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DG407

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ID = 3152
       
Country:
Hungary
Brand: Tungsram; Budapest (see also British T.)
Tube type:  Space Charge Tetrode 
Identical to DG407
Similar Tubes
Normally replaceable-slightly different:
  RO4141
Other characteristic (electr. data):
  A441 ; A441N ; DM300_old ; KL70410 ; RE074d ; U409D
Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eu) Sidecontact.
Filament Vf 4 Volts / If 0.07 Ampere / Direct / Battery =
Description Vom Hersteller als "Doppelgitterröhre" bezeichnet. Bekannt ist sie in der Raumladegitterschaltung für den Kosmos Radiomann und vielen anderen Bastelanleitungen geworden. Siehe: http://www.radiomuseum.org/dsp_forum_thread.cfm?board_id=13560 
Information source Taschenbuch zum Röhren-Codex 1948/49   
tubeenvdiag_klein_dg407_1.png
DG407: H. Börner
Wolfgang Holtmann
2_9.png DG407: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad 		dg407_data.png
DG407: Röhrentaschenbuch, Beier, 1956
Anonymous 10 Collector
Usage in Models 1= 1933 ; 1= 1934 ; 1= 1935 ; 1= 1938 ; 1= 1940 ; 1= 1942
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):6
 
dg_407_tube.jpg

 
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