Posted by chupa38 on
URL: https://www.es-forum.com/Why-does-my-RF-meter-show-the-same-readings-even-if-I-surround-it-with-aluminium-foil-tp4036801p4036815.html

I have heard that if its not grounded aluminum can act like a antennae. Not an expert. Also I think you have to be careful about which side of the aluminum is facing out (shiny smooth side) against what your blocking otherwise again it acts more like a antennae.