I highly recommend this product and its manufacturer. I bought the ULT850 (850W) to use up to 650W at 220Vrms 50Hz. I chose it because (1) it has a toroidal core, (2) it is very well assembled inside, (3) it is from the USA and (4) its design is compact and simple.
I received it quickly, and in the box I found exactly what was advertised. I tested it with no load and with a moderate load (with oscilloscope). It is quiet and delivers the pure sine wave voltage it should deliver.
Some buyers complain because it does not transform the FREQUENCY. It is true, but no transformer does that !!! To buy this type of product you have to have the minimum knowledge. If not, you have to ask someone else to make the purchase.
Other buyers complain because it is EXPENSIVE . . . THAT IS NOT TRUE ! Just look at other similar ones. In particular, it is important to consider the quality of the materials and the way it is assembled. This product has an excellent quality-price ratio.
Finally, there are those who say that it is NOISY. It's hard to believe that, because the magnetic field leaked by a toroidal core is minimal. To make it noisy, it would have to have a fracture in the ferrite core. That could happen after a heavy hit, but the casing would also have to be damaged. Therefore, if the transformer is noisy, surely the core is fragmented and so you should contact the manufacturer, Kriëger, who have EXCELLENT CUSTOMER SERVICE.
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This item: Krieger 1700 Watt Voltage Transformer, 110/120V to 220/240V Step Up Step Down Voltage Converter with AC Outlets, MET Approved Under UL, CSA
$193.97
Get it as soon as Sunday, Jan 26
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$105.99
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$69.99
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Through innovative technologies and constant refinement of our product line, KRIËGER establishes the benchmarks in the contemporary power industry. Our unwavering commitment to meticulous attention to detail and rigorous standards ensures the outstanding reliability that distinguishes KRIËGER, meeting the high expectations.
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This Item  Krieger 1700 Watt Voltage Transformer, 110/120V to 220/240V Step Up Step Down Voltage Converter with AC Outlets, MET Approved Under UL, CSA | Recommendations  |  |  |  |  | |
| Price | $193.97 | $59.99 | $167.97 | $89.99 | -7% $97.99 List: $104.99 | $34.71 |
| Delivery | Get it as soon as Sunday, Jan 26 | Get it as soon as Sunday, Jan 26 | Get it as soon as Wednesday, Jan 29 | Get it as soon as Sunday, Jan 26 | Get it as soon as Monday, Jan 27 | Get it Jan 27 - 30 |
| Customer Ratings | ||||||
| Sold By | TECHBUY | Yinleader-us | TECHBUY | Yinleader-us | Amazon.com | AudioPoutine |
| power source | Corded Electric | Corded Electric | Corded Electric | Corded Electric | Corded Electric | Corded Electric |
| maximum frequency | 60 hertz | 60 hertz | 60 hertz | — | 60 hertz | — |
| minimum frequency | 50 hertz | 50 hertz | 50 hertz | — | 50 hertz | — |
| specification met | UL | — | CSA, UL | NEMA | CE, FCC, ETL | — |
| model number | ULT1700 | VTF-1000VA | ULT1150 | 4000W | ST-5000VA | ST-100 |
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Excellent Quality
This product is very well made and does not heat up any at all while using it to run my exercise plate which runs on 230 volts.
Top reviews from the United States
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- Reviewed in the United States on January 31, 2021Style: 850 WattsVerified Purchase
I highly recommend this product and its manufacturer. I bought the ULT850 (850W) to use up to 650W at 220Vrms 50Hz. I chose it because (1) it has a toroidal core, (2) it is very well assembled inside, (3) it is from the USA and (4) its design is compact and simple.
I received it quickly, and in the box I found exactly what was advertised. I tested it with no load and with a moderate load (with oscilloscope). It is quiet and delivers the pure sine wave voltage it should deliver.
Some buyers complain because it does not transform the FREQUENCY. It is true, but no transformer does that !!! To buy this type of product you have to have the minimum knowledge. If not, you have to ask someone else to make the purchase.
Other buyers complain because it is EXPENSIVE . . . THAT IS NOT TRUE ! Just look at other similar ones. In particular, it is important to consider the quality of the materials and the way it is assembled. This product has an excellent quality-price ratio.
Finally, there are those who say that it is NOISY. It's hard to believe that, because the magnetic field leaked by a toroidal core is minimal. To make it noisy, it would have to have a fracture in the ferrite core. That could happen after a heavy hit, but the casing would also have to be damaged. Therefore, if the transformer is noisy, surely the core is fragmented and so you should contact the manufacturer, Kriëger, who have EXCELLENT CUSTOMER SERVICE.
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Top reviews from other countries
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Pusch, H.Reviewed in Germany on October 7, 2023
Solide Stromversorgung
Style: 350 WattsVerified Purchase -
Francisco Javier GocheReviewed in Mexico on April 19, 2021
Muy buena calidad de materiales y funcionamiento
Style: 350 WattsVerified Purchase
