This amplifier for playback of recordings was found in a 1947 manual. It uses a push-pull output with a tube power supply.
This circuit is from a 1986 Revista Española de Electrónica. It consists of an amplifier with...
The oscillator shown in the figure can generate signals between 3 and 15 MHz approximately, depending...
This circuit was found in a 1967 documentation. The switch diode is a component of the time and is...