Table of Contents
How does a magnetron generate microwave?
The cavity magnetron is the main component of a microwave. The magnetron is an oscillator where electrons are emitted from a hot cathode and whirl past resonant cavities which are part of the anode at speeds that generate microwave energy.
How magnetron works explain in detail?
A magnetron’s job is to generate fairly short radio waves. The magnetron does its stuff by resonating like a flute when you pump electrical energy into it. But, unlike a flute, it produces electromagnetic waves instead of sound waves so you can’t hear the resonant energy its making.
What is the function of magnetron?
Magnetrons are capable of generating extremely high frequencies and also short bursts of very high power. They are an important source of power in radar systems and in microwave ovens.
What happens if you touch a magnetron?
The magnetron inside a microwave can contain beryllium oxide in their ceramic insulators which can be fatal if it gets into the lungs. Simply removing it is safe, but never try to take one apart. It’s not worth it!
How many running hours must be consumed before replacing magnetron?
Based on typical marine radar use, manufacturers recommend replacing magnetrons between 2,000 and 6,000 transmitting hours. However, CEAT found that magnetrons used in avian radar typically could be used for 12,000 hours of continuous operation before needing replacement.
How do you control back heating in a magnetron?
If the magnetic field is made larger than the critical field (B>Be), the electron experiences a greater rotational force and may return back to cathode quite faster. All such electrons may cause back heating of the cathode. This can be avoided by switching off the heater supply after commencement of oscillation.
Why is it important to always adjust your radar’s gain and clutter settings right after taking over the watch?
GAIN: The gain control on the keyboard is used to adjust the sensitivity of the radar. It should be so adjusted that the background noise is just visible on the screen. In simple words, if the gain is set too low, weak echoes may be missed while excessive sensitivity yields too much background noise.
How do you test the performance of the radars on board your ship?
How to check Radar performance? What entries are made in Radar Log Book?
- Press the performance monitor button.
- Plume will appear.
- Measure the plume and compare it with the maker’s reading at the time of radar installation.
- Note down the plume difference, EBL and visual bearing difference, radar status in radar log book.
Why does magnetron use strapping?
The cavity magnetron is acts like a microwave oscillator and generates microwaves and it uses strapping to prevent mode jumping.