2. misc-audio
  3. 166612-1565

So done with audiophile fuses

The journey started with a medium priced ($50) fuse in my power supply.  A failed rectifier tube blew that one out.  Not a fuse problem.  Next up was a blue fuse in my pre amp.  It blew and was not caused by a pre amp problem.  Apparently they sometimes are more sensitive and it was replaced by an orange fuse two values higher.  Things were going along fine.  I replaced the pre amp with a newer version of the pre amp and it has the same fuse value.  Five months latter (today) I turn on the pre amp and nothing.  it's a five month old pre amp so I suspected that it was the fuse.  Sure enough, I replaced it with a ceramic Littelfuse of the lower correct value it works fine.  No more wasting my money on unstable fuses for me.     
goose
jhills
610 posts
 
@sugabooger The job of a safety fuse in a component is to protect the cord that is connected to that unit ???

The current is flowing from the input end of the fuse to the output end of the fuse. When there is a problem or a short in the component it causes an amperage surge that blows the fuse. When the fuse blows it stops the current at that point, hopefully preventing further damage to the component. Unless the home circuit breaker is tripped or the cord is unplugged there is still power to and through the cord, it just has no place to go, so current into the component is stopped. Stick in another fuse and unless you’ve solved the problem, it too will blow....Jim

edgewound
259 posts
 
If the component develops an internal short and no fuse is present to melt and break the circuit, the short can connect to the wall outlet through the power cord.

sugabooger
89 posts
 
Jhills, safety requirements for most equipment includes a fuse or equivalent unless there in innate current limiting. We are talking things like UL. That fuse is to protect the cord from overheating. The equipment if safety approved or at least designed properly is already in a fire resistant enclosure where needed.
mitch2
3,694 posts
 
I knew somebody would come up with a justification for oversized power cords.😎
clearthink
1,421 posts
 

sugabooger"safety requirements for most equipment includes a fuse or equivalent unless there in innate current limiting. We are talking things like UL"

That is not even slightly, vaguely, or remotely how it works you will not find UL listings on the typical audio component unless it is made by one of the giant major manufacturers such as Sony, Panasonic, or Phillips.
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