Let me preface this by saying I don't know if Joey's problem is exactly like mine, and if I'm starting to threadcrap, please let me know. But Notuern's comment about the electric fence really started to make sense to me. In my case, my noisy studio is much closer to my neighbor's property than my 'noiseless' living room. So if it was something like an electric fence (in this case for a dog, and not a cow) something like that could clearly be the problem, at least in my situation. And one other thing that I was thinking, is that maybe Joey's studio is close to the point where the actual electrical feed comes into his house? Maybe the proximity of the main electrical line could have something to do with it also? I'm FAR from an electrician, so this might not even make sense, but throughout all of my troubleshooting, and time wasted looking for ground loops, replacing breakers, replacing cables, shutting down power to my entire house, and the fact that our noises are both centered at 7500hz, I'm hoping that I can save Joey some of the time and headache that drove me nuts for the past few years (and is starting to drive me nuts again, thanks to this thread!!).
Bobby
And one other thing that I was thinking, is that maybe Joey's studio is close to the point where the actual electrical feed comes into his house? Maybe the proximity of the main electrical line could have something to do with it also?
alright guys
it has nothing to do with physically connected AC electricity
tested every room in my house with a laptop and firebox, running on battery power, and got the tone consistently in every single room
what next?
I assume you tested with the mains power off?
Take the laptop outside and test to see if the signal is higher on a particular side of the house. That might give you some idea of what direction it is coming from.
didnt test with the power off
figured i didnt need to on the notion that the laptop is running off of battery power.
No. That only eliminates the AC>DC step down transformer. Highly unlikely to be that. The interference you are getting is airborne for want of a better term, turning of the mains to the build will either eliminate that the source is coming from inside the building or not. If the building power is off and you still get the signal then you know its coming from somewhere else. At this stage you really want it to disappear with the main off because at least then you have an opportunity to track it down and fix it.
i vote this idea
Glad someone got it
I can see Joey's control room encased in chicken wire or tin foil. This would help him on his studio atmosphere, a good contrast to the wood paneling. It would definitely be more metal. m/