6AS6 RCA

Description

Versatile Miniature RF Pentode
The RCA 6AS6 (also known as 5725) is a sharp-cutoff miniature 7-pin pentode vacuum tube. It offers exceptional performance in gated amplifiers, mixer circuits, and frequency-conversion stages. Moreover, its compact design suits both broadcast and communication equipment. Because of its versatility and reliability, the 6AS6 remains a staple in vintage radio restoration and high-frequency builds.

Clean, Low-Noise Amplification
This tube exhibits high transconductance and low internal capacitance, which ensures smooth signal amplification with minimal distortion. Additionally, its precision-engineered internal layout minimizes microphonics and hum. As a result, the 6AS6 delivers crisp, clear audio and RF output even under demanding conditions.

Reliable Frequency Conversion
Designed originally for dual-control use, the 6AS6 supports gated amplification and mixer functions effectively. Furthermore, its suppressor grid design provides stable operation in modulation and switching circuits. Consequently, engineers and hobbyists rely on this tube for consistent frequency performance across applications.

Compact Construction and Compatibility
The 6AS6 fits a standard 7-pin miniature (B7G) socket, making it easy to install in both vintage and custom chassis. It also aligns with equivalent types like 5725 and 6AS6W. Therefore, it integrates seamlessly into existing designs without modifications.

Authentic RCA Quality and NOS Availability
RCA’s versions, especially NOS (new-old-stock), offer authentic build quality, durable internals, and stable electrical characteristics. Moreover, these tubes often come in original packaging and retain factory specifications. Consequently, they remain trusted by restorers and collectors seeking reliable performance.

Perfect for RF and Audio Projects
Whether you’re restoring classic radio gear, designing gated amplifiers, or building frequency modulators, the RCA 6AS6 RF pentode provides low-noise gain, compact size, and vintage reliability. Thus, it remains an ideal choice for high-frequency analog circuits and audio applications.