Raymarine 4kW Radar Magnetron (Service Part)

This is a genuine Raymarine replacement magnetron for 4kW Raymarine marine radar scanners. The magnetron is the microwave power valve that generates the radar transmit pulse, and it is a wear item: the magnetron heater runs whenever the scanner is in standby or transmit, so over a long service life its output gradually falls and eventually the valve needs replacing to restore full range and target detection.

Fitting a new magnetron is a recognised way to refurbish an otherwise sound 4kW radar rather than replace the whole scanner. Because the work involves high-voltage circuitry and the waveguide, replacement and re-tuning must be carried out by a Raymarine dealer or a suitably qualified marine electronics engineer. This is a genuine Raymarine service part supplied for the repair of an existing 4kW radar scanner.