One thought on “Early Hackers Used Whistles From Cap’n Crunch Cereal Boxes”

  1. Yep, John “Cap’n Crunch” Draper was one clever guy. Do you know what frequency the Cap’n crunch whistle produced? 2600 hertz….

    This tone would allow you to make a charge-free call anywhere. This was known as “Phreaking”. It became popular among the electronic-curious types (hackers). The magazine “2600: The Hacker Quarterly” was quite popular during these times.

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