The CV1481 is part of a series of four WWII radar magnetrons that differ only in frequency. The CV1479 (3.045 GHz), CV1480 (3.018 GHz), CV1481 (2.993 GHz) and CV1482 (2.965 GHz) are improved versions of the CV76A, CV76B, CV76C and CV76D respectively.
The values for voltage and current given are maximum peak values. These magnetrons were designed for pulse operation not for continuous RF production. The pulse repitition frequency was 500 pulses per second and the pulse duration ranged from 0.7 to 2 μs. The total anode dissipation was 600 W. The CV1481 operated at 2.993 GHz.
This exhibit came in its original cardboard sleeve.
The oxide coated cathode is strapped internally to one side of the filament. The marking makes clear which side.
The probe and screw fixing thread. The magnetron is missing the powerful magnet that causes the electron beam to spiral around from cathode to anode. Also in use it would be coupled to TR cells that would ionise to effectively seal off the waveguide port that went to the sensitive receiver.
The glass to metal seals, filament insulation tube and ceramic bead covered filament leads. The anode would be at ground potential and the cathode would be sitting at 27 kV negative of ground.
The wide metal tube envelope is 76 mm in diameter, and excluding the leads is 195 mm tall. The central unit is 37 mm front to back.