This amplifier for recording heads was found in a Radio Electronics from September 1963. The circuit uses period transistors but can be modified to work with modern transistors.
This isolated solid state relay can function as a shield directly controlling 10 A loads. The...
This oscillator was found in Radio Electronics from the 90s. C1 and C2 have 2,700 pF and the...
This circuit uses a current regulator from the 90's. This component is uncommon nowadays. The...