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Read this: AM Radio: No Longer Practical? — Radio: The Golden Days and The Future — Medium

Summary: http// The problem is, however, that more and more electronic devices emit various type of noises on the same frequency spectrum which is used for the AM radio, from the power suppies. Modern power supplies use the technology called switching voltage regulation the power supply acts as a high-frequency automatic switch to control the energy flowing into itself,and sends the energy to the devices. The output voltage is controlled by the ratio of the periods of turning the switch on and off. -

Read full article: link icon  AM Radio: No Longer Practical? — Radio…

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