2N525

Historic general-purpose PNP germanium alloy-junction small-signal transistor housed in a metal TO-5 can, highly revered for its remarkably warm tonal character in early audio frequency amplifiers. Equivalents: 2N526, 2N527, NTE102A, AC128. Real-Life Examples: Late 1950s/1960s transistor pocket radios, classic vintage guitar fuzz pedals (e.g., Fuzz Face clones), and early consumer intercom units.