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6A7_DDR

Country:  Germany      Brand:  Werk für Fernmeldewesen (OSW, HF, WF) Berlin, VEB, RFT (Ostd.) 
  Tube type:  Pentagrid-Converter (Heptode)   Pentagrid (new) 
Tube ID = 38589
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Identical to 6A7_DDR = HF3104 = OSW3104 = 6SA7_DDR
Similar Tubes Other shape (e.g. bulb type):
 6SA7GT; 6a10s; 6a7
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 / -: Parallel / series AC/DC /
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6a7_6sa7_rft604.jpg
6A7_DDR: W.E.
Wolfgang Eckardt
 
6sa7_6a7_osw_1.gif
6A7_DDR: Beier, RTB 1965
Wolfgang Eckardt
 
Usage in Models   1= 1948??
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):   1
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