![Photo shows the transmitter and studio of the first radio broadcasting station in Minnesota, which broadcast market and weather reports and musical programs using the call letters 9XI, Minneapolis, MN, 1920. (Photo Photo shows the transmitter and studio of the first radio broadcasting station in Minnesota, which broadcast market and weather reports and musical programs using the call letters 9XI, Minneapolis, MN, 1920. (Photo](https://cdn.superstock.com/1899/Comp/1899-18552421.webp)
Photo shows the transmitter and studio of the first radio broadcasting station in Minnesota, which broadcast market and weather reports and musical programs using the call letters 9XI, Minneapolis, MN, 1920. (Photo
![In 1879 Heinrich Hertz invented the first radio transmitter that used sparks to generate electromagnetic waves. Today this… | Toilet paper holder, Spark, Inventions In 1879 Heinrich Hertz invented the first radio transmitter that used sparks to generate electromagnetic waves. Today this… | Toilet paper holder, Spark, Inventions](https://i.pinimg.com/originals/c7/93/3f/c7933f0bfb587ac845b6d96b5f4ef587.jpg)
In 1879 Heinrich Hertz invented the first radio transmitter that used sparks to generate electromagnetic waves. Today this… | Toilet paper holder, Spark, Inventions
![Transmitter of Guglielmo Marconi with which he made his first radio experiments. The wire winding on the wooden frame is the coil, the glass bottle, a so-called "Leyden Jar" the capacitor Stock Transmitter of Guglielmo Marconi with which he made his first radio experiments. The wire winding on the wooden frame is the coil, the glass bottle, a so-called "Leyden Jar" the capacitor Stock](https://c8.alamy.com/comp/TA2916/transmitter-of-guglielmo-marconi-with-which-he-made-his-first-radio-experiments-the-wire-winding-on-the-wooden-frame-is-the-coil-the-glass-bottle-a-so-called-leyden-jar-the-capacitor-TA2916.jpg)
Transmitter of Guglielmo Marconi with which he made his first radio experiments. The wire winding on the wooden frame is the coil, the glass bottle, a so-called "Leyden Jar" the capacitor Stock
![Heinrich Hertz invented the first radio transmitter and receiver – Historical articles and illustrationsHistorical articles and illustrations | Look and Learn Heinrich Hertz invented the first radio transmitter and receiver – Historical articles and illustrationsHistorical articles and illustrations | Look and Learn](https://www.lookandlearn.com/history-images/preview/LLB/LLB8006/LLB8006-058-03.jpg)