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ID = 42868
Great Britain (UK)
Brand: Common type Great Britain tube/semicond.
Developer: GEC, General Electric Co Ltd., GENALEX; London 
Tube type:  Pulse magnetron   Text 
Identical to CV56 = REL3DX
Similar Tubes
Other characteristic (electr. data):
  CV56A ; CV56B ; CV56C ; CV56D
Predecessor Tubes NT98   Q85033  
Successor Tubes CV76  

Was used by Radar
Filament Vf 6 Volts / If 1.25 Ampere / Half indirect

The first strapped 8-cavity magnetron. It was introduced around the end of 1941 after that Sayer devised the use of strapping to prevent mode jumping. The design was developed at GEC by W.E. Willshaw, A.G. Stainsby and E. Kettenwell, adding strapping jumpers to the NT98 resonating anode block.
Used in the Type 271Q Naval radar, it gave 80 to 100 KW in S-band, at 15KV, 15A peak anode pulses, with an efficiency of about 40%.

No suffix CV56 can be considered quite rare, since very soon it was replaced by its four frequency selections, adding a letter A to D to the code.

Information source -- Original prospect or advert   Callick, Metres to Microwaves

Collection of



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