![]() The BBC story is worth a read to give a little background. This is not the usual Hackaday fare, but we know our readers are fascinated by all new technologies and will provide plenty of speculation as to how it might work in the comments. He doesn’t open it up, leaving us to expect that whatever mystical component deals with the RF must be concealed within it. Of more interest is the copper cylinder, which he identifies as a short piece of copper water pipe with two end caps. The active part of the device is simply a battery powering an LED through a switch, as he puts it the device is a £50 ($61) poor quality torch (flashlight). There is a copper cylinder with a coil of wire round it, though the wires from the coil to the battery have been cut. Opening the battery compartment reveals a standard 9 V alkaline cell, but the real interest comes when the cover is removed. What he has is a plastic project box with a graphic on top, a switch and green LED on the side, and a battery compartment on its rear. This set writing, because as part of his probing into the world of snake-oil, he’s bought just such a unit and subjected it to a teardown. As part of an investigation into opposition to 5G mobile phone networks in the English town of Glastonbury the BBC reporter shared details of a so-called 5G protection device that was advertised as casting a bubble of 5G-free space around its owner.
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