I used early nineties, switchable Threshold separates while living on 220/240. Inside a compartment in the power amp's rear panel was an ingenious little circuit board that could be inserted four ways. Likewise the preamp's separate power supply had a rotating drum which displayed its voltage setting thru a cutout. The switchable gear is out there but sorry no specific recommendations. Here are some additional considerations:
1. If you take your USA configured turntable with you, moving to a country with 50Hz may make it play at the wrong speed.
2. If you get other gear that's switchable between 120 and 240, remember to halve the line fuse values whilst running it on 240. Fuses downstream from the transformer can stay the same.
3. When you get there, go to the hardware store for wall plugs to reterminate your power cords as necessary. Disassemble an existing, native plug to learn the power cord color codes.
4. Frys electronics has a compact converter/inverter that you can use on either side. It is about the size of an automotive battery charger or half a loaf of Wonder bread. It costs less than $50. I used one to power a USA configured Nakamichi cassette deck. The deck worked well on 50Hz. The converter/inverter performed quietly on 240 with the deck but was noisy while powering 240 hair straighteners in the USA.
1. If you take your USA configured turntable with you, moving to a country with 50Hz may make it play at the wrong speed.
2. If you get other gear that's switchable between 120 and 240, remember to halve the line fuse values whilst running it on 240. Fuses downstream from the transformer can stay the same.
3. When you get there, go to the hardware store for wall plugs to reterminate your power cords as necessary. Disassemble an existing, native plug to learn the power cord color codes.
4. Frys electronics has a compact converter/inverter that you can use on either side. It is about the size of an automotive battery charger or half a loaf of Wonder bread. It costs less than $50. I used one to power a USA configured Nakamichi cassette deck. The deck worked well on 50Hz. The converter/inverter performed quietly on 240 with the deck but was noisy while powering 240 hair straighteners in the USA.