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ID = 48175
Great Britain (UK)
Brand: Common type Great Britain tube/semicond.
Developer: GEC, General Electric Co.; London 
Tube type:  Pulse magnetron   SHF/EHF (>3 GHz) 
Identical to NT98D = CV1494
Predecessor Tubes NT98  
Successor Tubes CV56D  

Base Wires
Was used by Radar
Filament Vf 6 Volts / If 1.2 Ampere / Half indirect

This is one of the four frequency selections derived from NT98.

  • 2940 to 2980 MHz
  • 8A at 9.5 kV input pulses
  • 8 kW typical output pulses, 5 kW minimum.

NT98D was later listed in the CV register as CV1494.

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

Information source -- Original-techn. papers.   
NT98D: Private collection
Emilio Ciardiello

NT98D: Manufacturer's Literature
Emilio Ciardiello

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