Thanks for the replies. Yes, I measured across the entire. centre tapped, secondary. The mains here in Sydney is supposed to be 240V, although I haven't measured it myself. The Hammond transformers have two primary windings, which are designed to be connected in a variety of ways to accommodate various mains voltages. They do cater for 240V mains. Current capacity is no problem...I've identified a unit which may be suitable, which has 300ma available. More than enough. I'm pretty new to all this, it's a steep learning curve.