File:Powerful spark gap transmitter.png
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 09:41, 3 May 2021 | 688 × 866 (155 KB) | Materialscientist | FFT | |
08:28, 23 March 2010 | 688 × 866 (165 KB) | Chetvorno | {{Information |Description={{en|The tuned circuit of a powerful spark-gap radio transmitter in Australia, from a 1921 book on wireless telegraphy. The small horizontal cylinders mounted in front are spark gaps. The nar |
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