The 2N4427 is a through hole NPN VHF Oscillator power amplifier silicon planar epitaxial transistor in a TO-39 package marked "ON 2N4427 0538" . This transistor is designed for VHF amplifier and oscillator applications.
ST 2N2219A Bipolar (BJT) Single Transistor, NPN, 40 V, 300 MHz, 800 mW, 600 mA, 300 hFE, TO-39 Package...
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