JHS5814A

Premium military-contract miniature 9-pin medium-mu twin triode manufactured by CBS/Hytron under Joint Army-Navy parameters for deployment in harsh vehicular or airborne radio systems. Equivalents: 12AU7, 12AU7A, ECC82, 5814A, 6189. Real-Life Examples: US military field communications consoles, naval shipboard tracking radio panels, heavy-duty industrial instrument frameworks.