. Practical wireless telegraphy; a complete text book for students of radio communication . VACUUM VALVE GENERATORFig. 293—^The Vacuum Valve Heterodyne Receiver. RECEIVERS FOR UNDAMPED OSCILLATIONS OR WAVES. 281 different frequency of oscillation, a beat current is set up in the secondary circuit, which isamplihed in the local telephone circuit by the charge placed upon the grid. As explained by Armstrong, the incoming oscillations are transferred from the antennacircuit to the secondary circuit in the usual manner, and due to the repeating action of thevalve, they are reproduced in the tertia
. Practical wireless telegraphy; a complete text book for students of radio communication . VACUUM VALVE GENERATORFig. 293—^The Vacuum Valve Heterodyne Receiver. RECEIVERS FOR UNDAMPED OSCILLATIONS OR WAVES. 281 different frequency of oscillation, a beat current is set up in the secondary circuit, which isamplihed in the local telephone circuit by the charge placed upon the grid. As explained by Armstrong, the incoming oscillations are transferred from the antennacircuit to the secondary circuit in the usual manner, and due to the repeating action of thevalve, they are reproduced in the tertiary circuit, coupled back to the secondary circuitthrough the coupling transformer, L-5 and L-6, and re-enforced, all this taking place whilethe valve is generating oscillations locally. Simultaneously, beats are produced by theinteraction of the local oscillations and the incoming oscillations, the effect being to alter-nately increase and decrease the amplitude of the oscillations in the complete Beat Receiver for Damped and UndampedOscillations. Va/\/e Defechr
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
