Description
Compact Dual Triode for RF and Audio
The Philips ECC91, also known as 6J6, is a miniature double triode vacuum tube crafted for RF amplification, signal mixing, and phase inversion. It contains two identical triode units housed in a compact envelope, offering excellent symmetry and consistent gain. Because of its size and reliability, the ECC91 remains a trusted choice for VHF oscillators, lab gear, and compact audio designs.
Clean, Balanced Signal Performance
Each triode section delivers matched gain, allowing balanced signal handling in push-pull and symmetrical circuits. The ECC91 performs exceptionally well across VHF frequencies, offering fast response and minimal noise. Moreover, Philips built this tube to operate efficiently with low capacitance and high linearity. In addition, the design prevents signal degradation under thermal load. As a result, users enjoy reliable and stable signal performance in high-frequency environments.
Space-Saving Design with Broad Fit
With a B7G 7-pin base and small glass form factor, the ECC91 installs easily into space-constrained circuits. Therefore, it’s ideal for radios, RF front ends, test equipment, and small signal preamps. Furthermore, it serves as a direct replacement for 6J6 and CV4024 equivalents. Whether you’re working on vintage restoration or designing a modern hybrid circuit, the ECC91 drops in effortlessly.
Philips Quality and Longevity
Philips manufactured the ECC91 with a focus on durability and electrical consistency. Its precisely aligned internals, strong pins, and stable vacuum ensure long-lasting performance. Additionally, the tube maintains signal quality across extended use and varying temperatures. For professionals and hobbyists alike, this makes it a dependable solution for daily use or long-term installs.
Ideal for High-Frequency Circuit Design
Whether you’re building an RF mixer, tuning a phase inverter, or repairing lab equipment, the Philips ECC91 delivers dependable gain, compact versatility, and clean signal output. Choose this dual triode for reliable performance in both RF and audio-frequency applications.





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