This circuit with the HA2400 was found in the March 1980 Radio Electronics magazine. The circuit has digital-gain control and must be powered by a symmetrical 15 V source.
Found in an American publication from 1969, this circuit can be adapted to be used as a shield....
This circuit aims to replace a 90 V battery used in old tube radios. The circuit uses a...
Mouser Electronics is making available the new regulator type Buck FAN536600 from Fairchild for...