Four Stage FM Transmitter Circuit

Here's the circuit diagram of a four RF stage FM transmitter. The stages are, very high frequency (VHF) oscillator built around a HF transistor BF494, a pre- amplifier built around transistor BF200, a driver transistor 2N2219 and a power amplifier using 2N3866.

Circuit Diagram of  4 Stage FM Transmitter: Click  to enlarge

For complete explanation about this FM transmitter circuit, Download this document.

Note :

• This FM transmitter is only meant for educational purposes. The outdoor use is illegal.
• Assemble the circuit on a general purpose PCB and arrange the antenna without any disruption for getting the maximum range.
• Use a heat sink for transistor 3866.

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