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ID = 49688
Brand: Stal; (brand)
Tube type:  Triode, vacuum   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to A3_Stal

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Filament Vf 2 Volts / If 0.22 Ampere / Direct / Battery =
Description Amplification factor 8.3, internal resistance 6250 Ohm, slope 1,33 mA/V 
Dimensions (WHD)
incl. pins / tip
48 x 1123 x mm / 1.89 x 44.21 x inch
Weight 51 g / 1.80 oz
Information source
A3_Stal: own collection
Peter den Boer

A3_Stal: own collection
Peter den Boer

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