Firebottle N.obs. A Large, Primitive, Power-hungry Active Electrical Device, Similar In Function To A FET But Constructed Out Of Glass, Metal, And Vacuum.

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firebottle n.obs.

A large, primitive, power-hungry active
electrical device, similar in function to a FET but constructed out
of glass, metal, and vacuum. Characterized by high cost, low
density, low reliability, high-temperature operation, and high
power dissipation. Sometimes mistakenly called a `tube' in the
U.S. or a `valve' in England; another hackish term is
glassfet.

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