W
wafer (1) A thin layer of insulating material carrying switch contacts. Complex switches often consist of several wafers operated by a common control. (2) A thin slice of semiconductor material which, after treatment, becomes a multiplicity of planar transistors or of integrated circuits.
wafer loudspeaker (1) A moving-coil loudspeaker with very little depth designed for use in portable receivers or cars. The small depth is achieved by mounting the magnet within the conical diaphragm. (2) A piezo-electric tweeter with very little depth.
walkie-talkie A colloquial term for a portable transceiver.
water cooling Of a high-power electron tube a method of removing heat by pumping water through a jacket or tubing in direct contact with the external ...
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