File:Amplifying Receiver, Sketch 1 from the April 1916 QST.png
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 02:06, 22 August 2009 | 771 × 691 (11 KB) | Sagsaw | {{Information |Description={{en|1=Sketch 1 from the article "Amplifying Receivers with Mica Diaphragms" published in the April 1916 issue of QST.}} |Source=April 1916 QST Page 75. thumb|page=12 |Author=Thomas Appleby |Date=1 |
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