Am Radio Transmitter Circuit Diagram

Where resistors r1 and r2 are in ohms capacitor c1 is in microfarads and frequency f is in hertz.

Am radio transmitter circuit diagram. It is illegal to operate a radio transmitter without a license in most countries. The audio output from condenser mic is preamplified by transistor t3 bc548. The circuit is in two halfs an audio amplifier and an rf oscillator. The oscillator is built around q1 and associated components.

All general purpose transistors should work in this circuit you can use bc549 transistors for this circuit. The oscillator is built around q1 and associated components. This is the circuit diagram of mini am radio receiver. Following the action in figure 6 the oscillator creates an ac sine wave at the desired frequency.

A simple am transmitter circuit with diagram and schematic. This is the simple and low cost am transmitter schematic diagram built using transistor bc109c. The picture to the left is a high quality radio transmitter for the a m. A condenser microphone is used for speaking.

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. These components can be used from an old mw radio if available. The am radio transmitter does not use any modulator transformer. This ircuit is deliberately limited in power output but will provide amplitude modulation am of voice over the medium wave band.

Low range am radio transmitter circuit diagram. A block diagram representing various stages of a basic continuous wave radio transmitter. 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. 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. The circuit is in two halfs an audio amplifier and an rf oscillator. This frequency can be changed by simply replacing r2 with a variable resistor or c1 with gang capacitors. But it may increase the complexity of the circuit.

The tank circuit l1 and vc1 is tunable from about 500khz to 1600khz. Follows fcc regulations and still produces enough amplitude modulation. This am radio transmitter can transmit audio sound to your backyard. This signal is called the carrier wave.

The tank circuit l1 and vc1 is tunable from about 500khz to 1600khz. Although the schematic looks somewhat complex the. This is the simple and low cost am transmitter schematic diagram built using transistor bc109c. 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.

It is similar in principle to the zn414 radio.