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 circuit was suggested by Siliconix in a 1980s publication. The circuit uses components from the time...
We found this circuit in an old American documentation. The circuit can be applied to modern...
This circuit is intended for use with common oscilloscopes having been found in documentation on...