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ID = 4218
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: Bell Labs; Murray Hill, NJ. 
Tube type:  Double Triode   VHF 
Identical to 2C51 = 396A = CV2831
Similar Tubes
Normally replaceable-slightly different:
  6CC42 ; 6Н3П
Other class quality (otherwise equal):
Heater different:
Multiple differences or of other kind:
First Source (s)
25.Nov.1946 : Electron Tube Registration List 542
Successor Tubes 5670  

Base Noval, B9A (Codex=No 41)
Filament Vf 6.3 Volts / If 0.35 Ampere / Indirect / Parallel, (AC/DC) /
Description VHF medium mu dual triode, usable up to 800MHz.
GE, Hytron, Sylvania, Tung-Sol, WE known manufacturers. 
Tube prices 1 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
Tube Lore, Sibley, USA 1996

2C51: Own collection
Kazimierz Jarosz

2C51: ARRL Handbook 1972
Michael Schlör


Usage in Models 1= 1950??

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):1

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