Does it take a while for a new fuse to start working in an amp???
Squier Affinity Series Stratocaster
Epiphone G-400
Line 6 Spider
Dunlop Crybaby Wah

"Wish I Had This" Gear:
Guitars- G&L, Gibson, PRS
Amps- Egnater, Bogner
Effects- Fulltone, JHS, Eventide
Nope there pretty much an instant thing. You put it in flip the switch it will work or blow the fuse again.