i blew a 250V BUS MDL 1/4 fuse in a mic pre. i am in Burundi (220v land) and can only find a fuse that says it is: BS 2950A 15A the different ratings systems confuse me. why no amp rating on N.A fuse? why no V rating on British Standard fuse? i am using a power converter to run it at 110V. can i use the fuse, or will i blow up my pre (it is an ART dual Tube MP, and perhaps deserves blowing up so i can justify an API...)?