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ID = 6600
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Developer: MO Valve Co. Ltd.; GB 
Tube type:  Double Diode   Detector 
  Ca. 1925 up to 1945 rare.
Identical to D41 = VT127_GPO
Similar Tubes
Normally replaceable-slightly different:
  2D4A ; CV1170 ; CV1187 ; SD
Multiple differences or of other kind:
First year 1935 The Saga of Marconi Osram Valve

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Fc)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.3 Ampere / Indirect / Specified voltage AC/DC

Tube designed as a combined detector and automatic volume control. Available in clear or metallised bulb.

Dimensions (WHD)
incl. pins / tip
33 x 88 x mm / 1.30 x 3.46 x inch
Weight 30 g / 1.06 oz
Information source History of the British Radio Valve to 1940   p. 139 & 177
- - Manufacturers Literature   1936-37 MOV catalog
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49

125_5.png D41: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad
Usage in Models 7= 1935 ; 2= 1936? ; 27= 1936 ; 8= 1937 ; 2= 1938

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):46

Collection of



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