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Electronics

A McGraw-Hill Publication

Periodical   Volume 1Number 9December 1930

us_electronics_december_1930_titl.jpg
created by: Achim Dassow (23.Nov.19) available by: Achim Dassow
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Some example tube pages for sets you can see there:

Triode, vacuum 112
Screen-grid Tetrode 222 (1927)

  

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