Antique radios, Old Time Radios

DG407

Country:	Hungary		Brand:	Tungsram; Budapest (see also British T.)
			Tube type:	Space Charge Tetrode

Tube ID = 3152

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Identical to	DG407
Similar Tubes	Other characteristic (electr. data): A441; A441N; DM300_old; KL70410; RE074d; U409D

Base	Europe 4-Pin (A, 4A, B4, since 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 Text in other languages (may differ)
Literature	Taschenbuch zum Röhren-Codex 1948/49


	DG407: H. Börner Wolfgang Holtmann

DG407: Telefunken Werkstattbuch
Wolfgang Bauer

DG407: Röhrentaschenbuch, Beier, 1956
Michael Schlör

Usage in Models	1= 1934 ; 1= 1935 ; 1= 1938 ; 1= 1940 ; 1= 1942
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 5

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