Those are interesting thoughts, Mapman. While fuse seating/contact integrity and changes in fuse parameters occurring over time would seem unlikely to result in significant sonic differences, any other conceivable explanation would also seem to be unlikely.
But in particular, regarding possible increases in resistance and consequently in voltage drop that might occur over time, keep in mind that while increased resistance would result in increased voltage drop, it would also result in increased power dissipation in the fuse, and therefore in increased internal heat, and therefore probably also in premature failure of the fuse. Also, degradation of performance over time would seem to fly in the face of the general consensus that hundreds or (some would say) thousands of hours of use is likely to improve the performance of a component, not degrade it.
A couple of experiments that would be of interest, though, if anyone is so inclined, would be to (a)replace an older stock fuse with a new inexpensive Littelfuse or Cooper Bussmann fuse of the same rating; and (b)temporarily, for experimental purposes, replace a stock fuse with an inexpensive Littelfuse or Cooper Bussmann fuse of MUCH higher current rating, which in terms of resistance would be essentially equivalent to eliminating the fuse altogether.
Regarding graphene, I have no particular knowledge.
Best regards,
-- Al
But in particular, regarding possible increases in resistance and consequently in voltage drop that might occur over time, keep in mind that while increased resistance would result in increased voltage drop, it would also result in increased power dissipation in the fuse, and therefore in increased internal heat, and therefore probably also in premature failure of the fuse. Also, degradation of performance over time would seem to fly in the face of the general consensus that hundreds or (some would say) thousands of hours of use is likely to improve the performance of a component, not degrade it.
A couple of experiments that would be of interest, though, if anyone is so inclined, would be to (a)replace an older stock fuse with a new inexpensive Littelfuse or Cooper Bussmann fuse of the same rating; and (b)temporarily, for experimental purposes, replace a stock fuse with an inexpensive Littelfuse or Cooper Bussmann fuse of MUCH higher current rating, which in terms of resistance would be essentially equivalent to eliminating the fuse altogether.
Regarding graphene, I have no particular knowledge.
Best regards,
-- Al

