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ID = 29229
Great Britain (UK)
Developer: Mullard Radio Valve Co. Ltd.;  
Tube type:  Vacuum Pentode   Audio Frequency 
Identical to CV358 = OM5B = VT201_GPO = 5A/157D = EF37A
Similar Tubes
Other class quality (otherwise equal):
  CV1056 ; EF37 ; OM5
Other characteristic (electr. data):

Base Octal (Int.Octal, IO) K8A, USA 1935 Top contact with a cap.
Filament Vf 6.3 Volts / If 0.2 Ampere / Indirect / Specified voltage AND current AC/DC
Description Low hum and low microphony version of the EF37 and OM5.
Typically Va=250, Vg2=100, -Vg1=2. Ia=3mA, gm=1.8mA/V. 
Dimensions (WHD)
incl. pins / tip
32 x 100 x mm / 1.26 x 3.94 x inch
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   

oc10_1~~1.png CV358: RTT 1974 (Franzis) 13. Auflage
Martin Renz

Just Qvigstad

Collection of

Collection of a member from FIN
Collection of a member from D


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