Goldsource STU-750 Step Up/Down Voltage Transformer Converter - AC 110/220 V - 750 Watt
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- Step Up/Down transformer converts 220-240 volts down to 110-120 Volts or 110-120 volts up to 220-240 volts. - Simultaneous 3-mode Output: 5V (USB) / 120V (Standard US outlet) / 220V (Universal outlet) - Four input voltages selectable: 110V/120V/220V/240V - All range fuse protection with two spare fuses included. - CE certified & 3-year manufacturers limited warranty.
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Made by one of the leading manufacturers in the industry, the Goldsource STU series step up/down voltage transformers offer you a safe, reliable, affordable & convenient solution to converting voltages from 110-120 volts up to 220-240 volts or from 220-240 volts down to 110-120 volts for both home use & industrial applications. \n\nThe STU-750 is rated at 750 watts maximum. It features a heavy-duty cord with a standard US 3-prong plug plus a free American to German outlet plug adapter. There are a total of three outputs on the front panel. Two are grounded outputs, one designated for 120 volts with a US standard outlet, the other for 220 volts only with a universal outlet. The last one is a 5V standard USB jack, a unique feature of the STU series & 1st in the industry. And most importantly, all three outputs can be used simultaneously & continuously. \n\nFor safety, its recommended by the manufacturer that the voltage transformers maximum power should be equal or greater than the power rating of your appliance multiplied by 1.5. For example, if you have an appliance rated at 100 watts, you will need to pick a transformer with a maximum power of 150 watts or greater.
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Most helpful customer reviews on Amazon.com
I was so scared to turn mine on when it arrived due to other reviews stating that theirs smoked up and smelled or made weird noises. So I followed the instructions.. behind the transformer is a small little plug like thingy (like a key kinda or pin) and you basically place it on whatever hole you needed as voltage. I placed it on the two holes that was for 110, plugged it in my outlet, then plugged my sterilizer on the transformer outlet that says 220 output (the larger outlet on the right) then I wore my rubber gloves (yes, I even turned mine on wearing rubber gloves), flipped the red switch and VOILA!! ITS ALIVE!!! Bwahahaha!
My transformer was very quiet.. Didn't even hear a hum.. I even placed my hand on top of the thing (after making sure I won't get electrocuted) and I didn't even feel any slight vibration.
I do think that the burning and smoking and loud noises might be due to other people buying a lower wattage transformer that couldn't handle the item's required wattage to perform. I was about to buy the cheapest transformer (same brand) until I read about the wattage thing. I admit it floored me... I didn't know what it was talking about. I didn't even know about voltage, people and now I have to learn wattage too?? Anyway, Just look either behind or below your equipment and it should tell you how much watts your equipment needs. Mine was 650 by the way.. According to the details on this thing, you have to multiple your wattage needed by 1.5 and that's the transformer you should buy. Well if I went with that, then I have to shell out more money to get the 1000 watts transformer instead *grumble* I should have really just freaking bought the US version *grumble*mutter* and as I said, it worked well with the 750 watts.. I don't think I'll be using it for other appliances at my place anyway but if you plan on double plugging this thing with different appliances then just add up the watts needed.
Oh yea, it also comes with another plug thing and a small ziplock that contains two small cylindrical light bulb looking things. You might miss the small ziplock if you're opening the box. I dunno what the bulbs are for.
ONLY CON: Short Cord. What's up with that?
The unit is smaller than I expected - I plugged it into the mains, plugged the PS3 into the UK power socket on the front, switched it on, and it all works
I leave it on for a few hours at a time and it runs very quietly (a very faint hum). I left it on overnight once while the PS3 downloaded content, and it was still running fine in the morning.
We have also used this with a food mixer we brought over from the UK.
Instructions were very clear - when it arrived I had to set it to transform from 110 to 240 - it was a simple matter of moving a pin on the back of the box.
It also came with 2 spare fuses
UPDATE - TWO YEARS LATER
This is still running really well. We switch it on every morning and then off again at night, but I don't think that's really necessary. If the house is absolutely silent you can notice a slight hum from this unit but otherwise no complaints. The UK PS3 is still using it every day as is our UK wireless router.
Some weird things to note:
1. The product is incredibly heavy. I knew it would be, because transformers get heavier as the wattage goes up: basic physics. Still, I think the tiny body makes the weight all the more surprising. The device occupies no more space than two rolls of toilet paper placed next to each other.
2. There is a little "selector plug" on the back of the device. By default it is in the 240V position. If you use it in the United States, change positions to 110V. The plug determines what voltage of current the device should expect. You ought to hear a satisfying click sound to know it's securely in place.
3. Two replacement fuses are bundled in a tiny zip-lock bag. They are easy to lose when you open the box if you aren't paying attention.
4. The fuse cover on the device has wonky bent plastic.
5. The device is made of metal and I suppose during shipping, despite the decent packaging, the device's weight meant that a corner of the body's metal got a bit bent.
Will update to reflect reliability over time.