High Voltage Regulated Power Supply Schematic

The power transformer has three secondaries.

High voltage regulated power supply schematic.

Here is the variable high voltage dc power supply circuit which we can customize the output voltage from 0 to 311vdc and it is protected the current over the limit that we define at about 100 ma. 720v at 120ma center tapped for the plate and screen supplies 6 3v at 3 5a for the tube filament and bias power supply and 5v at 3a not used. This project can cost less than 15 and you will be able to obtain upwards of 1000v and be able to adjust the output from 0 1000v. Lets make a high current power supply with lm317 voltage regulator which can supply upto 5 amp lm317 is one of the oldest most used and wonderful linear voltage regulators.

You may like these lm338 5a variable regulator better life with high current in same voltage 1 25v to 30v. Build a regulated high voltage power supply for capacitor charging or another high voltage application. For a transformer that can supply at least 30 amperes and voltage secondary coil should not be less than 18 volts. The universal power supply must operate from ac line voltage ranging from 90 to 264v 50hz or 60hz.

Since the 5v secondary is not used a little more current than 120ma can safely be drawn from the high voltage secondary. From all principles above we have circuits applications as shown in figure 4 if you want to add the ic lm338 enabling them to be higher current. High power dc regulator 4 20 volts 20 amps by lm338. The above universal power supply circuit provides a variable voltage between 3 to 30v the maximum current of 1 5a and addition of modules can provide a higher current.

The adjustable voltage regulator lm317 u1 offers short circuit.