In this tutorial, we are demonstrating a project of a “high power FM transmitter”. As in previous articles, I have seen numerous 0.5 W and 1 W FM transmitter circuits. However, I never found any powerful FM transmitter with some limited low-cost segments and easy to assemble. So here is a circuit of FM transmitter which has a few segments and easy to make. This is an incredible FM transmitter and its yield is between 0.5 watts to 2 watts relies upon the input voltage which is 6 to 30 V DC.
Hardware Component
The hardware components required to make high power FM transmitter are listed below:
| S.no | Component | Value | Qty |
|---|---|---|---|
| 1. | Battery | 12 V | 1 |
| 2. | Variable Capacitor | 2-10 pF | 1 |
| 3. | Transistor | BC547 | 1 |
| 4. | Transistor | 2N2219 | 1 |
| 5. | Variable Resistor | 27 K | 1 |
| 6. | Capacitor | 330 pF, 40 µF 25 V, 4.7 pF, 1 nF | 2, 1, 1, 1 |
| 7. | Resistor | 330 K, 5 K, 10 K, 100 K | 1, 1, 2, 1 |
| 8. | Mic | – | 1 |
| 9. | Coil | 6 turns of 22 measure enameled wire | 1 |
Circuit Diagram
Circuit Operation
In this section, we are talking about the circuit operation of the “high power FM transmitter”. In this circuit, we are using a few low cost and easily available components. The trimmer is equivalent to 2 – 10 pF and L is equivalent to 6 turns of 22 measure enameled wire twisted on 3/26-inch structure. The 2N2219 is a high output RF transistor and it will deplete progressively current so it is encouraged to utilize basic battery or utilize a lead-corrosive battery. The transistor 2N2219 ought to be mount with a heatsink. For good execution, mount the circuit in a metal box and keep all the leads of the segments as short as could be expected under the circumstances.
Applications and Uses
The high-power FM transmitter is used in various applications like
- RF Amplifiers for Radio
- TV
- Scientific, Medical
- Industrial
- Military
