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Definition of "Keying Relays" |
Relays used in radio transmitters where the ordinary hand key cannot accommodate the plate current without excessive arcing. [Manufacturers of Relays] / In transmitters using a crystal-controlled oscillator, the keying is almost always in a circuit stage following the oscillator. In large transmitters,75 watts or higher, the ordinary hand key cannot accommodate the plate current without excessive arcing. / Injection laser or diode laser, is a semiconductor device that produces coherent radiation in which the waves are all at the same frequency and phase in the visible or infrared spectrum when current passes through it. Laser diodes are used in optical fiber systems, compact disc players, laser printers, remote-control devices, and intrusion detection systems. |
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