8136

Premium high-reliability miniature 9-pin sharp-cutoff pentode featuring a ruggedized frame to deliver low-noise small-signal RF, IF, or audio amplification under extreme environmental stress. Equivalents: 6AU6, 6AU6A, 6136, EF94, CV2522. Real-Life Examples: HP 200CD wide-range audio oscillators, precision laboratory instrumentation panels, vintage military communications grids.