Original file (688 × 866 pixels, file size: 155 KB, MIME type: image/png)
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
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 |
The following other wikis use this file: