File:Buttergr.jpg
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 | This image is ineligible for copyright and therefore is in the public domain, because it consists entirely of information that is common property and contains no original authorship. |
| Description |
Filter Response |
|---|---|
| Source |
Experimental Wireless page 536-541 |
| Date |
October 1930 |
| Author |
Stephen Butterworth 1885-1958 |
| Permission (Reusing this file) |
See below.
|
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:42, 1 December 2012 | | 700 × 613 (171 KB) | Dicklyon (talk | contribs) | better version from online paper, straightened |
| 23:36, 6 February 2010 |  | 400 × 350 (44 KB) | Trojancowboy (talk | contribs) | {{Information |Description = Filter Response |Source = Experimental Wireless page 536-541 |Date = October 1930 |Author = Stephen Butterworth |Permission = British Admiralty |other_versions = }} |
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