> some time to flatten.
A round tube has basically the same inductance as the same tube
flattened (within a few percent)
For a given amount of copper, a strip is better than a solid wire, but
between hollow tube and strip, there's not much difference.
The difference is that a strip can carry current on both sides, while a
tube can only carry current on the outside. But that's true for a
flattened tube too.
If you were to split the tube and open it up, then you're looking more
like a strip.
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