CV64 S-band magnetron.

The valve measures approx 200x37x75mm overall.

CV64 S-band magnetron. This is an early strapped magnetron, the first large-scale production device to use echelon strapping technique. It was the successor to the CV38 (unstrapped) (see REL3C which is equivalent to the CV38).

The CV64 operated at 9.1cm with an input of 130kW peak (330W mean) at an efficiency of 30%.

The serial number is hard to make out but is possibly 9423, as the valve has A09423 stamped on the same side. It has the numbers 6443 stamped on the other side.

The magnetron was used in the AI Mk VIII radar, at first modulated by two CV57 tetrodes, later by the CV85 trigatron. It was also used in H2S. CV192 is an uprated version of the CV64.