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B405

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ID = 2744
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Triode, vacuum   Power/Output 
Identical to B405 = RE124 = LL25 = A25 = DP4 = DU412 = DV27/4 = L4 = L414 = L415 = M54 = U412 = V62 = H_Adzam = P3 = P425 = CL975 = P414 = DX502 = CL104 = TB06 = 2-405
Similar Tubes
Normally replaceable-slightly different:
  420LL ; 4B5_Ultron ; 4BFF ; BFF ; C303B ; C306B ; C_Adzam ; D05/4 ; D5 ; D94 ; G405 ; L44 ; LX414 ; OX45 ; P415 ; R77 ; SP4_Triotron ; TMBF2 ; TMD ; V82
Other base:
  B405_UX
First year 1927 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
1925 : Saga of the Vacuumtube, Tyne p.421

Base Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.15 Ampere / Direct / Parallel, (AC/DC)
Tube prices 1 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
 
e415_c1.jpeg
B405: From my collection.
Niclas Pettersson

 
1_15.png
B405: Telefunken Werkstattbuch
Wolfgang Bauer

 
daten_b405_philips.png
B405: Philips Verstärkerröhren
Gerhard Heigl


Usage in Models 1= 1925 ; 1= 1926? ; 2= 1926 ; 2= 1927?? ; 3= 1927? ; 17= 1927 ; 3= 1928?? ; 8= 1928? ; 19= 1928 ; 3= 1929?? ; 5= 1929? ; 38= 1929 ; 1= 1930?? ; 3= 1930? ; 15= 1930 ; 3= 1931 ; 3= 1932 ; 2= 1933 ; 1= 1934 ; 1= 1935

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):131


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