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B255

Information - Help 
ID = 2469
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Screen-grid Tetrode   RF/IF-Stage   Controlling (mu) 
  Ca. 1925 up to 1945 rare.
Identical to B255 = S2 = TB452
Similar Tubes
Normally replaceable-slightly different:
  K40N
Other base:
  B255_UX4
First year 1932 Tube leaflet collection E.Erb Analysis by original leaflets

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Er) Top contact screw type.
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.18 Ampere / Direct / Battery =
Description

This tube is a variable mu type.

 
Information source - - Manufacturers Literature   
Babani, International Radio Tube Encyclopaedia   p. 52 & 53
Taschenbuch zum Röhren-Codex 1948/49
Taschenbuch zum Röhren-Codex 1948/49

3_3.png B255: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad
b255_spec.png
B255: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

More ...
Usage in Models 6= 1934 ; 1= 1935? ; 3= 1935 ; 1= 1936

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):11

Collection of

 
b255_philips.jpg

B255
 

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