**Eimac 4CX250B** model is a vacuum tube (Electron Tube) used in electronic and radio industries to amplify high power signals. This tube, also known as **4CX250B**, is used primarily in RF (radio wave) equipment and power amplifiers.

### **4CX250B key features:**

1. **Lamp type:** power amplifying vacuum lamp (RF power tetrode)

2. **Output Power:** Capable of providing high output power, typically up to 250 watts, which is essential for amplifying radio and RF signals.

3. **Frequency band:** Suitable for use in radio frequencies and related applications.

4. **Structure:** Vacuum lamps of this type usually include electrodes that are located in a vacuum chamber and are designed to amplify signals.

5. **Connection base:** These lamps usually have standard bases for connecting to electronic circuits and amplifiers.

### **Applications:**

- **RF amplifiers:** in radio and television systems to amplify RF signals.

- **Communication equipment:** in equipment Communication with the need for high power and precision in amplifying signals.

- **Amateur radio:** In amateur radio systems to amplify transmitted signals.

Vacuum tubes such as the 4CX250B are still used in some special applications and professional equipment due to their unique ability to amplify high power signals. For more information and to buy this lamp, you can refer to electronic and radio equipment suppliers.