[vcf-midatlantic] UK Atari STE on US via 240V transformer (50 vs 60 hz)?

Hi folks, I'm importing an Atari STE from the UK, that requires 240V. I have a 120V to 240V transformer, and was wondering if that would work, or would there be a problem because the UK's grid runs at 50 Hz while the US grid runs at 60 Hz. I plan to replace the internal power supply with a modern 120V solution, but wanted to test the STE out of the box before I replaced the PSU. Thanks! John