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

1259M

Information - Help 
ID = 78401
       
Country:
United States of America (USA)
Brand: Bell Labs; Murray Hill, NJ.
Developer: GEC, General Electric Co Ltd., GENALEX; London 
Tube type:  Pulse magnetron   SHF/EHF (>3 GHz) 
  Ca. 1925 up to 1945 no serial production. For instance only development samples. *****
Identical to 1259M = D-160052
Predecessor Tubes E1189  
Successor Tubes D-160052  

Was used by Radar
Filament Vf 6 Volts / Half indirect
Description

Early copies made at Bell of the British GEC E1189 S/N 12 magnetron brought to America by the Tizard Mission. The GEC sample was successfully operated at Bell on 6 October 1940. British asked Western Electric to run production lots of the tube for them.  Bell Telephone built very early qualification samples which were delivered within November 1940. A sample with dual marking Bell / WE, carrying the Bell developmental code 1259 M, is today on display in the online collection of the Birmingham University, record 144, ID number BIRRC-P090.

A total of some 60 additional prototypes were later made by Western Electric at the new magnetron facility in Chicago, Ill. with developmental code D-160052. Most of them were distributed to the MIT Radiation Lab and to American firms involved in the microwave radar developments. Other qualification samples were commissioned by British to Raytheon, but their quantity is unknown.

As the original British sample, both the Bell 1259M and the D-160052 units came with eight-fin radiator. We will see that their production outcomes from Bell related companies, REL3D and NTA98, were updated to the latest NT98 design, with four radiating fins.

The development of the E1189 magnetron at GEC can be read at this link.

 
Information source -- Original-techn. papers.   The creative ordeal, Otto J. Scott
-- Collector info (Sammler)   

 

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