** Yeah - the cct starts off in the 240V position and jumps down to the 120V setting if the output voltage is much too low.

That's what I thought but being in a 120 volt country never had to deal with it.

It's safer to have the setting locked to the AC voltage where you live - and not have it jump to voltage doubling cos of a short term voltage drop.

That makes perfect sense in a 240 country.

Here, it can't really hurt itself.

There are some high power amps here that need 240. They just can't run on 120. Those don't switch down.

Anyway yes, you are definitely better off with a switch.