In article , Glenn Richards
writes
Jim Lesurf wrote:

You presumably were aware thoughout of what arrangement was in use. You
also seem to have only done this a few times, not many times to form
abody of data on which any meaningful statistical analysis could be
carried out.

We didn't worry about setting up a blind test at this stage, as my
concern was simply to find out whether there was a difference,
perceived, psychological, whatever.

Ah!, If your after the feel good factor going to church on Sundays or an
old s/hand bible might achieve that!.....

From my point of view I'm satisfied with the results. Using an RFI
filtered 4-way strip in combination with a generic filtered IEC lead
will get rid of the RF hash on the mains supply, and thereby lower the
noise floor (and improve dynamics). These bits can be had at trade price
for about £8 for the 4-way block, and less than a fiver for a bare-ended
IEC cable and a filtered 13A plug. Use the two together and it's just as
effective as an Isotek cable (£60).

When you have the amount of PC hardware on your ring main as I do (WinXP
and NetBSD workstations in the dining room/office, 10 servers in the
attic, RISC PC in one bedroom, A3020 in another bedroom, plus a couple
of laptops, then all the Ethernet switches, wireless access point etc
all spewing RF onto the mains) then decent RFI filtering on the mains
does make a difference. And even if you're living out in the middle of
nowhere, with no PCs or SMPSUs for miles, it's worth having a surge
protected strip anyway.

Quick question - in the event of a lightning strike, what would you
rather have fried? £8 worth of surge protected mains distribution block,
or £1,000 worth of amplifier?

O dear!, in the advent of a lightning strike make sure your insurance
covers your gear!....

Course going to church on Sunday might appease the almighty so your
protected!.....

Bit of a no-brainer really, that one.

Yep.. no brains at all.....


--
Tony Sayer