File:Marconi 1897 spark gap transmitter.jpg
Marconi_1897_spark_gap_transmitter.jpg (429 × 286 pixels, file size: 27 KB, MIME type: image/jpeg)
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Date/Time | Dimensions | User | Comment | |
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current | 06:53, 5 March 2010 | 429 × 286 (27 KB) | Chetvorno | {{Information |Description={{en|Photo of early spark-gap transmitter used by Guglielmo Marconi during pioneering wireless telegraphy experiments at La Spezia in July 1897. It used a Righi type oscillator ''(left)''.}} |Source=Downloaded 2010-03-05 f |
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