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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 ; SS210DDT

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Fp)
Filament Vf 2 Volts / If 0.12 Ampere / Direct / Battery =
Description Top Cap Grid. Metallised bulb only (1935) 
Information source Taschenbuch zum Röhren-Codex 1948/49   
-- Original-techn. papers.   
 
mullard_tdd2a.jpg
TDD2A: TDD2A
Frank Cuffe

 
128_6.png
TDD2A: Telefunken Werkstattbuch
Wolfgang Bauer

 
tdd2a_techdat01.png
TDD2A: Mullard Valves 1936
Peter Hoddow


from Just Qvigstad

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


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