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Home Brew And Tech Forum / build it
« on: March 04, 2009, 10:01:11 AM »
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
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