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Electronics

A McGraw-Hill Publication

Periodical   Volume 2Number 7July 1931

us_electronics_july_1931_titl.jpgus_electronics_july_1931_inh.jpg
created by: Achim Dassow (27.Nov.19) available by: Achim Dassow
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Some example tube pages for sets you can see there:

Vacuum Pentode PZ
Transmitter Triode, liquid- 507_DeForest
Screen-grid Tetrode 551 (1931)

  
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