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Marconi's Parabolic Transmitter, by Guglielmo Marconi, England, c. 1896
Inventory Number: 53586
Number of documents: 3
Document Type: Label
Document Heading: Science Museum Caption
Text:
An early Science Museum caption describes these reflectors as probably those used by Marconi to demonstrate to representatives of the Post Office and the Armed Service on Salisbury Plain in 1896.
Document Type: Miscellaneous Note
Document Heading: Historical Background
Text:
Multiple Oscillators were invented by Heinrich Hertz, and later improved by Augusto Righi. The improved versions were often referred to as 'Righi Oscillators'. Righi was a Professor at the University of Bologna, an expert on Hertzian waves, and a family friend of the Marconi family. Righi first made Marconi aware of Hertzian waves, and Marconi used a Righi Oscillator in his earliest experiments.
Document Type: Miscellaneous Note
Document Heading: Technical Details
Text:
When a high voltage is applied to the oscillator, a discharge takes place across the two outer spark-gaps, but then transfers to the central spark-gap which causes very short Hertzian waves to be radiated.
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