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ID = 2753
       
Country:
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Developer: Marconi-Osram - (Valves/Tubes); GB 
Tube type:  Triode, vacuum   Audio Frequency 
  Ca. 1925 up to 1945 rare.
Identical to DH = VT89_GPO = Cv1665
First year 1931 The Saga of Marconi Osram Valve
Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928
Was used by Radio/TV-reception etc.
Filament Vf 16 Volts / If 0.25 Ampere / Indirect / Specified current DC = (Series working)
Description

This tube used as a high efficiency general purpose type for use as a detector or first audio stage. Also available with metallised bulb.

 
Dimensions (WHD)
incl. pins / tip		 50 x 128 x mm / 1.97 x 5.04 x inch
Weight 48 g / 1.69 oz
Information source - - Manufacturers Literature   
Taschenbuch zum Röhren-Codex 1948/49   
4608~~4.png DH: Fin Stewart
Fin Stewart

Just Qvigstad 		d.h_osram.png
DH: osram wireless guide 1931
Giuseppe Antonio Tusini
More ...
Usage in Models 1= 1931 ; 1= 1932?? ; 12= 1932 ; 3= 1933? ; 8= 1933 ; 1= 1934?? ; 2= 1934? ; 7= 1934
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):35

Collection of

Helmut Kerninger (A)
John Koster (NL)
Christian ADAM (F)
Roy Johnson (GB)
Collection of a member from D
 
osram_dh_nvm.jpg

DH
 
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