"Straycat" wrote in message
y.com

I bought a box of medical grade ac power cords at the local junk
store. They are just like the computer and office machine power cords
that are very common, except that there is a sheild on the ac lines
in addition to the normal ground wire. The ground wire itself is on
the outside of the sheild wrap.

I was wondering if it would be useful to install 3 conducter chassis
sockets on my stuff and use these cords.

Sonically this is a study in futility unless you have an environment that is
very noisy, electrically. In that case it would be wise to clean up the
noise sources rather than put band-aid shielded power cords on everything.

Right now I have two monster
cable power strips supplying ac which have the grounded outlets.
These are plugged into a medical grade outlets on a seperate circuit
breaker. Another circuit breaker, on the same side of the main panel,
supplies ac power to the computers, again through monster cable power
strips. I mention this because the computer systems are sometimes
connected to the recording inputs and outputs of the audio system.

Sure and this is almost always done with conventional power cords with no
ill effects.

The only problems I have not resolved are that the computer is
connected to a DSL modem / Router which is connected to the phone
line. This phone line has surge protection, but no sheilding.

Phone lines are twisted unshielded twisted pair, and the twisting of the
pair is adequate in millions of cases.

There
is an FM antenna system, but no cable TV or other static source
connected. There is a low level AC line buzz in the system but it is
only audible at extreme levels of volume setting, well beyond any
usable audio level. It is not an issue. There is also no other
interfereance such as radio tv etc. Is putting this work into the
system a waste of time? Has anyone experimented with sheilded ac
cables and noticed any kinds of effects?

Let's put it this way. If an audio system has no problems with audible noise
pickup through power cords, is experimenting with shielded power cords a
waste of time?
Carl