The Instructograph: The Paper-Tape Teacher The Instructograph taught Morse from punched paper tape at any speed a student could survive. This guide covers the machine and its long classroom career. Quick facts Maker Chicago, USA Medium punched paper tape Speed control mechanical, variable Curriculum tape libraries Users schools + military Before electronics could generate practice, mechanics did: a motor pulled coded tape past contacts, clicking a sounder or keying a tone at a speed set by gears. Generations of operators learned from its patient, identical repetitions. Visit the site: https://morsecodeworks.com/ Morse Code Works - free Morse code tools and guides. Reference chart