USN-6J6WA

Premium ruggedized miniature 7-pin common-cathode twin triode manufactured under strict Navy/military contracts for long-life stability in RF mixers and tracking circuitry. Equivalents: 6J6, 6101, ECC91, CV4031, M8081, 6CC31. Real-Life Examples: USN shipboard radio receivers, early tactical airborne communications gear, military test oscillators.