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Information - Help 
ID = 4212
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Triode, vacuum   UHF 
Identical to 2C40 = CV2643 = GL-2C40
Similar Tubes
Normally replaceable-slightly different:
  2C40A ; CV687 ; EC560 ; HT301 ; REL34
Multiple differences or of other kind:
Predecessor Tubes GL-446A   446A  
Successor Tubes 4037  

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Ucc)
Filament Vf 6.3 Volts / If 0.75 Ampere / Indirect / Specified voltage AC/DC

Lighthouse planar triode. Usable as amplifier or oscillator up to 3.75GHz. Pulsed operation possible with 200W out.

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
33 x 65 x mm / 1.30 x 2.56 x inch
Weight 35 g / 1.23 oz
Tube prices 2 Tube prices (visible for members only)
Information source RCA Receiving Tube Manual RC-15   1962
Taschenbuch zum Röhren-Codex 1948/49   
Essential Characteristics, GE 1973
Tube Lore (I)

2C40: Telefunken Laborbuch Band 1
Heinz Höger

2c40_so.png 2C40: Telefunken, Spezialröhren 1962/63
Anonymous 10 Collector

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Just Qvigstad
2C40: Telefunken Taschenbuch 1971
Anonymous 15 Collector

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Usage in Models 2= 1956?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):2

Collection of



Forum contributions about this tube
Threads: 1 | Posts: 1
Hits: 1018     Replies: 0
Aufbau der Scheibentrioden 2C39A und 2C40
Franz Harder

In Heft 1 / 1957 der Zeitschrift Funkschau erschien ein interessanter Bericht über Entwicklung und Aufbau der Scheibentrioden 2C39A und 2C40 (Seiten 15...18 als PDF)

End of forum contributions about this tube

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