1A fuse instead of 1/2A fuse: any problem?

Put a 2a or a piece of wire in there, then you won't have to worry about those wimpy shutdowns.

Oh, and I should have added - keep a fire extingusher handy

You can order those size fuses from most all the big electronic parts stores or maybe even you local electronic parts store or even Radio Shack. If it was a slow blow .5A you can use a 1A fast blow, but it is better to stay within the design. I have tried the HiFi Tuning Line fuses (very expensive for a fuse) and did not notice any change in sound. Might have been one but it is too small to tell for me.

Ezekiel makes a good point about "fast blow" vs "slow blow". I did need to replace a fuse at one point and Radio Shack did have them.

I don't need Radio Shak fuses.The whole point is to try Isoclean fuse which supposedly is the best there is.And yes,it cost 30 bucks too.