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H21

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ID = 62453
       
 
   
Tube type:  Full-Wave Rectifier inert gas filled   Power-supply 
Identical to H21

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Industrial
Filament Direct
Description

Tungar bulb sold by Alsthom.
Source: Advertising in the magazine Vue special edition Radio September 14, 1932

 
Text in other languages (may differ)


Just Qvigstad
tungar_h21_vue_la_radio_14_septembre_1932_doc_s.png
H21: Publicité/advertising/Werbung 1932
Patrice Zeissloff

 
tungar_h21_vue_la_radio_14_septembre_1932_p01_s.jpg

 

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