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VALVE AMPLIFIER AND OSCILLATOR CIRCUITS
SIMPLE EXPERIMENTS AT HIGH FREQUENCY
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A.C. mains accumulator adjusted aerial alternating current ammeter amplifier amplitude anode circuit anode current anode load anode voltage applied arrangement audio-frequency Avometer calculated calibration capacitance cathode charge choke circuit is shown components connected constant control grid curve deflexion diode direction effect Experiment filament fixed frequency galvanometer give grid bias grid current grid voltage H.T. battery H.T. supply H.T. voltage heterodyne increased input instrument kc/s lamp lead loop magnetic field maximum measured Metal Rectifier meter milliammeter modulation mutual characteristics mutual conductance negative neon lamp observed obtained Ohm's Law oscillograph Osram output voltage parallel phase plates plotted pole positive potential divider R.F. oscillator radio ratio reactance rectifier resistance resonance rheostat screen voltage secondary shown in Fig signal solenoid suitable switch taken tance tapping terminals tetrode triode tuned circuit tuned-anode turns valve voltmeter variable air condenser volts waveform wavemeter wire