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
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... 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 |