My wife moved here from the UK... she brought with her a unit called a
"hostess trolley" it is used to keep food warm before serving. She
loves it but it's a 220/240 volt unit.

We've tried running it with a converter and that didn't work.

We've re-wired it for a 220 volt US plug and that didn't work.

So, it must be a problem with 60 / 50 hertz.

Anybody have an idea about what else we could try to make it work in
the States?

Bob