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211A

Information - Help 
ID = 28954
       
Country:
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Tube type:  Transmitting Triode, air cooled   Power/Output 
Identical to 211A = CW-1818 = VT-4 = G_Western
First year 1921 Saga of the Vacuumtube, Tyne page 287, 288
Predecessor Tubes G_Western  
Successor Tubes 1924   242A   211D  

Was used by Transmittertube (Radio)
Filament Vf 10 Volts / If 3.2 Ampere / 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.

 
  211a_umg_1.png
  211A: Electrical Communication No.3 Vol.2 (Januar 1924)
Georg Richter
 
we_211a.jpg
211A: Electrical Communication No.3 Vol.2 (Januar 1924)
Georg Richter

 
vt4c_14.png
211A: Manufacturer's Literature
Emilio Ciardiello

 
211a_spec.png
211A: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector


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