Virtual Valve Museum

Virtual Valve Museum

HomeFull List

This is an archive website. It will not receive any updates, additions or corrections.

CV41 magnetron

This valve measures 245x114x68mm overall.

This magnetron has the serial number 10134 and might be a type 'B' but it is unclear.

The CV41 was developed in 1941 and used in early production models of the GL3 radar. It was the last unstrapped S-band magnetron to be developed in the UK and was replaced in 1942 with the echelon strapped CV120.

Heater voltage6.0V
Heater current7.0A
Max anode dissipation1000W
Wavelength *10.70 ±0.2 cm
Typical operating conditions **
Peak anode voltage25kV
Peak anode current40A
Average output peak power170kW
Magnetic field860 oersteds
Approx air blast100 cu ft/min

*: there are three frequency variants: A has a wavelength of 10.56, B is 10.70 and C is 10.84 cm, all ±0.07cm.
**: These operating conditions refer to a sensibly square pulse shape, 1µs duration, repetition rate 500 cycles per second max, and during operating and testing air must be blown through a fitting surrounding the fins. In no case shall the temperature of the anode exceed 140°C.

Side view