Yep, u are correct Gav.I just had a look on the back of my Star Trek Voyager machine and it says 110 -120 VAC/ HZ 50 - 60/ 3 amps. Thats why the converter worked in this application but not for the new Sterns. Surely, there must be a way around it.  What has ANT (Tony) done then to overcome the firmware issue ? Interesting, it must run somehow ?

I wonder if the difference between 50 and 60 HZ would be picked up or not, every time, every new Stern USA machine.