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 determines the frequency of a signal by beating with a known signal. The circuit was...
This converter for WWV time reference station signals was found at Popular Electronics. The 15 MHz...
This circuit was obtained from an 1974 Everyday Electronics magazine. The circuit is still current as...