Please fix the following errors:
For the price of a dinner for three at Wendy's! DR series
I have had Astron and other power supplies in the past but recently wanted one that would cost less that 40 dollars and have good specs. Doing some research on the net I found the SUPERNIGHT 12 volt 30 amp 360 watt supply for 21.00 dollars shipped. Besides the basic specs it comes with short circuit protection, over-voltage and has an adjustable output up to 14 volts DC. It also has a fan that comes on automatically if the temp reaches 45 degree Celsius. The supply comes only with a terminal block and no AC jack.
I found an old 3-prong power cord lying around and wired up and saw it had a green LED to show it was working and putting at 12 volts. Next I needed an enclosure. Harbor Freight sells sturdy plastic ammo boxes complete with a carry handle and snap locks. This box would give me plenty of room to work with and allow air to circulate with a couple of drilled pinholes in the right places. Lastly some binding posts (red and black) and a digital 0-30 volt DC blue LED meter from All Electronics were ordered. I could have saved 8.00 and or fudged something from another junk piece of gear but I did not have anything to work with and I wanted it to look nice. So at this point my total in parts and PS is 32.00.
I drilled a hole to slip the power cord through, then tied a knot on the inside of the box to keep it from coming out or pulling on the wires. Then drilled holes for the binding posts and tightened them down with the supplied hardware. The meter will be added later when I decide placement. Once the power supply was inside I made the adjustment to the output voltage and was pleasantly surprised that it would go to 14.1 volts and by using the tiny potentiometer on the board, turned this back to 13.8 volts.
I am sure a lot of hams could have found suitable containers (bread box, Tupperware etc, and have the same parts I bought lying around and saved 10.00 bringing the total back down to 20.49.
You could also get elaborate with a on/off switch, which I still may add, maybe a lighted 12 volt one from your junk drawer and a fuse holder. Here are photos of the final project results. Total cost 37.58
Thanks for reading! KJ4DGE
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Wholesale 240W Din Rail Power Supply Factories The eHam.net Team, Revision 07/2020.