Tuesday, August 30, 2016

Circuit Diagram Long Range FM Transmitter using Transistor

Robotronicdiagram. - This is Circuit Diagram Long Range FM Transmitter using Transistor like in Figure 1 below. The main component in this circuit diagram is transistor and other components. In here we will show you also the component parts used and the simple description of this circuit diagram and the last we will give you link to read more about this circuit from original source. 

Circuit Diagram 

Component Part
  1. Condenser Mic
  2. Transformer
  3. Capacitors
  4. Resistors
  5. Varicap Diode
  6. Diodes
  7. Transistors
  8. Variable Capacitor
  9. Inductor
Description

Circuit diagram like in figure 1 above is Circuit Diagram Long Range FM Transmitter using Transistor. According ElectronicZone site describe that the power output of most of these circuits are very low because no power amplifier stages were incorporated.

The transmitter circuit described here has an extra RF power amplifier stage, after the oscillator stage, to raise the power output to 200-250 milliwatts. With a good matching 50-ohm ground plane antenna or multi-element Yagi antenna, this transmitter can provide reasonably good signal strength up to a distance of about 2 kilometres.

The circuit built around transistor T1 (BF494) is a basic low-power variable-frequency VHF oscillator. A varicap diode circuit is included to change the frequency of the transmitter and to provide frequency modulation by audio signals. The output of the oscillator is about 50 milliwatts. Transistor T2 (2N3866) forms a VHF-class A power amplifier. It boosts the oscillator signals? power four to five times. Thus, 200-250 milliwatts of power is generated at the collector of transistor T2.

Please read more this article from original source about Circuit Diagram Long Range FM Transmitter using Transistor using link Here.


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