high frequency intermittent noise

I have a noise issue that is intermittent. Here is what the noise sounds like:

https://clyp.it/4b233bmm

Here is what I know so far:

The sound affects all components and is compounded if all components are turned on. I have turned off my preamp, phono preamp, leaving just my mono blocks on, and the noise still appears.
I have turned off everything and unplugged everything in the house including my dimmer switch, and the noise still appears.
I have a pair of pro-audio monitors, self powered with class AB amps, and when I plug those into the same outlet, I hear the same noise coming through the pro-audio monitor. So this rules out my big system.
The noise is primarily during the day and goes into the evenings, weekends too, early mornings it does not appear.
I live in a pre-war mid-rise building. I have no ground, I'm using a Nordost QKore grounding system. This did reduce the noise floor quite a bit, but has no affect on this intermittent noise.
I have a cell phone tower directly across the street from my building in Manhattan.
Looking at a real time analyzer, I see peak at 2kHz when the noise appears.

james196911-12-2017 2:30am

Post removed Nov 14, 2017
Post removed Nov 14, 2017
jea48 Details Discussions Posts This discussion Message User 2,944 posts 11-14-2017 at 10:02pm Copy Comment URL Report Comment Edit Delete @kosst_amojan, If the RF signal is being radiated through the air why didn't the battery AM radio pick up the signal? Wrong frequency range? What type of receiver meter device could be used to pick up the signal and identify the frequency?
jea48 Details Discussions Posts This discussion Message User 2,944 posts 11-14-2017 at 10:11pm Copy Comment URL Report Comment Edit Delete Faraday cage is the next logical step, if the power is clean and the Furman has no affect on the noise. I've found some copper mesh curtains I can put up behind my system, which would create a barrier. That won't work. Them RF signals are sneaky. They will just go around the screen.
james1969 OP Details Discussions Posts This discussion Message User 345 posts 11-14-2017 at 10:18pm Copy Comment URL Report Comment Edit Delete I didn't think so, but that is as far as my research went. Glad I stopped there.