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ID = 37462
Brand: Grammont (Radiofotos, Fotos); Paris, Malakoff
Tube type:  Dual-Grid Tetrode   Frequency converter 
Identical to TM4_Q
Similar Tubes
Normally replaceable-slightly different:
  E441_7pin ; I4053_7pin
Other base:

Base French Bigrille 7 pin (Q, B5+2)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere / Indirect / Specified voltage AC/DC
Dimensions (WHD)
incl. pins / tip
50 x 98 x mm / 1.97 x 3.86 x inch
Information source -- Collector info (Sammler)   

e441_7pin_1~~3.png TM4_Q: Philips
Wolfgang Holtmann

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