The transistor can be a BC548 and the coil has the following characteristics for 1 MHz. L1 has 80 turns of wire 28 in a ferrite rod and L2 of 30 and 40 turns.
This circuit is from 1990 documentation. It can be implemented with BC548 transistors instead of...
This circuit can be used to excite push-pull steps of audio amplifiers. From an audio signal at...
This charger for currents up to 100 mA was found in a 1980 publication. The transistor could be...