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725A

Information - Help 
ID = 17470
       
 
   
Tube type:  Pulse magnetron   SHF/EHF (>3 GHz) 
Identical to 725A = CV722
Similar Tubes
Normally replaceable-slightly different:
  CV748
Multiple differences or of other kind:
  2J51A ; CV214
Predecessor Tubes 2J21A   2J21  
Successor Tubes MX52   CV208   730A   2J53   CV208_prototype   CV209  

Was used by Radar
Filament Vf 6.3 Volts / If 1 Ampere / Half indirect
Description

Fixed frequency, 9375MHz, magnetron capable of delivering 60KW pulse. Flanged waveguide parallel to the cathode axis.
One of the first X-band magnetron produced in large quantities since WWII. 725A was developed by Bell Telephone and WE, scaling down the S-band design and increasing the cavity number to 12, to operate with relatively small permanent magnets. Production started in the late 1942. 89,480 units of this magnetron were supplied to British Empire under the Lend-Lease law.
Widely used in several aircraft radar equipment, such as AN/APS-3, AN/APS-4 and AN/APS-15.
Several manufacturers, including Amperex, Mullard, Northern Electric, Philips, Raytheon, Toshiba, Valvo and Western Electric.

 
Tube prices 1 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   
-- Original prospect or advert   Callick, Metres to Microwaves
- - Manufacturers Literature
Tube Lore (I)
 
725a_1.jpg
725A: Private collection
Emilio Ciardiello

 
725a_01.png
725A: Manufacturer's Literature
Emilio Ciardiello


Usage in Models 1= 1949

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


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