Yes, concrete and brick, 14" thick barrier wall. I’m in a concrete box basically with brick on the outside.
I did not ground the aluminum foil the first try. I will try again.
I did not ground the aluminum foil the first try. I will try again.
high frequency intermittent noise
... the frequency my stereo is picking up is in the 700 - 800MHz range.James, check out this link: https://www.fcc.gov/general/700-mhz-public-safety-spectrum-0 The band extending from 698 to 806 MHz is used by public safety services, with part of it also apparently being used in some locations for cellphone or other mobile device communications. Hope that helps. Regards, -- Al |
@almarg Terrific find. That would explain why some days it’s quiet, and other days it’s busy. Early mornings 4am to about 11am it’s quiet most days. And it goes on late into the evenings. Yesterday it was very busy all day long. I also used the Hf35c Rf Analyzer to walk around my apartment with all the power turned off, to find quiet zones, unfortunately I do not have much flexibility in my room arrangement for the system. It’s called living in a shoebox. I’m not too bad off, the noise is a low level noise, just-at-the-natural-noise-floor of the room. Its traffic outside, people, cars, bikes, skateboarders, road construction, building construction, air planes above, I hear quite a bit. I have a police station down the street, and a fire station a block down, so I hear a lot of sirens, which may also contribute to the public safety band Al had mentioned above. So between the subway, the cops, and the firemen, my stereo should keep me in the loop. |