Heinrich Hertz invented the first radio transmitter and receiver – Historical articles and illustrationsHistorical articles and illustrations | Look and Learn
Spark-gap transmitter - Open Tesla Research
history - When was the first radio transceiver (transmitter/receiver) built, and by whom? - Amateur Radio Stack Exchange
Milestones:Poulsen-Arc Radio Transmitter, 1902 - Engineering and Technology History Wiki
Pin de Andonis Gavalas em Antiques | Rádio, Radioamador, Eletrônica
Early 1920th telegram vacuum tube radio transmitter Stock Photo - Alamy
Early radio transmitter hi-res stock photography and images - Alamy
US Navy Pre-War Radio Transmitters
The World's First Factory-Built Transmitters ‹ SPARKY's Blog
Transmitter, Spark, Oscar Roesen, 1911 McCurdy Early Airplane Radio Experiment | National Air and Space Museum
Marconi's first radio broadcast made 125 years ago - BBC News
Transmitter - Wikipedia
Broadcast Transmitter Development
File:Antique radio transmitter (replica).jpg - Wikimedia Commons
Broadcast Transmitter Development
Sept. 29, 1920: Radio Goes Commercial | WIRED
Spark-gap transmitter - Wikipedia
Early radio: transmission and reception, 1900 - 1914
Transmitter - Wikipedia
Spark Transmitter - Engineering and Technology History Wiki
Howeth: Chapter XXI (1963)
Constructing the First “Real” Radio Station - Radio World
File:Marconi's first radio transmitter.jpg - Wikimedia Commons
EARLY RADIO MUSEUM - TELEGRAPH & SCI INSTRUMENT MUSEUMS
Early Radio Transmitter
It all started as a lab experiment: A century ago, the broadcaster that became OPB was born - OPB
Early radio transmitter hi-res stock photography and images - Alamy
