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  1. R

    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...
  2. R

    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!
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