A professional power supply can be purchased second hand from eBay, or you can buy a new one. Ralph at Spektrotek has tested this power supply: YK-AD2003, up to 200 volts and 600 watts. It is protected against short circuits, overload and overheating. This is the power supply I use myself.
Price: US$220 + freight from China.
Supplier: Yucoo, http://www.ykpowersupply.com (this particular model is not listed on their website)
To purchase: contact Ms Molly Gao, molly.gao@ykpowersupply.com (If you reference this site, she will know what you will be using it for) Please state desired input voltage 120/220. Payment is quickest through bank transfer. This is a trustworthy company, I have paid by bank transfer on two occasions and so have others.
Pros: Compact, high quality, easily adjustable voltage (and current). Great aftersales support.
Cons: Extremely noisy fan that spins up every few minutes to cool the heat sinks. It spins up for about 10 seconds and then not for a few minutes until sufficient heat has built up again. You cannot expect to sleep with this in the room, or the next, it sounds like a small jet engine. Also, this power supply requires a 16 amp wall socket if you’re on 220 volts, 10 Amps will NOT suffice. Please read this page for explanation. If you need repairs, it may be costly to ship it to China and back.
Apart from the intermittent fan noise, I am happy with this power supply. Ms Gao at the supplier has also been very helpful with any aftersales questions.
This power supply has screw terminals on the back for the power out connection.
