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4C21

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ID = 39382
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Transmitting Triode, air cooled   Power/Output 
Identical to 4C21 = CV2576
Similar Tubes
Normally replaceable-slightly different:
  211-Spl ; 342B ; E403 ; FP124 ; GL285 ; VT-4C
Other class quality (otherwise equal):
  211
Base Jumbo 4-pin bayonet (1918)
Was used by Transmittertube (Radio)
Filament Vf 10 Volts / If 3.4 Ampere / Direct
Description

211 transmitting triode with low grid current limit.
Jumbo 4-pin base.

 
Dimensions (WHD)
incl. pins / tip		 x 200 x 58 mm / x 7.87 x 2.28 inch
Information source Tube Lore (I)   
Tube Lore (II)   p. 86
Babani, International Radio Tube Encyclopaedia
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
vt4c.png 4C21: Manufacturer's Literature
Emilio Ciardiello

Just Qvigstad 		4c21_characteristics.png
4C21: My schematic collection.
Pier Antonio Aluffi
 
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