This is a replication of a circuit i found on the internet! I used a 250V to 17V center tab transformer and 2 x 2N3055 transistors. With a 9 Watt load the input current was around 400mA.
Important notice: This circuit is experimental only. Clearly it's not an efficient way of converting DC to AC. For many good reasons, please don't use it in any real life application!