newbe needs help?

hi all
been reading most of the groups emails for about year now and have steadily been byeing the bits to build my cnc m/c but have hit a problem with the power surrply which is I don't know what parts to bye i.e. caps and rectifiers . the transformer I intend to bye is a toroidal type 1000va 11.25A 48V with the secondary winding at 500va . so my questions are what does VA stand for, what sort of rectifiers do need and what size and sort of capacitors do I need ,for any uk people out there I am hoping to bye these from RS so if you know any stock numbers would be most appreciated for all the boys in the USA , I don't mind byeing from there if you have any ideas all your help will be vary helpful

many thanks baz


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