Antique radios, Old Time Radios

Dn1004

Country:	Netherlands	Brand:	Radio-Record - Röhrenmarke; Holland
		Tube type:	Vacuum Pentode Power/Output
			Ca. 1925 up to 1945 rare.

Tube ID = 11175

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Identical to	Dn1004
Similar Tubes	Normally replaceable-slightly different: E443N; PP4100; RES664d
First Source (s)	1930 : Radio-Expres, Netherlands

Base	Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eoo)
Filament	Vf 4 Volts / If: 1 Ampere / -: Indirect / -: Parallel, (AC/DC) /
Description	Gm=2.2 at Va=200. R int=45k. (Radio-Expres 1930) To avoid the Philips penthode patent, Tungsram and Radio Record (and others)made tetrodes with a penthode characteristic. These tubes are listed as penthodes in tube manuals but are not. The use of the top connection is optional.
Dimensions (WHD) incl. pins / tip	52 x 148 x 34 mm / 2.05 x 5.83 x 1.34 inch
Weight	82 g / 2.89 oz
Literature	Taschenbuch zum Röhren-Codex 1948/49 Radio-Expres, Netherlands - - Manufacturers Literature

Dn1004: W.E.
Wolfgang Eckardt

Dn1004
Peter den Boer

Dn1004: own collection
Peter den Boer

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