Featured in the February 1949 Radio Electronics magazine, this benchtop instrument generates multi-range audio signals. The circuit has 6 tubes including the rectifier.
This circuit was found in a French publication called Generation Electronique, It can be assembled...
The configuration shown in the figure is one of the most traditional when it is desired to produce...
This simple circuit for a common 110 V power grid was found in a 1980s American documentation. The circuit uses...