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F_M_WIRELESS_MIKE

2016-11-10 09:51  
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F_M_WIRELESS_MIKE
Oscillator. modulator using single tunnel diode produces 35-kc frequency deviation per my of modulating signal at 90 Mc. When fed by dynamic mike, range is up to 100 feet. If pre-emphasis is desired, diode 1N34A may be replaced by R1-C1 circuit shown in dotted lines, having time constant of 75 microsec.-W. Ko, Tunnel Diode F.M Wireless Microphone, Electronics, 33:47, p 93-95.