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211A

Information - Aide 
ID = 28954
       
Pays:
Etats-Unis
Fabricant: Western Electric Company Inc.; New York (NY)
Concepteur: Western Electric Company Inc.; New York (NY) 
Type:  Transmitting Triode, air cooled   Power/Output 
Identique à 211A = CW-1818 = VT-4 = G_Western
Similaires
Remplaçants avec petites différences :
  211 ; CV25 ; VT-4A
Première série 1921 Saga of the Vacuum Tube, Tyne page 287, 288
Prédécesseurs G_Western  
Successeurs 1924   242A   211D  
Culot Jumbo 4-pin bayonet (1918)
Utilisé par Transmittertube (Radio)
Chauffage Vf 10 Volt / If 3.2 Ampère / Direct
Description

According to Tyne, for this tube five selections of filament voltages were available for operation from constant voltage sources: a suffix from A to E was etched on the glass after the serial number. The filament selection was no longer required in the successor tube, the 211D, introduced in the mid 1924.
4-pin jumbo base.

 
Bibliographie Saga of the Vacuum Tube, Tyne   p. 287 & 288
Tube Lore (II)   p. 234
211a_umg_1.png
211A: Electrical Communication No.3 Vol.2 (Januar 1924)
Georg Richter
vt4c_14.png 211A: Manufacturer's Literature
Emilio Ciardiello

Just Qvigstad 		211a_spec.png
211A: Banneitz, TB der drahtl. Teleph. 1927
Anonyme 15 Collectionneur

Collection de

Robert Gillespie (USA)
 
we_211a.jpg

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