“Who built all of this, Uncle? This machine?” “I did. After the war. Took me years.” “How does it work?” “It’s a radio transmitter. This switch here”—he guides her hand to it—“powers up the microphone, and this one runs the phonograph. Here’s the premodulation amplifier, and these are the vacuum tubes, and these are the coils. The antenna telescopes up along the chimney. Twelve meters. Can you feel the lever? Think of energy as a wave and the transmitter as sending out smooth cycles of those waves. Your voice creates a disruption in those cycles…”
