The **2M213-R** (often referenced interchangeably with similar series like the 2M213 or 2M246) is a high-power **Magnetron** vacuum tube. It is primarily used as the microwave-generating component in industrial and high-end consumer microwave ovens. --- ### 1. Key Technical Specifications The following table outlines the typical electronic characteristics of a 2M213-R magnetron: | Parameter | Typical Value | Unit | | :--- | :--- | :--- | | **Operating Frequency** | 2460 | MHz | | **Average Output Power** | 850 - 950 | Watts | | **Anode Voltage (Peak)** | 4.1 - 4.5 | kV | | **Filament Voltage** | 3.15 | V (AC) | | **Filament Current** | 10.0 - 12.0 | A | | **Cooling Method** | Forced Air | - | --- ### 2. Main Internal Components A magnetron is a complex vacuum tube that converts high-voltage electrical energy into microwave radiation. 1. **The Cathode/Filament:** Located in the center. It is heated by the 3.15V supply to emit electrons via thermionic emission. 2. **The Anode Block:** A cylindrical copper block with "resonant cavities." The shape and size of these cavities determine the frequency (approx. 2.45 GHz). 3. **Permanent Magnets:** Two large ring magnets (usually Ferrite) located at the top and bottom. They create a magnetic field perpendicular to the electric field, forcing electrons into a circular path. 4. **The Antenna (Output Probe):** A metal cap at the top that radiates the generated microwaves into the waveguide. 5. **Cooling Fins:** Aluminum plates surrounding the anode to dissipate the intense heat generated during operation. --- ### 3. Connection and Wiring The 2M213-R typically features a standard plug-in terminal: * **FA and F Terminals:** These connect to the secondary winding of the High Voltage Transformer (HVT). * **Case Ground:** The metal body of the magnetron acts as the Anode and is connected to the chassis ground of the microwave. * **Filter Box:** Contains high-voltage capacitors and inductors (chokes) to prevent RF interference from leaking back into the power lines. --- ### 4. Safety and Maintenance Warnings Because this part deals with high voltages and microwave radiation, specific precautions are required: * **High Voltage:** The magnetron operates at over 4,000V. The high-voltage capacitor in the circuit can hold a lethal charge even after the power is unplugged. * **Beryllium Oxide (BeO) Warning:** Some magnetron ceramic insulators contain BeO. If the ceramic is broken, the dust is highly toxic if inhaled. * **Testing:** You can test the filament for continuity (should be < 1 Ohm), but you should **never** attempt to power a magnetron outside of its shielded enclosure. ---