13 8volt 20 Amp Power Supply Schematic

Only 0 35v drop at full load.

13 8volt 20 amp power supply schematic.

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. This power supply capable in delivers around 20amps at 13 8v. Let us see what we haveread more. There s a really good 13 8 volt 30 amp power supply circuit diagram in the arrl handbook with clear instructions on how to build it.

Not wanting to purchase a commercial unit which would cost about 150 i set out to build such a supply to power my ts 440s hf rig. 20a transformer is very very expensive large in size and very heavy in weight. Voltage can be set between 12 3 and 15 volts. This 20 amp variable power supply varies its output voltage from 1 5 to 15 volts and is based on the well known variable voltage source configuration where only the lm317 voltage regulator is used see red box on the diagram.

This psu has been especially designed for current hungry ham radio transceivers. Most readers of this magazine are only interested in a 13 8 volt 20 amp p s u. The transformer and diodes turned out ample enough to increase the final capacity to 30 amps and more. Parts widely available and calculated way over the maximum load of interest.

Heavy duty power supply 13 8 volt 20 or 30 amps continue. 20 amp variable power supply using lm317. 10 amp 13 8 volt power supply 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. This 13 8 volt 20 a regulated transformerless power supply.

Which is suitable for powering the average solid state hf rig or 100 watt vhf uhf linear. For lower currents a separate current limiting output capable of 15ma up to a total of 20a has been added. For lower currents a separate current limiting output capable of 15ma up to a total of 20a has been added. Regulated dc power supply short circuit safe and with current limiter.

Let us see what we have got here. Only some voltage limitations kept it from reaching a full 40 amp icas capacity. The initial requirement was a 13 8 volt regulated supply capable of 20 amps continuous output.