. The Bell System technical journal . A B C Fig. —Equivalent fepresentations of crystal and oscillator circuit vious sections. The frequency equation has been derived by Reichfrom the differential equation for the current in the loop. It is / + Ro 1P LcCt and the condition for oscillation is shown to be \Ctp\ S () () We shall consider the crystal connected between the grid and cathode of the tube, in which case Zt is the input impedance of the vacuum tube. 1 17 ... The expression for ^ was developed by Chaffee from which it is possibleZt to determine the circuit conditions neces

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. The Bell System technical journal . A B C Fig. —Equivalent fepresentations of crystal and oscillator circuit vious sections. The frequency equation has been derived by Reichfrom the differential equation for the current in the loop. It is / + Ro 1P LcCt and the condition for oscillation is shown to be \Ctp\ S () () We shall consider the crystal connected between the grid and cathode of the tube, in which case Zt is the input impedance of the vacuum tube. 1 17 ... The expression for ^ was developed by Chaffee from which it is possibleZt to determine the circuit conditions necessary for the input resistance andreactance to be negative. The effect of the circuit variables upon the abso-lute values of p and Ci determines their effect upon the frequency and activityaccording to equations () and (). Input Admittance or the Vacuum TubeWith the assumption that the grid current is negligible and the statictube capacitances Cp and Cg are part of the external circuit, Chaffeesequation for input c

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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1