AM Radio Transmitter Components

Brendan's picture

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Joined: Feb 27, 2020

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AM Radio Transmitter Components
February 27, 2020 - 4:33am

Hello good people,

 

Sorry if this doesn't below in General but I have no idea where it belongs lol

 

I'm an absolute novice with electronics but I'm trying to make an AM radio transmitter for a uni project (I study electronic music). I've seen a lot of examples of people building it, and I plan to use the same circuit that they have - A power supply, an audio input, an audio transformer and an oscillator chip.

I want to get a 1 mHz quartz oscillator, but I'm not sure if there are any factors other than the frequency?

also, I have no idea what transformer to get. I know the main purpose of it is to combine the audio signal with the carrier frequency but I don't know if while ratio thing will matter in my application.

Please let me know ASAP!!

Thank you :)

jaksonlee's picture

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Joined: Nov 07, 2019

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We have many posts on FM
April 27, 2020 - 1:12pm

We have many posts on FM transmitters, so we decided to make one on AM transmitter. AM transmitters create radio waves using Amplitude Modulation.
In electronics and telecommunications a transmitter or radio transmitter is an electronic device which produces radio waves with an antenna. The transmitter itself generates a radio frequency alternating current, which is applied to the antenna. When excited by this alternating current, the antenna radiates radio waves.
Transmitters are necessary component parts of all electronic devices that communicate by radio, such as radio and television broadcasting stations, cell phones, walkie-talkies, wireless computer networks, Bluetooth enabled devices, garage door openers, two-way radios in aircraft, ships, spacecraft, radar sets and navigational beacons. The term transmitter is usually limited to equipment that generates radio waves for communication purposes; or radiolocation, such as radar and navigational transmitters. Generators of radio waves for heating or industrial purposes, such as microwave ovens or diathermy equipment, are not usually called transmitters, even though they often have similar circuits.
A transmitter can be a separate piece of electronic equipment, or an electrical circuit within another electronic device. A transmitter and a receiver combined in one unit is called a transceiver. The term transmitter is often abbreviated "XMTR" or "TX" in technical documents. The purpose of most transmitters is radio communication of information over a distance. The information is provided to the transmitter in the form of an electronic signal, such as an audio (sound) signal from a microphone, a video (TV) signal from a video camera, or in wireless networking devices, a digital signal from a computer.

Sourav Gupta's picture

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Joined: Feb 12, 2018

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Find out the transformer first.
April 29, 2020 - 9:00am

Find out the transformer first, the oscillation will depend on the transformer.