. Operation of the modulator tube in radio telephone sets . Fig. 7.—Modulation of resonance circuit from the armature. The resonance load upon the radio generatoris the parallel system L, C, R tuned to the frequency correspondingto the speed of rotation of the generator Gr- 1. POWER RELATIONS IN RESONANCE SYSTEMS DURING MODDXATION With the key of Fig. 7 depressed, the actual wave form of currentthrough condenser C of the resonance system may be approxi-mately as shown in Fig. 8, which may be described as a radiofrequency cmrent with amplitude pulsating at an audio frequencyrate. For the purpos
. Operation of the modulator tube in radio telephone sets . Fig. 7.—Modulation of resonance circuit from the armature. The resonance load upon the radio generatoris the parallel system L, C, R tuned to the frequency correspondingto the speed of rotation of the generator Gr- 1. POWER RELATIONS IN RESONANCE SYSTEMS DURING MODDXATION With the key of Fig. 7 depressed, the actual wave form of currentthrough condenser C of the resonance system may be approxi-mately as shown in Fig. 8, which may be described as a radiofrequency cmrent with amplitude pulsating at an audio frequencyrate. For the purpose of discussing the phenomena from powerconsiderations, imagine the instruments e, i, 4 of Fig. 7 to recordroot mean square values sufficiently rapidly to follow accuratelyan audio current, but not a radio current. Thus the instrument4 will follow the audio variations in the antenna current, as shownby the trace 4 of Fig. 8. Similarly instruments i and e will follow 394 Scientific Papers of the Bureau of Standards {Vol. 17 the variations in the input ra
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