2N499A

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High-frequency NPN silicon planar micro-alloy diffused transistor (MADT) housed in a metal TO-5 can, engineered specifically to serve as a local oscillator, mixer, or low-noise amp lifier in early VHF communication systems. Equivalents: 2N499, NTE161. Real-Life Examples: Vintage shortwave listening receivers, early citizen band (CB) radios, and legacy aircraft navigation transceivers. Show more