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B228

Information - Help 
ID = 1775
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Triode, vacuum   Universal 
  Ca. 1925 up to 1945 rare.
Identical to B228 = H210 = B2_Lissen = B2_Zenith = HL2_Tungsram = HL2_MOV
Similar Tubes
Normally replaceable-slightly different:
  A2
Other characteristic (electr. data):
  VT107_TKD
Other base:
  B228_UX4
First year 1931 -- Schematic
First Source (s)
1931 : Overzicht v.de toe te p PHILIPS Modell 830B u.a.

Base Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eo)
Filament Vf 2 Volts / If 0.1 Ampere / Direct / Battery =
Literature - - Manufacturers Literature   
Taschenbuch zum Röhren-Codex 1948/49   
 
b228_01.jpg
B228: Collection TL
Thomas Lebeth

 
1_13.png
B228: Telefunken Werkstattbuch
Wolfgang Bauer

 
b228_spec.png
B228: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector


Usage in Models 2= 1931 ; 1= 1933 ; 4= 1934 ; 1= 1935? ; 5= 1935 ; 5= 1936 ; 5= 1937 ; 1= 1939

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):24


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