2SC1971. A very good 1 watt fm transmitter circuit, very easy to build circuit. It has 4 transistors, one is a very stable oscillator, followed by a buffer stage to prevent frequency variation when ...

By varying the diode capacitance the L1 + diodes circuit makes a resonance circuit for ... BLY81, 2SC1970 or 2SC1971 if you want to have a pro fm transmitter with enough power to cover a long range ...