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ID = 18965
Brand: Funkwerk Erfurt, VEB, RFT (Ostd.) - vorm. Telefunken GmbH
Tube type:  Oscilloscope CRT, picture tube 
Identical to B4S2
Predecessor Tubes B4S1  

Base German Steel Y8A, 1938 Other combinations of connections.
Filament Vf 4 Volts / If 0.7 Ampere / Indirect / Specified voltage AC/DC
Dimensions (WHD)
incl. pins / tip
45 x 142 x mm / 1.77 x 5.59 x inch
Tube prices 5 Tube prices (visible for members only)
Information source

oszi_b4s2.gif B4S2: RFT RTB Spezialröhren 1961
Wolfgang Eckardt

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Just Qvigstad
B4S2: RFT-Spezialröhren 1965
Anonymous 15 Collector

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Usage in Models 1= 1958 ; 1= 1968?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):2

Collection of



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