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3D21A

Information - Help 
ID = 10555
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: Hytron; Salem (MA) 
Tube type:  Beam Power Tube   Text 
Identical to 3D21A = CV2659 = 5B/152D
Similar Tubes
Other shape (e.g. bulb type):
  3D21B
First Source (s)
30.Sep.1957 : Electron Tube Registration List 2017
Predecessor Tubes 3D21  
Successor Tubes 3D21B  

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Ucf) Top contact with a cap.
Filament Vf 6.3 Volts / If 1.7 Ampere / Indirect / Parallel, (AC/DC)
Description Centre-tapped heater. May also be operated at 12.6V 0.85A with the sections in series. Primarily designed as blocking oscillator, pulse modulator and deflection amplifier. Also used as high voltage series regulator.
ST-16 domed bulb. 
Dimensions (WHD)
incl. pins / tip
46 x 122 x mm / 1.81 x 4.80 x inch
Tube prices 2 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   
 
3d21aitt.jpg
3D21A
Aldo Patriarca

 
3d21a_sock.png
3D21A: Tabu Röhren-Codex, 1948
Anonymous 15 Collector

 
3d21a_1.png
3D21A: Manufacturer's Literature
Emilio Ciardiello


from Just Qvigstad


Documents about this component
  Manufacturer's Data Sheets 584 KB

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