Category:300B

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300B 
Directly-heated audio frequency power triode
300B base and outline.svg
Геометрические размеры и цоколёвка[1][2]
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Instance oftriode,
product
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Start time1938
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300B (en); 300B (pl); 300B (de); 300B (ru) Directly-heated audio frequency power triode (en); Мощный низкочастотный триод прямого накала (ru) WE300B (en); WE300B (ru)

Although the 300B was launched in 1938, it was merely a re-based 300A which was made since 1933

Media in category "300B"

The following 17 files are in this category, out of 17 total.