2SC2078 Transistor
27MHz RF Power Amplifier Applications

2SC2073 Transistor
High Power, High Voltage, General Purpose.Silicon, NPN, 25W, 150V, 150V, 5V, 1.5A, 150

2SC2021 Transistor
General Small Signal Amp.

2SC1980 Transistor
For high breakdown voltage low-noise amplification
Complementary to 2SA0921

2SC1973 Tranistor