marconi
Spark-gap transmitter - Wikipedia
File:Rotary spark gap transmitter.jpg - Wikimedia Commons
low power spark gap transmitter typical of the period. | Energía, Electromagnetismo
File:Spark gap transmitter.jpg - Wikimedia Commons
1916 One Mile Transmitter | OneTubeRadio.com
Spark-gap transmitter - Wikiwand
C. 1905 Marconi Spark Gap Transmitter - TechnoGallerie
History of Radio
How Spark Transmitters Work
File:Hertz spark radio transmitter 1887.png - Wikimedia Commons
File:Inductively coupled spark gap transmitter circuit.svg - Wikimedia Commons
History of Radio
An example of the spark gap transmitters I have built over the years--Not for Sale | Spark gap, Radio design, Electronic circuit projects
File:Inductively coupled spark gap transmitter circuit.svg - Wikimedia Commons
.jpg "Carndonagh Amaterr Radio Club")
Carndonagh Amaterr Radio Club
1: (a) Scheme of Hertz experimental set-up ; (b) Nikola Tesla's... | Download Scientific Diagram
Shortwave spark transmitter
Spark-gap transmitter - Wikipedia
VE7CNF - A Spark Gap Transmitter with a Pure Note
Spark Gap Transmitter - YouTube
SPARK GAP TRANSMITTERS
Spark-gap transmitter - Wikipedia
What does the spark-gap do in a spark-gap transmitter? - Amateur Radio Stack Exchange
High Current Transformer: Spark-gap transmitter
