RF or even switching transistors like the 2N2222 can be used in this circuit. The capacitors are ceramic and the frequency is determined by the crystal.
This is the typical circuit of an FET amplifier stage in the common source configuration. The circuit is...
This is the conventional version of capacitance multiplier with operational amplifier that appears in...
This transmitter with counterphase oscillator was obtained in a documentation from the 90s. The...