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  1. Dave Laurenson

    0-30V Stabilized Power Supply

    Whether you use one, or multiple transistors, the total power of 114W must be cooled somehow.  Unless separate heatsinks are used for each transistor, then the problem still exists.  Remember, though, that it is 114W if the outputs are shorted together - that's pretty unusual, so the normal...
  2. Dave Laurenson

    0-30V Stabilized Power Supply

    Yes, I did realise the mis-type, and agreed that it wasn't right to operate so close to the maximum.  Do you have any comments regarding the use of the 150W rated transistor instead?  After all, we are talking about a margin of around 30%...
  3. Dave Laurenson

    0-30V Stabilized Power Supply

    Agreed - the 2N3055 is rated at 115W maximum, and as the voltage drop also depends on what the ammeter internal resistance will be, it shouldn't be running so close to its limit.  The hFE parameter of the 2N3055 is very loosely defined (as is the case with most BJTs), so one of the transistors...
  4. Dave Laurenson

    0-30V Stabilized Power Supply

    Hi All, I saw this post by Liquibyte, and decided to take up the challenge of offering suggestions.  First, I'd like to say that I've enjoyed looking through this thread, and am very impressed with the work that has been done here by Liquibyte, Audioguru and others.  I have made some...
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