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L2/DD

Information - Help 
ID = 14402
       
Country:
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Tube type:  Double Diode-Triode   Audio Frequency 
Identical to L2/DD

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.1 Ampere / Direct / Battery =
Description

Gm=1.6mA/V. Ra=10k

 
Dimensions (WHD)
incl. pins / tip
45 x 117 x mm / 1.77 x 4.61 x inch
Information source Taschenbuch zum Röhren-Codex 1948/49   
History of the British Radio Valve to 1940   p. 181
- - Manufacturers Literature

128_3~~1.png L2/DD: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
l2dd.png
L2/DD: own collection
Peter den Boer

Usage in Models 4= 1934

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):4

Collection of

 
mazda_l2_dd.jpg

 

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