Circuit Diagram 138 Volt Regulated Power Supply Schematic Diagram

A 7812 positive 3 terminal regulator is used for the main regulation and this is followed by as many power emitter followers as needed for the current you require.

Circuit diagram 138 volt regulated power supply schematic diagram. The above diagram is a basic uninterupted power supply ups circuit. This circuit can be adaptedmodified for other regulated and unregulated voltages by using different regulators and batteries. This 138 volt 20 a regulated transformerless power supply. Regulated power supply block diagram.

20a transformer is very very expensive large in size and very heavy in weight. This is very important. The power supply circuit is shown in figures 1 and 2. I used 2n3771 devices 50v 20a 200w simply because i had a whole bunch of them in my junk box.

This power supply capable in delivers around 20amps at 138v. Theres a really good 138 volt 30 amp power supply circuit diagram in the arrl handbook with clear instructions on how to build it. The output from an ordinary power supply is fed to the voltage regulating device that provides the final output. Then this circuit would be great choice for you.

The voltage is adjustable and it even has remote voltage sensing which automatically compensates for any voltage drop that occurs between the power supply and the load transceiver. Remember to isolate the transistors from the chassisradiator of power supply box. The advantage to rolling your own power supply is that it teaches us how they work and makes it easier to troubleshoot and repair other power supply units in the shack. For a 15 volt regulated supply you may apply two 12v batteries connected in series it will.

I need the diagram of this power supply to repait my unit. Do you need high current power supply without heavy and expensive transformer. This is power circuit that has maximum current supply 22 ampere and output voltage 138 volt trimmed by p1. The circuit even has a current limiting feature which is a more reliable system than most.

The design is shown below. 2 x 15 volt 12 amps. 10 amp 138 volt power supply october 13 2010 the circuit will give us 10 amps 12 amps surge with performance that equals or exceeds any commercial unit. Build a 10 amp 13 8 volt power supply circuit diagram sometimes amateurs like to home brew their power supplies instead of purchasing one off the shelf at any of the major ham radio retail dealers.

Part list for 20 amp bdx33 based power supply. For lower read more. The transistors are not critical. This power supply is formy txrx radio i need 138 volts 20 amps according advertisement i have bought a new one nissei ps30swii quite cheap 95 but i want to get the old one repaired and to use in in my workshop.