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311A

Information - Help 
ID = 34906
       
Country:
United States of America (USA)
Brand: Western Electric Company Inc.; New York (NY)
Tube type:  Vacuum Pentode 
Identical to 311A = S311A
Similar Tubes
Normally replaceable-slightly different:
  311B
Heater different:
  329A_WE

Base UY-Base, 5 Pins (USA, April 1927) Top contact with a cap
Filament Vf 10 Volts / If 0.64 Ampere / Indirect / Parallel, (AC/DC)
Description

Receiving pentode; 2W power output class A with 135V, 30mA. Sibley also gives a 'B' variant, unknown differences.
Also NEC and STC production reported by Sibley.

 
Literature Tube Lore   
- - Manufacturers Literature   
 
311ap1s.jpg
311A
Patrice Zeissloff

 
311a_329a_data1.png
311A: own collection
Peter den Boer



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