Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 14591
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

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 with this tube (valve, valves, valvola, valvole, válvula, lampe):23

Collection of

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



OM4 with tubular (straight) bulb

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]

Data Compliance More Information