In article ,
Serge Auckland wrote:
Maybe I have lead a sheltered life since I moved to the country.... :-)
My experience is otherwise, that decent equipment doesn't hum or pick
up RF if half-decent screened cable is used. I do accept that I've had
some trouble with SOME switched-mode powered equipment which was cured
by the use of an isolating transformer. I assumed that was an isolated
example.

Indeed. I've got a pretty big installation here with some stuff in one
part of the room - TV, PVR, satellite receiver - and the main audio stuff
at another. All interconnected unbalanced. It's also linked to sound and
vision in the kitchen so I can have the same thing playing etc while
wandering between the two. And no problems whatsoever with hum. It would
be a poor piece of design which has high levels of nasties on an audio
ground.

--
*I didn't fight my way to the top of the food chain to be a vegetarian.

Dave Plowman London SW
To e-mail, change noise into sound.