We found this circuit with transistors in a Philips documentation from 1968. The double transistor can be replaced by discrete married types. The power supply is symmetrical.
This crystal oscillator uses a common transistor and its frequency depends on the crystal used. We...
This circuit was obtained from a 1968 Philips publication. The transistors are of the time. Dual...
This circuit was found in a Hands On Electronics from the 80's. The circuit emits an audible alert...