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OM4

Information - Help 
ID = 14591
       
Country:
Great Britain (UK)
Brand: Cossor, A.C.; London
Tube type:  Double Diode-Triode   Audio Frequency 
Identical to OM4 = CV1055 = CV352 = AR21 = ZA3497 = DH147 = EBC33
First Source (s)
1937 : History of the British Radio Valve to 1940 p.181

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uf) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.2 Ampere / Indirect / Specified voltage AND current AC/DC
Description

The picture shown here confirms that Cossor also sourced tubes from the Mullard/Philips group.

 
Tube prices 1 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   

337_11.png OM4: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
Usage in Models 1= 1945 ; 1= 1946?? ; 4= 1946 ; 2= 1947?? ; 2= 1947? ; 3= 1947 ; 5= 1948 ; 1= 1949 ; 3= 1950 ; 1= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):23

Collection of

Collection of a member from D
Collection of a member from FIN
Collection of a member from D
 
om4cossorph1s.jpg

OM4
 

Variants

OM4 with tubular (straight) bulb


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