Am Radio Transmitter Circuit Diagram

This signal is called the carrier wave.

Am radio transmitter circuit diagram. The oscillator is built around q1 and associated components. The transmitter legally operates with micro power and will not set any distance records but unlike simpler designs the frequency stays put and the fidelity is excellent. Low range am radio transmitter circuit diagram. All general purpose transistors should work in this circuit you can use bc549 transistors for this circuit.

A simple am transmitter circuit with diagram and schematic. This ircuit is deliberately limited in power output but will provide amplitude modulation am of voice over the medium wave band. The oscillator is built around q1 and associated components. The tank circuit l1 and vc1 is tunable from about 500khz to 1600khz.

These components can be used from an old mw radio if available. A condenser microphone is used for speaking. This circuit is deliberately limited in power output but will provide amplitude modulation am of voice over the range 500khz to 1600khz with values shown. Although the schematic looks somewhat complex the.

Notes it is illegal to operatea radio transmitter without a license in most countries. The picture to the left is a high quality radio transmitter for the a m. A block diagram representing various stages of a basic continuous wave radio transmitter. But it may increase the complexity of the circuit.

Where resistors r1 and r2 are in ohms capacitor c1 is in microfarads and frequency f is in hertz. The circuit use a compact three transistor regenerative receiver with fixed feedback. The circuit is in two halfs an audio amplifier and an rf oscillator. The am radio transmitter does not use any modulator transformer.

The circuit is in two halfs an audio amplifier and an rf oscillator. It is illegal to operate a radio transmitter without a license in most countries. This is the circuit diagram of mini am radio receiver. The tank circuit l1 and vc1 is tunable from about 500khz to 1600khz.

It is similar in principle to the zn414 radio. The audio output from t3 is further amplified by transistor t2 bd139 which modulates the rf amplifier built around transistor t1 by varying the current through it in accordance with the audio signal. Following the action in figure 6 the oscillator creates an ac sine wave at the desired frequency. The audio output from condenser mic is preamplified by transistor t3 bc548.

This is the simple and low cost am transmitter schematic diagram built using transistor bc109c. The circuit is in two halfs an audio amplifier and an rf oscillator. Original am micropower transmitter. This is the simple and low cost am transmitter schematic diagram built using transistor bc109c.

The carrier wave is then amplified by the radio frequency rf power amplifier to the desired output wattage.