20 Feb
2009
20 Feb
'09
5:52 a.m.
On Wed, 18 Feb 2009 04:04:57 +0000
pete shorthose <zenadsl6252(a)zen.co.uk> wrote:
On Tue, 17 Feb 2009 21:02:02 -0500
carmen <_(a)whats-your.name> wrote:
I have an approximate radial setup but the mixer would be the hub. Thing is and as I
said, I've tried to
use some of these things in isolation. (only the zoom H4 or only the mixer, both have
integral monitoring so
no need for an amp or pc) but I still see it. (well, hear it)
Problem solved I think. I tried using someone's Dell XPS laptop (almost identical to
my 9400) and the problems
disappeared. Indeed, noise levels dropped vs using the devices in isolation. The
difference? The 9400 has
a 3 core earthed AC adaptor and non of my other gear is earthed at all. After googling
around I also discovered
that this is why I've been getting electric shocks from the metal parts on my 9400 so
hopefully I can get an earthed
AC adapter for this laptop.
pete .
It may
just be that it took the introduction of better quality gear for me to hear the effects
above the usual
din but then these static like snapping noises are very distinct.
the suggested ground topology is a star or radial shape,
path to ground from each device is never thru another device, and potentials are as
similar as possible do you have a metal radiator pipe? or barring
that a 3 prong wiring?
Ah, moved the radiator recently. I could run a cable tho.
are you using 2-pronged gear or 3? it may be that
your house ground is not properly grounded (bad)
well AFAIK, the house is grounded and being in the UK the sockets are all 3 pronged. that
said, I'm pretty sure
that non of them use the 3rd prong. (plastic tab instead of a metal prong or 2 core flat
cables)
or strong induced currents from close 60hz mains
cabling (perhaps even 120v is enough at a close distance)
i use alligator-clipp terminated cables, to grip onto the metal box around a USB port,
then hook that to the negative battery terminal of my amp. then tap this wire and connect
to the radiator pipe
(shuts shit up pretty good).........
Cool, ty. I'll try a few things. I'll also say goodbye now in case I'm found
dead tomorrow with a spectacular new
hairstyle.