Originally Posted by
mac72
Quoted from Wikipedia:
Faraday cages cannot block static or slowly varying magnetic fields, such as the Earth's magnetic field (a compass will still work inside). To a large degree, though, they shield the interior from external electromagnetic radiation if the conductor is thick enough and any holes are significantly smaller than the wavelength of the radiation. For example, certain computer forensic test procedures of electronic systems that require an environment free of electromagnetic interference can be carried out within a screened room. These rooms are spaces that are completely enclosed by one or more layers of a fine metal mesh or perforated sheet metal. The metal layers are grounded to dissipate any electric currents generated from external or internal electromagnetic fields, and thus they block a large amount of the electromagnetic interference
I stand by what I said
For proper screening against mains hum a SUT really needs mumetal or permalloy. Expensive stuff but not to the extent to double or more the price of a SUT!
Last edited by Arkless Electronics; 10-01-2017 at 17:57.
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