Am Radio Transmitter Circuit Diagram

Where resistors r1 and r2 are in ohms capacitor c1 is in microfarads and frequency f is in hertz. A block diagram representing various stages of a basic continuous wave radio transmitter. All general purpose transistors should work in this circuit you can use bc549 transistors for this circuit.

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Am Radio Circuit Diagram

A condenser microphone is used for speaking.

Am radio transmitter circuit diagram. These components can be used from an old mw radio if available. A simple am transmitter circuit with diagram and schematic. But it may increase the complexity of the circuit. This frequency can be changed by simply replacing r2 with a variable resistor or c1 with gang capacitors.

The tank circuit l1 and vc1 is tunable from about 500khz to 1600khz. The oscillator is built around q1 and associated components. 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. The tank circuit l1 and vc1 is tunable from about 500khz to 1600khz.

The audio output from condenser mic is preamplified by transistor t3 bc548. 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. Low range 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. Follows fcc regulations and still produces enough amplitude modulation. The circuit use a compact three transistor regenerative receiver with fixed feedback. Although the schematic looks somewhat complex the.

The circuit is in two halfs an audio amplifier and an rf oscillator. The picture to the left is a high quality radio transmitter for the a m. This is the simple and low cost am transmitter schematic diagram built using transistor bc109c. It is similar in principle to the zn414 radio.

Following the action in figure 6 the oscillator creates an ac sine wave at the desired frequency. This ircuit is deliberately limited in power output but will provide amplitude modulation am of voice over the medium wave band. It is illegal to operate a radio transmitter without a license in most countries. This am radio transmitter can transmit audio sound to your backyard.

The carrier wave is then amplified by the radio frequency rf power amplifier to the desired output wattage. 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. Notes it is illegal to operatea radio transmitter without a license in most countries.

Original am micropower transmitter. This is the circuit diagram of mini am radio receiver. This signal is called the carrier wave. The am radio transmitter does not use any modulator transformer.

The circuit is in two halfs an audio amplifier and an rf oscillator.