Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 18964
Brand: Funkwerk Erfurt, VEB, RFT (Ostd.) - vorm. Telefunken GmbH
Tube type:  Oscilloscope CRT, picture tube   Indication 
Identical to B4S1
Successor Tubes B4S2  

Base German Steel Y8A, 1938 Other combinations of connections.
Filament Vf 4 Volts / If 0.85 Ampere / Half indirect / Specified voltage AC/DC
Dimensions (WHD)
incl. pins / tip
43 x 138 x mm / 1.69 x 5.43 x inch
Weight 120 g / 4.23 oz
Information source
  B4S1: Internet
Siegfried Neumann
B4S1: eigenes Foto
Helmut Matysik

More ...
B4S1: RTB Funkwerk Erfurt 1956
Wolfgang Eckardt

More ...

from Just Qvigstad

Usage in Models 1= 1956 ; 1= 1958

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

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]