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3S28

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ID = 61967
       
Country:
Sweden
Brand: Standard Radiofabrik A.B.; Ulvsunda
Tube type:  Triode, vacuum   Audio Frequency 
  Ca. 1925 up to 1945 very rare. ***
Identical to 3S28 = 4608

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928
Was used by Telephony
Filament Vf 4 Volts / If 1 Ampere / Indirect / Specified voltage AC/DC
Information source - - Manufacturers Literature   September 1950

4608.png 3S28: Fin Stewart
Fin Stewart


Just Qvigstad
 

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