This old configuration of an audio amplifier has a push-pull two-transistor output stage. Output power is low and the critical components are the transformers. The circuit was found in an 1958’s publication.
This circuit was found in 80's Popular Electronics. The circuit uses an infrared-sensitive phototransistor...
This circuit, which in our times would be called a shield, can also be used with other loads. The...
Found in Philips documentation from 1968 this circuit operates at frequencies up to 10 MHz with 76...