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2D21

Information - Help 
ID = 4224
       
Country:
Worldwide
Brand: Common type Worldwide tube/semicond.
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Thyratron 
Identical to 2D21 = PL21 = EN91 = ASG5121 = ST21_Thyratron = PL2D21 = 21TE31
Similar Tubes
Other class quality (otherwise equal):
  2D21W ; 5727 ; CV4018 ; CV797 ; PL5727
First Source (s)
29.Apr.1944 : Electron Tube Registration List 378
Predecessor Tubes 2051  

Base Miniatur-7-Pin-Base B7G, USA 1940 (Codex=Zk)
Filament Vf 6.3 Volts / If 0.6 Ampere / Indirect / Parallel, (AC/DC) /
Description Va <1350 pk inverse, <400 rms. Ia <0.5 peak. 0.1 average. Requires heater warm-up time >10s. 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
18 x 52 x mm / 0.71 x 2.05 x inch
Weight 8 g / 0.28 oz
Tube prices 0 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature

  2d21.png
  2D21: HP Archiv
Heinz Höger
 
d_valvo_2d21_pl21.jpg
2D21: TreLe
Trev Levick

 
2d21_sock.png
2D21: Telefunken Taschenbuch 1971
Anonymous 15 Collector

 
2d21_spec.png
2D21: Telefunken Taschenbuch 1971
Anonymous 15 Collector


Usage in Models 1= 1945?? ; 1= 1955?? ; 1= 1958?? ; 1= 1958 ; 2= 1959 ; 1= 1961? ; 1= 1965?? ; 1= 1966? ; 2= 1970??
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):11

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