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3D21

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ID = 56539
       
 
   
Tube type:  Beam Power Tube   Text 
Identical to 3D21
First Source (s)
25.May.1945 : Electron Tube Registration List 408
Predecessor Tubes D21_Hytron  
Successor Tubes 3D21A  

Base Octal (Int.Octal, IO) K8A, USA 1935 Top contact with a cap.
Filament Vf 12.6 Volts / If 0.85 Ampere / Indirect
Description Beam power tube intended to operate as blocking oscillator for pulse modulators up to 20KW. May also be used as deflection amplifier. Specially designed to utilize high-volume materials and production techniques, typical of receiving tubes.
Centre-tapped heater; may be operated at 6.3V, 1.7A. 15W plate dissipation. 
Dimensions (WHD)
incl. pins / tip
46 x 122 x mm / 1.81 x 4.80 x inch
Information source - - Manufacturers Literature   
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3d21a.png 3D21: Manufacturer's Literature
Emilio Ciardiello


Just Qvigstad
3d21_1.png
3D21: Manufacturer's Literature
Emilio Ciardiello

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