NBFM or Narrow Band Frequncy Modulation is used in this 27 MHz transmitter circuit schematic. This circuit is an application by Motorola MC2833 – VHF transmitter with FM modulation and narrow band in ...

Most radio circuits are tuned to pretty close tolerances and going from 27 MHz ... transmitter generates this frequency because it is easier to create an SSB signal at a fixed frequency. The ...