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Amazon.com: VCT VT-500J - Japanese Step Up/Down Voltage Transformer Converts Japan 100 Volts To 110V OR Vice Versa - 500 Watt : Electronics
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Power Bright 2000-Watts Step Up/Down Converter 110/120-Volt - 220/240-Volt Voltage Transformer VC2000W - The Home Depot
WAZIPOINT Engineering Science & Technology: How do you know if a transformer is step up or step down?
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