Well that is a bunch of news, I think I’m going to go for a 10 fold excess rating as sinusoidal = good and spikes = very very bad even running stuff through a power conditioner (I can still hear the odd pop when a light goes on or off!).

I know I can run the computer on UK mains voltage witch takes 200w off the calculation and much of the stuff with wall warts I can buy new power supplies (down another 180w), so a 5KW transformer should be OK.

I will contact AED before parting with any more cash however all is well as we have a bunch of other US electrical gizmos that can make good use of this particular transformer!

Cheers mate !