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Electronics

A McGraw-Hill Publication

Periodical   Volume 2Number 5May 1931

us_electronics_may_1931_titl.jpgus_electronics_may_1931_inh.jpg
created by: Achim Dassow (25.Nov.19) available by: Achim Dassow
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Some example tube pages for sets you can see there:

Electrometer Tetrode or FP54
Triode, vacuum 112A
Screen-grid Tetrode 451_deForest

  
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