Text: Solid state, in electronic parlance, is not a voting pattern but another way of saying "transistorized." It means that the equipment in question has no tubes (which contain a vacuum), and that its circuits use transistors and semiconductor diodes, which are solid throughout. A semiconductor, by the way, is a type of material that, electrically speaking, is neither fish or fowl. There are a number of these materials, halfway between conductors and insulators, and they are the stuff of which transistors are made of.

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