georgehifi
3,098 posts 01-02-2018 12:03am
jea48
1 and 2 are good that have not been stressed by overloads or a high voltage transient event/s.
4 and 5 are clearly blown.
If your asking no. If your telling wrong.
They are the same fuse over time, and none are blown, all functional just shown the decay that happens over too many switch on surges. The parts you think are open circuit are in fact just white carbon build up on the resistance wire.
You can search for the origins, as I posted these up years ago, when all this fuse snake oil started.
Cheers George
Where’s the Beef?
https://www.youtube.com/watch?v=Ug75diEyiA0With out some technical information explaining the fuse through the five stages, shown in the picture, the picture is meaningless.
For all I know it is a picture where the fuse was subjected to an overloaded condition beyond its’ ampere rating for a period of time. Again supply the testing technical data for the picture.
I have never in my lifetime seen a fuse that tests good, measures continuity, that was installed in a circuit, operated within the manufacture’s ampere rating, that looked anything like the picture in the Link you provided. Have you? Has anyone reading this thread? Anyone??
I own audio equipment I bought in the 1970s, ( with original fuses), and the fuse element wire inside the glass fuse still looks the same to me. I have owned equipment from the 1950s, and 1960s where the fuse element wire inside the fuses didn’t look like the picture in the link you posted.
Jim