Free Images: "bestof:Transmitter tank coil.jpg spark-gap radio transmitter around 1918 The spark gap and capacitor were connected with clips to the bottom primary coil to make a"
Sendemast Hirschlanden.jpg
Guglielmo_Marconi_1901_wireless_signal.jpg
Tesla coil circuit.svg
Design_Analysis_of_the_Boeing_B-17G_Flying_Fortress.png
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Design_Analysis_of_the_P-38_Lightning.png
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Design_Analysis_of_the_F6F-5_Hellcat.png
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1896_Marconi_patent.gif
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Hertz_spark_gap_transmitter_and_parabolic_antenna.png
Oudin_coil_Fleming.png
Early_Lecher_line.png
Brockhaus-Efron Oscillation 1.jpg
Popov1.jpg
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Elihu Thomson's Tesla coil circuit Feb 1892 rotated.png
Elihu Thomson's Tesla coil circuit Feb 1892.png
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Sparktrans.png
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The Marconi Company transmitter at Poldhu, Cornwall, 1901.jpg
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Stamp_US_spark_coil.jpg
1 inch spark coil for amateur wireless transmitters, c. 1908 - Bennington Museum - Bennington, VT - DSC08639.JPG
Marconi transmitter.png
Löschfunkenstrecke 1.JPG
Progress in Electronics 6c 1973 issue U.S. stamp.jpg
Poulsen's_first_arc_converter.jpg
Tuned circuit animation 3 300ms.gif
Tuned circuit animation 3 400ms.gif
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KBRC antenna tower.jpg
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KBRC AM radio antenna tower.JPG
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Trideco.png
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US Army Signal Corps airplane radio telegraph transmitter, Type BC-15A, made by Connecticut Telephone and Electric Co, 1918 - National World War I Museum - Kansas City, MO - DSC07722.JPG
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AmateurRadioTransmitter.JPG
Szikraado.PNG
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SL§ Warning Sign.JPG
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