Overview
The National Electronics 481B is a 4 pin electric tube manufactured by National Electronics for industrial and specialized electronic applications. This unit is new and in open box condition, making it an economical choice for replacement or repair work in systems requiring this specific tube type.
Key Features
- 4 pin configuration for compatibility with standard tube sockets
- New, open box condition
- Manufactured by National Electronics, a established tube manufacturer
- Suitable for industrial and business equipment applications
Technical Specifications
Refer to the specifications table for detailed information about this tube. Pin configuration and electrical characteristics may vary depending on specific application requirements. Consult your equipment documentation or contact our technical team for application-specific details.
Typical Applications
- Industrial electronic equipment repair and replacement
- Vintage or legacy system maintenance
- Audio and RF equipment using 4 pin tube configurations
- Testing and measurement instrumentation
Compatibility & Replacements
Compatible With
- Equipment designed for 4 pin electric tubes
- Industrial electronic systems from the National Electronics era
- Specialized instrumentation requiring this tube type
Replaces / Drop-In Replacement For
Verify compatibility with your specific equipment before ordering. The National Electronics 481B is designed for systems that call for this exact model number.
Works With
- Standard 4 pin tube sockets
- Electronic equipment with compatible pin spacing and electrical requirements




