This 3 A adjustable source uses the LM350 integrated circuit, which must have a good heat radiator. The circuit is from 80s documentation and has been explored in other versions on this site.
This old amplifying stage was found in radios and small amplifiers of the time. The circuit is...
This crystal-controlled oscillator can generate signals as high as 200 MHz. The L1 coil is made up...
The circuit shown in the figure is triggered by an input voltage determined by the setting of P1....