Overview
The RCA 6X4 electron tube is a double-diode vacuum rectifier widely used in audio equipment, radio receivers, and consumer electronics from the mid-20th century. As part of RCA’s extensive tube lineup, the 6X4 delivers stable rectification for power supply circuits. This new in box specimen maintains original condition and is suitable for restoration projects, vintage audio systems, and tube-based equipment repair.
Key Features
- Double-diode rectifier tube design for AC-to-DC power conversion
- Octal (8-pin) base configuration for standard tube socket compatibility
- Indirectly heated cathode system for reliable operation
- Manufactured by RCA – leader in vacuum tube production
- New in box condition with original packaging
- Suitable for vintage radios, amplifiers, and consumer electronics applications
Technical Specifications
- Tube Type: Double-Diode Rectifier
- Manufacturer: RCA Corporation
- Base Type: Octal (8-pin)
- Heater Voltage: 6.3 V AC
- Heater Current: 1.05 A (typical)
- Maximum Plate Voltage: 330 V DC (per plate)
- Maximum Plate Current: 125 mA (per plate, typical)
- Tube Class: Receiving tube
- Condition: New in box
- Application Category: Vacuum Tubes & Parts
Typical Applications
The 6X4 is commonly found in:
- Vintage vacuum tube radios and receivers (AM/FM)
- Tube-based audio amplifiers and preamps
- Guitar amplifiers and vintage musical equipment
- Consumer electronics from the 1940s–1960s
- Laboratory and test equipment power supplies
- Restoration and repair of vintage electronics
Compatibility & Replacements
Compatible With
- Standard octal (8-pin) tube sockets
- Vintage radio and audio equipment circuits designed for 6X4 specification
- AC power supplies rated for 330 V maximum plate voltage
- 6.3 V AC heater supplies (standard in vintage tube equipment)
Replaces / Drop-In Replacement For
The RCA 6X4 is a direct replacement for equivalent 6X4 tubes from other manufacturers (Sylvania, GE, Tung-Sol) where the same electrical characteristics are required. Verify tube availability and original equipment specifications before substitution.
Works With
- Classic vacuum tube radio schematics calling for 6X4 rectifier
- Vintage audio equipment restoration and repair documentation
- Tube testers and tube matching equipment
- Antique and vintage electronics restoration communities
