Re: need help choosing between line level cables

On Wed, 16 Apr 2008 07:06:36 +0100, Eeyore
<rabbitsfriendsandrelations@[EMAIL PROTECTED]
> wrote:

>> Ground loops are systemic and subtle, and include the
>> summed parasitic couplings from all devices' mains to
>> each device's nominal Earth. It's a non-trivial summation.
>
>What do you mean by 'nominal earth' ?

Earth ground is an abstraction and all other "grounds" are
local and to some degree contaminated. If there's a better
term, I'll use it, but haven't heard it (yet).

>What you haven't mentioned and it's far more insidious is the effect of
>the Y filter caps in switched mode power supplies that create a leakage
>current to ground if you attempt to supply a mains ground to a system
>incor****ating such a device. This is the usual source of 'hum' when
>connecting laptops to audio sysyems when using their mains adaptors
>(whether 2 or 3 wire).

That's an excellent example. Local nominal ground is
contaminated by local garbage and causes a systemic
problem.

Much thanks, as always,

Chris Hornbeck