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What is Simple Crystal-Controlled AM Transmitter about?

This document summarizes a simple crystal-controlled AM transmitter circuit that can be built for under $10 using common components. The circuit uses a crystal oscillator with an LM386 audio amplifier and two transistors to transmit audio from an electret microphone on either 6.4MHz or 7.2MHz, selected by a DIP switch. With 100% modulation, the transmitter output is 40mW but can peak up to 160mW. Construction details are provided for a single-sided PCB layout along with a parts list and testing instructions

Author

Joy Mukherji

Language

EN