Voltage question

Would a component from Japan that is rated 100 volts be safe to use here on 110-120 volts,

Safe? That's not the problem. The problem is you will be feeding the piece of equipment at a much higher voltage than the equipment was designed to be operated at. Will it work? Yeah,.... But you will shorten its' life.


General rule is + or - 10% of the manufacturer’s recommended voltage.
100Vac x 10% = 110Vac.

The average residential AC mains voltage in the US is 119Vac - 122Vac. 120Vac nominal probably being the most common.

The cheapest way to reduce the voltage to 100 volts is with a Buck auto-transformer.
.

no, get a simple transformer to step 120 down to 100v, they are easy to find. it's about the turntable's motor.

I've had fancy expensive one and inexpensive one, neither hum as was my concern. inexpensive one is both smaller and lighter, easier to find a place for it to go.

you might want to mark the TT cord 100v, so nobody makes a mistake with it in the future.

Perfectly safe. No problem.

What exactly is the kit you are thinking of though??

Lots of newer kit is multi-voltage.

 Its a cd player