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ID = 50966
Great Britain (UK)
Brand: Ekco, E.K.Cole Ltd.; Southend-on-Sea
Tube type:  Double Diode-Triode   RF/IF-Stage 
Identical to DTU1
Similar Tubes
Normally replaceable-slightly different:
  DDT13 ; HAD ; TDD13C

Base British-7-Pin, old (M7A) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 13 Volts / If 0.2 Ampere / Indirect / Specified voltage AND current AC/DC
Information source Wireless World (The), London (WW, 79)   

Just Qvigstad
Usage in Models 1= 1937

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):1

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