Thread: Radionic Regen
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Old 2nd Feb 2019, 9:05 pm   #20
Radio Wrangler
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Location: Fife, Scotland, UK.
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Default Re: Radionic Regen

Silvered glass will stop electric fields, but it's useless at magnetic fields in the RF range.
To screen mag fields you either need conductive metal thicker than the skin-depth at that frequency or else you need a ferromagnetic material. Normal aluminium boxes are thick enough to screen RF, but at the lower frequencies of mains fields, the thickness needed (skin depth is frequency dependent and conductivity dependent) would be impractical, so CRT screens are usually made out of good magnetic 'conductors' like mumetal.

THere is a snag to mumetal on CRTs... it can get permanently magnetised, just from getting a knock and being in the Earth's magnetic field, od from being worked. So you need to thermally anneal them after manufacture before they can be used.

David
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