Toast wrote:
I replaced the 2A, 250V fuse with a 3A, 250V and everything seems fine; it played beautifully for 40 min. Is this OK? Is there any chance of damage to the amp with the 3A fuse in?
Fuses are rated to protect circuitry. They should blow before anything else does - as a protection. They are a deliberate weakest link. If you put in a higher current fuse then something else in the circuit is being allowed to draw more power (potentially up to 50% more power in this case) than it should.
Think of the circuit breakers in your house. If the circuit is capable of handling 30a you don't want a 40a circuit breaker! That would allow the cable to be overloaded. It probably won't go up in smoke instantly, but it can be overloaded now because the circuit breaker will allow more current than the circuit is designed for. If you upgraded the circuit breaker because it kept on tripping then you did the wrong thing - you should have reduced the load (or put in heavier duty wiring).
So I'd get that amp checked out.