[Iain Churches]

"Chris Hornbeck" wrote in message
...
On Tue, 29 May 2007 08:31:07 +0300, "Iain Churches"
wrote:

I have just be evaluating a German built tube amp
(4 pairs of EL34 in push pull parallel) It was supplied
with a mains cable, which in addition to the L, N and
Earth wires, had an external woven copper plaid
screen/shield, under the clear plastic outer cover.

This shield appears to be connected to ground at
the amp end only.

I have seen something similar in studio/broadcast
control room racks, where test equipment was built
in, and powered from an AC outlet within the same rack.
The mains leads had a screen to prevent the possibility
of AF signals affecting measurements.

But what about in the case of audio equipment
built for use in the domestic environment?
Any opinions?

Most all music-oriented audio guys will tend to forget
completely about all of the other "invisible" AC wiring
contributing to their little slice of heaven. Here
in big-time audio land, I have completely shielded
oxygen-free wiring from all sockets back to the breakers
and all of the way back from my house to Nuclear One in
Russellville, the only really pure source of power in the area.

Anybody who does less is just kidding himself.


Thanks Chris. I value your opinion:-) I am glad to see
that you are keeping up the traditions of the true audiophile:-)

But seriously, this cable is included with the amp as a replacement
for the standard IEC kettle cable which we use in Europe. There
was no big fuss or hype. I was interested to know what the thinking
behind it might be.

Perhaps they just wanted to supply a product with high perceived-
quality down to the last nut and bolt.

Cordially,
Iain