high frequency intermittent noise

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.

@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.

I found this: http://blog.rfvenue.com/2015/05/06/how-to-prevent-cell-phones-from-interfering-with-audio-equipment

It talks about cell phone noise in a pro audio setting, and mostly with phones as the source of the noise, not a cell tower. But they do mention a way to get rid of the noise that hasn't been mentioned yet. It wouldn't be the best fix, but could at least let you see if it's coming through the RCA cables. Their fix: ferrite beads on the input cables, close to the end that plugs into the amp. The article recommends specific ferrite parameters to address cell phone noise..
If ferrites on your IC cables solve the problem, you could look at more heavily shielded ICs. If not, you're only out the cost of ferrites..

@toddverrone

That’s a great find. Let’s say I get ferrite beads in place. I still have tubes out in the open where the audio signal goes through as well. I think there is no escape...