mihorn,
My post was in response to this part of your post;
That includes fuses in > 30~40 years old vintage gears. Switching the direction of the fuse, the electrical current takes longer time (and subtle) to hear the effect because many active parts have to react to the change of new current (unlike audio signal). In my experience, it usually took 1~10 minutes to hear.
AC current is not flowing through the fuse. Energy is, in the form of an electromagnetic wave.
I think if you guys that have experimented with fuse direction, and can hear a difference, it is hard to justify if one believes AC current flows back and forth though the fuse. If that was the case then the fuse would have to act as a diode in one direction to hear a difference. What other reasoning can you use?
If you use the theory, energy travels through the fuse in the form of an electromagnetic wave from the source to the load, then the next question is how could reversing the fuse make a difference?
Here is what herman posted again:
If you say the AC fuse blew because there was too much current flowing
through it everybody nods in agreement even though that isn’t true. If you
say the wire in the fuse melted because it got too hot after absorbing
energy from the electromagnetic wave people look at you like you are
insane and want to argue that vibrating electrons constitute current flow.
