Sorry guys, having more trouble with this. Well, a similar thing.
I've got something that runs on 115V and is rated at 24W. I don't know what sort of current it pulls.
I bought a step-down transformer from 240/250V to 110/120V and it works for the most part. It's a guitar amp, and when I turn the volume up beyond a certain point the power cuts out for a moment, then comes back on. I've asked around and have been told it's almost certainly a fault of the step-down transformer I'm using, which is rated at 50W, but I have no idea how much current it's capable of handling (I didn't know it'd be an issue).
So how do I go about finding a transformer that won't cut out? What specs do I need to know about the device I'll be running and the transformer I want to be running it off?