From: peterxpercival@hotmail.com   
      
   Phil Allison wrote:   
   > Ralph Mowery wrote:   
   >   
   >   
   >>   
   >> All of that is well and good.   
   >>   
   >> However, is that going to be peak, average, rms or just what that the   
   >> origional question wanted.  Is there going to be a capacitor to smooth   
   >> out the voltage, or is the full wave rectified DC going to be used ?   
   >>   
   >> Lots of unasked questions in the origional question.   
   >>   
   >   
   >   
   > ** The original Q is a pile of utterly ambiguous drivel.   
   >   
   > If Q posters would simply reveal the PURPOSE of their question, ambiguity   
   would disappear and useful answers become possible.   
   >   
   > But no, they want to play at being smart and be in control the answers by   
   NOT revealing any such damn thing.   
   >   
   >   
   >   
   > ....  Phil   
      
   Oh dear.   
      
   I am looking at Fig 3.6 on p 42 of Marston's /110 operational amplifier   
   projects for the home constructor/.  The circuit depicted is that of a   
   power supply delivering 3-30V at 0-1A.  It is to be supplied with "+40   
   to 45V (unregulated)".  The text has nothing to say about where that   
   comes from.  I have decided to use a bridge rectifier attached to the   
   secondary of a transformer with 240(ish)V primary; and I wish to know   
   what secondary I need.   
      
   The "2amps" in my OP was a guess of mine that if the PS delivers 1amp,   
   then 2amps in would be more than enough.   
      
      
   --   
   "He who will not reason is a bigot;   
   he who cannot is a fool;   
   he who dares not is a slave."   
     - Sir William Drummond   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)