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ID = 14888
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Double Diode-Triode   Audio Frequency 
Identical to TDD13C
Similar Tubes
Normally replaceable-slightly different:
Other characteristic (electr. data):
First Source (s)
22.Nov.1935 : Wireless World (The), London (WW, 79)

Base British-7-Pin, old (M7A) (Codex=Nb)
Was used by Radio/TV-reception etc.
Filament Vf 13 Volts / If 0.2 Ampere / Indirect / Specified voltage AND current AC/DC

Metallised bulb only (Mullard 1935 data)

Information source History of the British Radio Valve to 1940   p. 150 & 179
Babani, International Radio Tube Encyclopaedia   p. 146 & 147
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Taschenbuch zum Röhren-Codex 1948/49

154_6.png TDD13C: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad
TDD13C: Mullard Valves 1936
Peter Hoddow

Usage in Models 2= 1935? ; 1= 1936?? ; 4= 1936? ; 1= 1936 ; 1= 1937? ; 7= 1937 ; 5= 1938 ; 1= 1939 ; 1= 1940

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

Collection of



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