Stresses the importance of frequency stability and introduces the crystal controlled oscillator as a possible device used to obtain this stability. Explains the piezoelectric effect of a crystal, lists types of crystals having the piezoelectric effect, and points out the relationship between crystal thickness and frequency. Various crystal cuts are explained and shown graphically. The q of the crystal circuit is explained, and both the physical dimensions and electrical characteristics of a typical crystal are discussed.
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KRO Brandpunt Radio Controledienst opsporing radiopiraten 1983
In de vroege jaren '80, in een tijd waar de radio het belangrijkste medium was voor nieuws en entertainment, was er een felle strijd...
