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 15, 2017
james1969 OP Details Discussions Posts This discussion Message User 347 posts 11-15-2017 at 08:09pm Copy Comment URL Report Comment Edit Delete The Furman P-2400 IT has no affect on the noise. @jea48 I do not have a radio that is AC powered. I will look into the RCA shorting plugs. I think this is an air borne issue - cell tower...
james1969 OP Details Discussions Posts This discussion Message User 347 posts 11-15-2017 at 09:59pm Copy Comment URL Report Comment Edit Delete I put the PS Audio Noise Harvesters on the Furman P-2400 IT to see if they would stop blinking, they did not. And when I turned on my light on a dimmer in the kitchen (different circuit), the PSNHs went crazy. So does the Furman even do anything to filter noise? The noise floor in the music has been lowered. There is benefit sonically in the music though.
Post removed Nov 15, 2017
james1969 OP Details Discussions Posts This discussion Message User 347 posts 11-15-2017 at 11:19pm Copy Comment URL Report Comment Edit Delete @jea48 No headphone output on my preamp. I just dug out my pro-audio monitor too, plugged it into a different circuit and could hear the noise, though not as loud, and nothing was plugged into the monitor either, it was simply plugged into the wall.