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ID = 32029
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: Hytron; Salem (MA) 
Tube type:  Beam Power Tube   beam power   Text 
Identical to 3D21B = CV5355
Similar Tubes
Other shape (e.g. bulb type):
Other class quality (otherwise equal):
First Source (s)
30.Sep.1957 : Electron Tube Registration List 2017
Predecessor 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.
Differs from 3D21A for the tubular T-12 bulb. 
Weight 60 g / 2.12 oz
Information source - - Manufacturers Literature   

sockel3d21b.png 3D21B: H.H.
Heinz Höger

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3D21B: H.H.
Heinz Höger

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