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1D7

Information - Help 
ID = 3993
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Pentagrid-Converter (Heptode)   Pentagrid (old)   Controlling (mu) 
Identical to 1D7 = 1D7G

Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Ut)
Filament Vf 2 Volts / If 0.06 Ampere / Direct / Battery =
Information source Taschenbuch zum Röhren-Codex 1948/49   
  valvula1d7.png
  1D7: Internet
Miguel Angel Trujillo-Rodriguez
 
413_3.png
1D7: Telefunken Werkstattbuch
Wolfgang Bauer

 
1d7_spec.png
1D7: Grundig Rö-Tabu, zum M1, Band 3, 1948
Anonymous 15 Collector


from Just Qvigstad

Usage in Models 2= 1938??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2

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