I know a guy who moved into a new condo. Plugged in his guitar and got tones of interference. No other audio devices except the guitar are getting interference (which makes sense), it's not a hum/ground loop... When he's moving around, it alters the interference.
He found out he's living next to a mobile phone service provider.
Thanks for all the recommendations. so besides shielding cables and the guitar pickup area, there's no device or method to redirect interference for a whole room. Instead of bieng just instrument specific.
The interference is more of a buzzing, not so much radio or cell converstation. But it's not a hum or components buzz.
I've had this problem in many different places I've lived. Often, it's been times when I've got some high gain pedal on, or when I had my old crappy wah that was like an antenna. It used to pick up religious broadcasts on AM. It was awesome.
Having shielded and properly grounded components obviously goes a long way to help with this. Sometimes when a vehicle passes by that has a boosted radio (illegal or not), this can creep into your signal as well. One town I lived in, my stereo used to pick up this one cop car. It would come right through the loudspeakers, even when all the components were off!
I'm not sure about what I'd do with a cell phone service provider next door. Go to humbuckers most likely.
On a slightly tangential note, I had a set of the DiMarzio Virtual Vintage pickups in one of my strat style guitars, which was supposed to sound just like a vintage pickup, or something like that. They worked as advertised, they were definitely less sensitive to interference, but they had this really, really high pitch thing going on that would make my ears hurt after ~40-45 mins of playing or so. Swapped em out for a set of Fralins, which were noisier, but sounded to my ears more than twice as good and non fatiguing. I'm sure there are tons of people that have had much success with the stacked single coil designs, though. FWIW.
lining cavities/pickups with copper foil does the trick. You can buy it at stewmac cheap. Sometimes cable tv or a satalite dish can cause problems if not for the 1,000,000 other things. Things like a 60h hum from a refrigerator motor, electric furnace etc...
Isolation transformer will usually solve the problem cost you like $100-150. Copper foil works for me though. Pain in the butt but worth the effort. An other option which sucks, are active pickups. no hum. The new EMG passive pickups are super quiet though. Ironically the pickups that are the noisiest are seymours? and they sound the best tone wise? go figure. you can't win
Are you sure it's the git-ar? could be a bad cable or a non shielded wire in the guitar