"Don Pearce" wrote in message
...
On Thu, 16 Mar 2006 10:39:13 +0200, "Iain Churches"
wrote:


"Glenn Richards" wrote in message
t.uk...
Just a quick straw poll...

What are people's opinions of mains filters, upgraded power cables etc?

Have been doing some investigation and there may actually be something
in
this. Not talking Russ Andrews style £250 mains cables here, more like
sticking a plug with a filter onto a standard IEC lead, and possibly
using
one of those Masterplug RFI filtered 4-way blocks.

Has anyone done any serious experimentation on this? I did hear a quite
convincing demonstration at the Sound & Vision show in Bristol a few
years
ago, but the mains there is probably a lot dirtier than your typical
home
installation.

What myself and a few others have figured out is that the level of RFI
introduced onto your ring main by something like the switching PSU in a
typical PC is quite high.

Opinions, people?


Hello Glenn. A couple of days ago, I popped in for 30 secs to
an audio demo at a local dealership to take him some audition
material. He was demonstrating a mains filter unit. He had a
tunable RF gadget with a small inbuilt speaker which he plugged
into a wall socket. Radio transmissions and very loud hash could
clearly be heard. Then he plugged the gadget into one of the
filtered outlets. Silence.


It had a filter in it - what would you expect? This has nothing
whatever to do with audio noise.

The unit was about 4U in height, and had ten mains outlets
on the rear panel.

I was there for only a few seconds, (car parked on a yellow
line) The dealer has promised me some literature.

Regards to all
Iain



Don't be conned; there is no need.

d

Hi Don. I have a feeling you are right. In many years of large
recording sessions, with hundreds of cables and interconnects
I have never seen a mains filter unit in use.

When I get the literature about the mains filter perhaps we can
discuss this further. Glenn's post is IMO and interesting one.
If there is a ghost to be laid to rest here, thsis is a good time
and a good place to do it.

Iain