Got one of these that cleaned up pretty nicely for its age! Unit is wired for 115V ac. Info has been had on how to rewire it for 230Vor 240V A/C. No info on the other hand has been found about a fuse change or is there no necessity for a fuse change? Can't find any thing on this subject; help please!!! Thank you, Vy72, C6ANI, Ric.