125/250V fuse for very old dual channel rectifier?

[L.J.]

Seems I'm now the new owner of a very early rectifier mentioned already in several topics. Ofcourse I really want to take care of historic piece of equipment. So I checked the fuse in this amp and there's now a 4A fuse voor 250V. I live in europe so a 4A sloblo fuse for 125V is hard to find. Does anybody know if a 4A 250V fuse could be dangerous for the amp. Should a 2A/250V be a solution.

 

[pgrudge]

I also have a really early dual rectifier, live in europe, and i have a 2A slo blo in mine. I've had a spare fuse ready for 10 years, but have never blown the fuse still! And i promise, i've been playing loud!