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 different configuration of AM radio with push pull detection and amplification provides good...
This light intensity meter is from a 1978 Texas Instruments optoelectronics manual. The...
This circuit fires a xenon lamp being powered by a 300 V battery. The circuit is from a Radio...