radiomuseum.org
Please click your language flag. Bitte Sprachflagge klicken.

R_Osram

Information - Help 
ID = 27382
       
Country:
Great Britain (UK)
Brand: Common type Great Britain tube/semicond.
Tube type:  Triode, vacuum   Universal 
  <1925 rare.
Identical to R_Osram = TM = RAF
Similar Tubes
Other shape (e.g. bulb type):
  R_England
Normally replaceable-slightly different:
  RA_Mullard ; VT3_GPO
Other base:
  VT4_GPO

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.65 Ampere / Direct / Battery =
Description

copy of french TM during WW1. A "hard" tube, first made by the Osram Lamp Works September 1917. Also made in England by B.T.-H., ..Metropolitan Vickers (Cosmos), A.C.Cossor Ltd, Cryselco Electric Lamp Company, Edison-Swan, Mullard Radio Valve Company, Marconi Wireless and Telegraph, Stearn's Electric Lamp Company and H.W.Sullivan Ltd. An Osram R tube exists with a factory fitted American "Shaw"-UV base. The Tube was known as VT4 in the British Post Office. British Navy version NR12. The Osram brand was discontinued on this tube with the formation of the Marconi Osram valve Co in 1919. Late in 1925 the company used bakelite bases for the tube

 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
x 118 x 54 mm / x 4.65 x 2.13 inch
Weight 52 g / 1.83 oz
Tube prices 4 Tube prices (visible for members only)
Information source -- Collector info (Sammler)   
Saga of the Vacuum Tube, Tyne   Pages 170-172, 217-221,380
70 Years of Radiotubes and V.
British Radio Valves - The Vintage Years, Thrower
 
rosram-valvesg.e.c.triodehoch-vakuumuniversal_1_klein_klein.jpg
R_Osram
Geri Meier

 
r_osram_so.png
R_Osram: rtt
Michael Schlör

 

from Just Qvigstad

Usage in Models 1= 1924

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1


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]
  
rmXorg