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ID = 21914
Brand: Werk für Fernmeldewesen (OSW, HF, WF) Berlin, VEB, RFT (Ostd.)
Tube type:  Pentagrid-Converter (Heptode)   Pentagrid (new) 
Identical to OSW3104 = 3104_OSW = HF3104 = 6A7_DDR = 6SA7_DDR
Similar Tubes
Other shape (e.g. bulb type):
  6SA7GT ; 6А10С ; 6А7
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

OSW3104: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Anonymous 10 Collector

6sa7_1.png OSW3104: Datenblatt
Wolfgang Bauer

Just Qvigstad
OSW3104: Werk für Fernmeldewesen Schöneweide
Egon Strampe

Usage in Models 1= 1945?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):1

Collection of



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