811A Tubes For Sale: 811A Tube Specs, Data Sheet & Substitute Info
811A tubes for sale
Single or multiple 811A tubes for sale, select your quantity below:
Each 811A tube for sale at Penta Labs undergoes rigorous quality control testing before shipping, ensuring you receive only the highest-performing units for your application or 811A replacement.
811A tube specs
The 811A tube is a high-performance power triode designed for RF amplifier applications, featuring robust construction and reliable performance characteristics. Originally developed for demanding RF amplification needs, this versatile tube has become a standard in both commercial and amateur radio applications.
Its zero-bias operation capability and high power handling make it particularly suitable for linear amplifier designs. Known for its exceptional durability and consistent performance across varying operational conditions, the 811A has earned a reputation for reliability in continuous-duty applications where stable RF output is crucial. Here's a comprehensive overview of its key specifications:
| Specification | Details |
|---|---|
| Filament Voltage | 6.3V |
| Filament Current | 4.0A |
| Plate Voltage (Max) | 1500V |
| Plate Dissipation | 65W |
| Grid-to-Plate Capacitance | 5.5 pF |
| Grid-to-Filament Capacitance | 5.5 pF |
| Plate-to-Filament Capacitance | 0.8 pF |
| Maximum Frequency | 30 MHz |
| Maximum Plate Current | 175 mA |
| Amplification Factor | 160 |
| Base Type | Medium 4-pin |
| Cooling Method | Forced-air |
811A tube data sheet download
Download our detailed 811A tube data sheet below for comprehensive technical specifications and operational parameters. This document includes complete characteristic curves, typical operating conditions, and maximum ratings to help you optimize your application.
Note: Technical specifications are provided for reference purposes only. For the most current information, always refer to the manufacturer's latest documentation.
811A tube substitute & equivalent information
Understanding compatible substitutes and equivalents is crucial for maintaining equipment functionality. The 811A tube equivalent options provide flexibility in various applications while maintaining performance standards.
Direct Substitutes:
- 811
- 811-A
- 572B (with slight modifications)
The 811A tube can be used as a replacement in equipment originally designed for:
- 810 tubes (with appropriate modifications)
- 812A tubes (in some applications)
- T-160L (in certain RF applications)
When considering substitutions, it's important to note that while these tubes share similar characteristics, some modifications to operating parameters may be necessary. For optimal performance, consult with our experienced vacuum tube manufacturers to ensure compatibility with your specific application.
Common Applications:
- RF power amplifiers
- Linear amplifiers
- Industrial RF heating equipment
- Amateur radio transmitters
- Broadcasting equipment
Operating Considerations:
- Forced air cooling is recommended for optimal performance
- Proper socket connections are crucial for safe operation
- Filament voltage regulation helps extend tube life
- Adequate warm-up time is necessary before applying plate voltage
The versatility and reliability of the 811A tube make it a popular choice across various applications. Whether you're maintaining existing equipment or building new projects, understanding the available substitutes ensures you can make informed decisions about your tube requirements.
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