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ID = 21918
Brand: Werk für Fernmeldewesen (OSW, HF, WF) Berlin, VEB, RFT (Ostd.)
Developer: Common type USSR (SU) tube/semicond. 
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to OSW3111 = 3111_OSW = HF3111 = 6SK7_DDR
Similar Tubes
Other shape (e.g. bulb type):
  6SK7 ; 6К3
First Source (s)
1949 : -- Collector info (Sammler)

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

6sk7_1.png OSW3111: Datenblatt
Wolfgang Bauer

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Just Qvigstad
OSW3111: Radio u. Fernsehen 13/55
Wolfgang Eckardt

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