Had a need for a low voltage power supply today with high current, and since it was after 530 and tommorrow being Sunday, I decided to build one. So I got a few parts that I had laying around and built it. Except for the 15 amp transformer, 50 amp bridge and 40,000 Ufd capacitor, I figure the parts would cost about 3 or 4 bucks. The supply is ROCK stable and variable from 3 volts to 18 volts. The supply is over voltage and over current protected as a bonus. See figure below.
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http://www.anatekcorp.com/ttg/tiptrick.htm#10%20amp%20Power%20Supply