5725 RCA

Description

Dual-Control Pentode Design
The RCA 5725 is a high-quality miniature 7-pin dual-control pentode designed for audio amplification and RF/IF stages. Because it offers improved gain and reduced noise, it became a staple in mid-century radios, microphone preamps, and communication gear. Moreover, its compact size suits tight chassis designs without compromising signal performance.

Clear Amplification with Low Noise
This pentode delivers consistent and smooth signal gain across audio and RF frequencies. Its precision-engineered internal structure minimizes microphonics and hum. Additionally, the low interelectrode capacitance ensures fast transient response and high-fidelity audio output. As a result, you’ll notice clear, crisp sound that enhances both restoration and custom audio projects.

Robust Build with Long Lifespan
Constructed during RCA’s peak manufacturing years, the 5725 features a durable glass envelope and solid internal support. Furthermore, its heater-cathode design promotes reliable warm-up behavior and reduces stress on power supplies. Therefore, it maintains stable performance under long operation and varying load conditions—making it a dependable choice for serious builders.

Easy Integration and Replacement
The 5725 fits standard 7-pin miniature sockets and directly substitutes for equivalent tubes like 6AS6 and 6AS6W. This plug-and-play compatibility lets you upgrade or repair vintage radios and equipment without rewiring. Whether you’re working on a tabletop radio or a vintage preamp, this tube installs smoothly and performs reliably.

Ideal for Audio & RF Projects
If you’re restoring classic audio gear or constructing high-quality RF circuits, the RCA 5725 offers low-noise gain, compact form, and enduring service life. Thus, it remains a valuable component for veterans and hobbyists seeking vintage sound and dependable performance.