This ultra-low noise amplifier and simple power supply was found in Analog Devices documentation from the 90's. The circuit can be implemented with modern equivalent components.
This elementary receiver with a crystal earphone was found in Japanese documentation from the...
The circuit shown in the figure uses the ST8R00 from ST Microelectronics which consists of a 1 A...
This circuit serves as a reference to learn how signals were decoded in the 1960s. The fully...