DescriptionAmplifying Receiver, Sketch 2 from the April 1916 QST.png
English: Sketch 2 from the article "Amplifying Receivers with Mica Diaphragms" published in the April 1916 issue of QST.
Date
Source
April 1916 QST Page 75.
Author
Thomas Appleby
Licensing
Public domainPublic domainfalsefalse
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{{Information |Description={{en|1=Sketch 2 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