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Fuse problem:cannot understand what i'm missing

Hello fellow Audiogoners.I need your help.
A year ago i replaced a stock fuse on my Krell SACD mk3 (slow blow 500mA 20 mm (small)) with Hi-Fi Tuning fuse.
I threw away that Krell fuse thinking that i can always buy one at Radio Shack.I did some changes in my system and decided to try how Krell would sound with a generic fuse through my system.I went to Radio Shack and bought a 4 pack of Slow Blow fuses (T 500mA 250V).They all burned down one by one as soon as turned the power switch on.Everything is OK when i put back Hi-Fi Tuning fuse with the same specs.The fuses that burned down were slow blow fuses,500mA .I cannot understand why they are failing but a Hi Fi Tuning fuse keeps working without a problem.Are there any other specs that i'm missing?Please,help me solve this dilemma.Thanks a lot!
overhang

Showing 1 response by herman

herman
2,282 posts
 
Are you sure you have the correct fuse? Perhaps the package is mislabeled, are the fuses marked 500mA SB? If it's a SB it should be a coil of wire and not just a straight piece of wire between the 2 ends.

I've bought a lot of fuses at RS over the years and never had a problem. They don't make them so it is highly unlikely that their definition of slow blow is different than others. Something else is going on.
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