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ID = 38515
Brand: Werk für Fernmeldewesen (OSW, HF, WF) Berlin, VEB, RFT (Ostd.)
Tube type:  Double Diode-Triode   Audio Frequency 
Identical to 6SQ7_DDR = OSW3105
Similar Tubes
Other shape (e.g. bulb type):
  6SQ7 ; 6SQ7GT ; 6Г2

Base Octal (Int.Octal, IO) K8A, USA 1935
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Parallel / series AC/DC
6SQ7_DDR: Collection JR
Jacob Roschy

6SQ7_DDR: ARRL Handbook 1972
Michael Schlör


Usage in Models 2= 1949? ; 1= 1950? ; 1= 1950 ; 2= 1951 ; 1= 1953

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):7

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