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Funktechnischer Vorwärts

Periodical   Volume 9Number 20October 1939

funktechnischer_vorwaerts_20_1939.jpg
created by: Franz Harder (23.Mrz.19) available by: Hannes Wurnitsch
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Some example tube pages for sets you can see there:

Triode-Beam Power Tube ECL11 (1939)

  
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