Physics 123 - AM Radio

First useful circuit from the Harvard Physics 123 course I am taking this semester — a famed course taught by the authors of the cult textbook “The Art of Electronics.”

• Take AM radio signal from a wire antenna, and build a circuit that filters the signal and feeds into an audio amplifier.
• Carrier frequency: 1MHz
• Sound/music signal frequency: 2K - 20KHz

Fellow Media Labber Noah Feehan and I made this pretty fast, probably in 30 minutes.

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The schematic:

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The circuit seen from the oscilloscope:

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[Video] In action:

Physics 123 - AM Radio from fatti_k on Vimeo.