|Item model number||STU-2000|
|Item Weight||24 pounds|
|Product Dimensions||9 x 6 x 8 inches|
|Item Dimensions L x W x H||9 x 6 x 8 inches|
Goldsource STU-2000 Step Up/Down Voltage Transformer Converter - AC 110/220 V - 2000 Watt
|Price:||$89.95 & FREE Shipping|
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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
- CE certified & 3-year manufacturer’s limited warranty
- For more detailed information, please read the description below
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Made by one of the leading manufacturers in the industry, the Goldsource ST 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. The ST-2000 is rated at 2000 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 two grounded outputs on the front panel, one is designated for 120 volts and the other is for 220 volts only. They both are standard US outlets and can be used simultaneously. For safety, it's recommended by the manufacturer that the voltage transformer's 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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There are two types of converters that serve the purpose this converter is serving - transformer based and solid state. If possible, always go for the transformer based because they will give you pure sine wave output which is safe for all types of electronics. The solid state converters are producing all sorts of modified output (not pure sine wave) that is not safe for sensitive electronics.
Now I'd like to comment on some of the complaints that I read here that I'm not sure are quite correct:
1. The converter is running too hot. When current is passing through wires, there are always loses and they manifest themselves mostly as heat. This is basic physics. So the more current you push, the more heat you'll get. Running the transformer too close to its limits is never a good idea (nor it is safe). As general rule of thumb when buying a converter, make sure it is rated at least for 30% more than the max load you intend to use it for.
2. The converter is noisy. Production of noise in transformers is also basic physics. It is caused by a phenomena called magnetostriction - when you magnetize a ferromagnetic material (such as iron for example), it expands and when you demagnetize it, it contracts back to its original form. The alternating current from you power outlet is causing constant magnetization/demagnetization of the ferromagnetic core of the transformer which causes a humming noise. You cannot avoid this. There is a standard (NEMA ST-20) that mandates what are the acceptable noise levels for different transformer's power ratings and for under 10kW this level is set to 40dB. Mine STU2000 is far below this level.
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Spare your money and health and avoid buying it.
Amazon should have a negative rating option for this kind of @!&$%@#
That being said there is a quite loud phasing sound that is not easily ignored. I have used it occasionally for:
A 220v laminating machine (in an office the phasing sound is very distracting)
A 220v running machine (headphones on - no problem)
A 220v bench grinder (ear protection means no problem)
i wouldn't purchase this item for running media/office based equipment. the noise is just too intrusive but for power tools or where you will be blocking ou the sound it works just fine.
Most recent customer reviews
It did its job from the first day, and after 4 continuos years of use it is still on duty!