2N2484

Ultra-low-noise, high-gain NPN silicon planar small-signal transistor housed in a metal TO-18 can, engineered specifically for precision low-level audio preamplifier stages and input instrumentation blocks. Equivalents: 2N930, BC109, BC549 (plastic TO-92 version), NTE123A. Real-Life Examples: Vintage studio microphone preamplifiers, high-end classic analog mixing console channels, and laboratory-grade acoustic testing instruments.