Rack and Noise and Fu

[Trem]

I gat a little hum (not static or white noise) when I face my guitar towards any of my amps within 3 foot or closer, as in when adjusting amp settings. But this is due to the pups being close to and facing the speakers.
Are there flourescant lights or any motors running where you're playing ?These are great at adding noise. Is your rack isolated ? Kinda sounds like a ground issue to me. Do you have any ground lift switches on any of your gear if so try that. Also...just because youre pluged into a 3 prong outlet doesn't mean it was wired and grounded correctly in the fist place!!! I have had to run 20 or 30 foot power cords many times at some of the bars I've played just to find a good or usually the "best" circuit to use.

Nope, there arent any flourecent lights or motors around, it's in a living room, i thought maybe the other gear/amps being around, or even my bass player suggested all our cell phones - haven't tried everything, have tried different sockets tho.
I also thought maybe my pickups, but had my other guitarist go near his furman, and the same thing happened. then i tried both of mine at home and the same - less extreme but happens, mostly it's amplified by the head which is turned up so it's comes off real loud and like a serious issue.
i flicked grounds all day - i wish the furman had one, heh.

it's just have to reveal itself by common denomination while paying attention to where and what's changed when or if it goes away i guess.

[Newc]

Guitar pickups are sensitive to RF interference. All electronic gizmos with a power supply generate RF interference. The grounding is there for the electrical requirements, not for the RF issues.
Do not ever stand near your amp or any other electrical appliance and expect it to be hum-free.

Also make sure you're using the little non-conductive washers on both sides of your rack (under the screw head in front of the rack unit, between the rack unit and the rail), and the housings of your racks are not touching each other.


And the impossible requirement: make sure signal cables never cross power cables.

I say impossible because rack makers cannot agree on a standard as to where to put their power plugs, not can they agree on where to put in/out jacks. The only thing they all agree on is that you should only use their brand for all your rack needs, and thus enjoy their internal standardization. That's an idiotic pipe-dream on their part, though.

[Trem]

cool thanks for that, yea i will take note of all those things you mentioned,
I do have spacers, but only on the outside so i will put some in between the unit and rail as well on each, and also make sure the units casings are not touching one another, if possible.
Could also be the wall warts plugged into it, maybe space them apart more or something, and my head is plugged into it, i'll try it all.
I didn't think i'm using it any different than any one else that's why i didn't make sense to me.

[Outlander]

I don't plug anything into the racks power system (furman) except for what's installed in the rack. All power cables are strapped together and bundled with velcro and routed down one side of the rack.
power supplies, wall warts and amps are into their own power strips.