Hello all,and Happy Easter...I am in the process of building a High amperage variable voltage regulated power supply.The regulated voltage should be adjustable from 14 to 20 volts DC,at 300 amps.The input voltage will be 24 Volts DC,able to handle the load.What I have built so far is a bank of about 15-20 2n3055 Transistors and a large Heat Sink and fan setup.This bank of Transistors is driven by 2 2n3055's,and that is driven by a regulator circuit.I built an LM317 regulated circuit the drives a TIP31,which in turn drives the two 2n3055,then on to the bank.When the whole circuit is not on full load it will regulate a load tester within +or- 3 Volts from input voltage,then the voltage will dramatically drop at around 200 amps to below 12volts.I have tried changing components,and even tried another type of regulator circuit with some success,however the voltage is no where's near where I want it to be.Any help and or design ideas would be much appreciated.......