JAN5687W

Premium military-contract miniature 9-pin high-perveance twin triode manufactured with heavy-duty cathode emitters and ruggedized structures to handle massive peak currents in pulse and digital circuits safely. Equivalents: 5687, 5687WB, 7119. Real-Life Examples: IBM 704 early mainframe computing bays, military radar tracking frames, high-end custom audiophile headphone amplifiers.