What Esteban means is if you are in the location of a buried metal object with a strong signal, and you are trying to detect it by using an antenna connected to an IC with an open gate, then then the amount of energy being sensed will be strong enough to cause a current overload in the IC, causing it to permanently malfunction, possibly accompanied by the smell of a burning IC. He says he knows this from his own field experience.
Fet is very delicate. As I can't measure this strong signal of treasure, I put the antenna at 10 centimeters of TV screen and fet again kaputt! I repeat with other circuit based on array transistors CA3046, and again kaputt! So, wich is the nature of treasure buried for long time for to causes total malfunction in IC when input is exposed or semiexposed via an antenna?
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