[0-30V Stabilized Power Supply]

With the original design, using a lower voltage transformer (i will not obtain 30V but who cares!!!), i want to pus BD139, what modifications i need to do? What is the scope of Q1 in the original schematic? If i put BD139 and keep TL081, did i need to do modifications? What are those?

The recomanded opamps in the newer version is expensive in comparasion with TL081!

If i understand well, for 5A, i need 4 output transistors to keep up with the current, and a better rectfier!

[0-30V Stabilized Power Supply]

Hello. My power suplly work ok, till 2N2219 was blown.

Please recomand a replacement that can keep well hight currents without modifications or with minor ones. Please say what you tested and it works!

Thanks, Rares!