On 31/05/2026 15:53, John Heritage via vcf-midatlantic wrote:
Thanks folks! I have a spare step-up transformer. I just wasn't sure if providing the UK Atari STE a 240V / 60 Hz power source would be a problem as it's probably designed for a 240V / 50 Hz source.
Its a switched mode PSU so the first thing that happens is that the mains is rectified and used to charge a high-voltage capacitor. So I think it will be fine with 240v/60v. Really the usual cause of problems is running a US designed setup on 110v/50hz. Transformers efficiency depends on frequency, which is why a SMPSU which runs a kHz can have such a small transformer
On Sun, May 31, 2026 at 10:31 Wil Birkmaier <wil@birkmaier.org> wrote:
I have one I just pulled out the psu and rebuilt it with a modern 100 to 240 or something. The hz I believe is set by the tos.
Been a while don't remember but if you want I can tell you the PSU used, for some reason meanwell comes to mind.
On May 31, 2026 09:23, John Heritage via vcf-midatlantic < vcf-midatlantic@lists.vcfed.org> wrote:
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
Dave