This circuit was found in documentation from the 1970s. However, it can be implemented with modern transistors such as 2N2222 for Q1 and BF494 for Q2. The crystal depends on the desired frequency.
Suggested by Motorola in 1968 documentation, this circuit has an efficiency of 70%. Power...
Toshiba LDO Regulators Toshiba has a wide variety of low voltage drop (LDO) linear regulators...
Found in a 90s Popular Electronics, this Hartley oscillator uses an output transformer of the type...