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

NR31

Information - Help 
ID = 14556
       
Country:
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Developer: Marconi-Osram - (Valves/Tubes); GB 
Tube type:  Triode, vacuum   Detector 
  Ca. 1925 up to 1945 very rare. ***
Identical to NR31 = CV1037 = 10E/9598 = AR17 = 7413 = VT139_GPO = CV399 = VR37
Similar Tubes
Normally replaceable-slightly different:
  MH4

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=F)
Was used by Military and/or Government
Filament Vf 4 Volts / If 1 Ampere / Indirect / Specified voltage AND current AC/DC
Description

Metalised body. Made for the British Navy

 
Information source Babani, International Radio Tube Encyclopaedia   p. 120 & 121
-- Original-techn. papers.   
-- Collector info (Sammler)
Taschenbuch zum Röhren-Codex 1948/49

nr31_so.png NR31: rtt
Anonymous 10 Collector


Just Qvigstad
cv399nr31_1.png
NR31: Manufacturer's Literature
Emilio Ciardiello

More ...

Collection of

 
nr_31.jpg

NR31
 

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