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ID = 6601
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Tube type:  Signal Diode - one single system   Detector 
Identical to D42
Similar Tubes
Normally replaceable-slightly different:
  D43 ; E748
Other class quality (otherwise equal):
First year 1936 The Saga of Marconi Osram Valve
Predecessor Tubes E748  

Base Europe 4-Pin (A, 4A, B4, since 1914) (Codex=E)
Filament Vf 4 Volts / If 0.6 Ampere / Indirect / Parallel, (AC/DC)
Literature Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   
D42: M.N.
Michael Niermann

D42: Telefunken Werkstattbuch
Wolfgang Bauer


Usage in Models 3= 1936 ; 1= 1937 ; 1= 1938? ; 2= 1938 ; 3= 1939

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):10

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