I own a sony icf sw 7600g short wave radio which worked perfectly until recently when I believe a battery may have leaked and now it is caput with nothing coming on ; dead dead ! is it fixable and can you advise place and approx cost

When a battery leaks it leak acid which can damage or ruin everything it touches. First how extensive was the leak? Was it just a bit or did it seep onto the circuit board? You can clean the terminals. Remember your dealing with battery acid. Do it over a metal can and brush the terminals with a small wire brush. (Don't touch your eyes until your finished and have thoroughly washed your hands.) Just like you would a battery terminal. Then when down to the metal again use a regular pencil eraser to finish the cleaning. You may try a drop of flux per terminal as well after using the wire brush. If a wire was negated then soldier a new one in. You can also use a small, dry, non soap impregnated SOS pad in place of a wire brush. Install new batteries and give it a try. If no acid ruined the circuit board it is just an issue of getting the terminals to run current through them again.