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ID = 5989
Tube type:  Double Triode   Audio Frequency 
Identical to 6113
Similar Tubes
Normally replaceable-slightly different:
  6SL7 ; 6SL7GT
Heater different:
First Source (s)
01.Aug.1951 : Electron Tube Registration List 1004

Base Octal (Int.Octal, IO) K8A, USA 1935
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC

Low-microphonic twin triode. Gain 70, Gm 1600 umhos.

Information source Essential Characteristics, GE 1973   
Röhren-Taschen-Tabelle, (Franzis RTT)   
6113: RTT Schwandt
Günther Stabe † 19.8.20

6113: Babani 1951-1954
Patrice Zeissloff

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