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The Oscillograph in Use
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a.c. voltage actual afterglow alternative amplitude anode circuit anode current anode voltage arrangement base beam brilliance capacitance cathode cathode-ray tube Chapter characteristic condenser connected constant cycle deflecting coils deflection amplifier deflector plates discharge distortion effect electrons electrostatic ellipse examination feedback fly-back frequency modulator gain gas relay grid bias h.t. supply harmonic illustrated in Fig increased input leak linear magnetic deflection magnetic field mains frequency method move mumetal necessary negative non-linearity normal obtained operation oscillation oscillograph oscilloscope output voltage pattern peak pentode phase angle phase shift photographic portion positive possible potential potentiometer practice produce proportional radio radio frequency radio-frequency rapid reactance resistance resonance curve ripple scan screen sensitivity shown in Fig shows sine wave speed suitable sweep synchronism time-base trace transient triode usually valve vary vertical deflection voltage applied voltage developed volts waveform zero