For ratings of above 600 ma or so, you have to go to a table top type power supply. There are very few small wall-box type supplies that are manufactured that are rated above 600 to 800 ma.
Most of the electronic distributors sell table top 12 Volt supplies. They are regulated, and the smallest models start with about a 3 Amp rating and up to a large amount.
As long as the voltage to the load is correct, the load will draw the current that it needs. A 3 Amp regulated supply will work very nicely with a load that is averaging below 2 Amps.
Jerry G.
======
"Gussie Finknottle" wrote in message
news:a8b6a528.0411210502.44e12e15@posting.google.com...
> Hi,
> Probably a dumb question,... but I'm trying to locate a suitable mains
> adapter. Currently battery powers (4 x D Cells) the external power
> inlet is marked as 6v, 1.8a. However, all of the regulated PSUs I can
> find are < 600ma. does this mean I'm stuck with using batteries?
>
> Thanks in advance,
> G.