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TDD2A

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ID = 18419
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Developer: Mullard Radio Valve Co. Ltd.;  
Tube type:  Double Diode-Triode   Audio Frequency 
Identical to TDD2A
Similar Tubes
Normally replaceable-slightly different:
  BBC12 ; DT21 ; L2/D ; SS210DDT
First Source (s)
22.Nov.1935 : Wireless World (The), London (WW, 79)
Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Fp)
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.12 Ampere / Direct / Battery =
Description

Top Cap Grid. Metallised bulb only (1935)

 
Information source History of the British Radio Valve to 1940   p. 150 & 166
-- Original-techn. papers.   
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49
128_6.png TDD2A: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad 		tdd2a_techdat01.png
TDD2A: Mullard Valves 1936
Peter Hoddow
Usage in Models 1= 1934 ; 2= 1936? ; 2= 1936 ; 1= 1937?? ; 11= 1937 ; 1= 1938?? ; 16= 1938 ; 3= 1939? ; 14= 1939 ; 3= 1940
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):54

Collection of

Thomas Lebeth (A)
Tomasz Szczesniak (PL)
Frank Cuffe (IRL)
 
mullard_tdd2a.jpg

TDD2A
 
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