[sdiy] On shielded cable (or not) for audio

[Ian Fritz]

At 10:34 PM 7/6/2009, Scott Nordlund wrote:
>(a) (coax) would mean that the wire is carrying the signal and the shield 
>is grounded.

Actually, coaxial means that the wire and shield share the same geometric 
axis.  The shield is not always grounded.  For example, in instrumentation 
work it is commonly used to carry a guard voltage.



>  If you twist a wire together with a ground wire that isn't carrying a 
> complementary current (which I think has been discussed here before), 
> it's just a weaker form of (a), but this may be good enough in most cases.

My experience is that for sdiy work it is usually fine.  The main advantage 
over coax is that it is easier to do.


  Ian