We found this tube receiver in a 1950s Japanese publication. The circuit uses 5 tubes and has an RF amplifier stage for greater sensitivity. The power supply is not shown on the circuit.
This interface was found in a Modern Electronics magazine from 1990. Although the circuit is...
This circuit, found in a 1980 publication, limits the amplitude of the output signal to a value...
The circuit is from old documentation from the 70s, but the components are still common, as the...