Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 7719
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Tube type:  Triode, vacuum   Power/Output 
  <1925 rare.
Identical to DE4
Similar Tubes
Normally replaceable-slightly different:
First Source (s)
1925 : Saga of the Vacuum Tube, Tyne p.382

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 (Codex=Eo)
Filament Vf 3.8 Volts / If 0.3 Ampere / Direct / Parallel, (AC/DC)
Description Low Frequency Power Amplifying Valve.
Codex erroneously says 4 V; 0.08 A; similar to RE084, which is not correct. 
Dimensions (WHD)
incl. pins / tip
55 x 125 x mm / 2.17 x 4.92 x inch
Tube prices 2 Tube prices (visible for members only)
Information source - - Manufacturers Literature   1924
Taschenbuch zum Röhren-Codex 1948/49
Bekir Yurdakul

DE4: eigene Zeichnung nach RTT
Werner Braun

DE4: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector

from Just Qvigstad

Usage in Models 1= 1922?? ; 1= 1924 ; 1= 1926? ; 1= 1927?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):4

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]