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Reception of Frequency Modulation
The R F Stage
4 other sections not shown
adjusted aerial circuit aerial inductor amplitude modulation anode circuit anode impedance anode load audio output band bandwidth broadcast receiver cable carrier frequency carrier vector cathode cathode-ray oscillograph centre tap coil connected crystal oscillator D.C. voltage decreases diode example feedback Figure FM broadcasting FM detector FM receiver FM reception frequency changer frequency modulation gain give given grid circuit grid leak I.F. frequency I.F. signal I.F. transformers increased inductance input circuit input impedance input resistance input signal kc/s limiter stage low-frequency mA/V maximum Mc/s modulating current modulating frequency modulation index mutual conductance negative noise obtained oscillator voltage oscillograph output voltage pentode pentode valve phase detector primary produce quency R.F. amplifier R.F. stage radiation ratio detector reactance reduced resistor response curve secondary seen sidebands signal-to-noise ratio suitable switch take place transmitter triode tuned circuit tuning capacitor usually valve grid voltage applied windings wobbulator