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ID = 19121
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Mag. Eye, 4 shadow angles   Indication 
Identical to 4677 = AM1
Similar Tubes
Heater different:
  4678 ; EM1
First Source (s)
May.1936 : Philips Bulletin # D 36
Successor Tubes 1936   AM1  

Base Europe side contact P8A (Au P, 8SC)
Filament Vf 4 Volts / If 0.3 Ampere / Indirect / Specified voltage AC/DC

4677 was the preliminary designation for the AM1, before letter "M" was assigned for indicator tubes. Babani as well as "Franzis Röhren-Taschen-Tabellen" erroneusly state AM2 as an equivalent.

Text in other languages (may differ)

42_2.png 4677: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad
Usage in Models 5= 1936

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):5

Collection of



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