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build it
I just finished my third copy of the ARRL HANDBOOK 28 volt power supply,
modified to 13.8 volts. I started with a 44volt 16 amp transformer purched for $5 at a , you got it, a farm show flea market.. Using a digital volt meter and a sharp tool I found the exact center of the output winding within a few hundredths of a volt. I cut the winding with a dremel tool and added two wires to parallel the windings , making a 22 volt 32 amp winding. Built the whole thing in a cabinet from a TV sweep generator. I used a different output transistor than the 3055s called for. I used a 30 amp version. With the sheetmetal work etc, I have abut 40 hours in it. Get out there and build.!!!!!!! I have ictures but can't figure out how to insert them. right clik image doesnt work Last edited by k9yli : 03-06-2009 at 12:19 PM. Reason: pictures |
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