fast acting or slow-blow fuse for amp?

  • Thread starter Thread starter FALKEN
  • Start date Start date
oh and slowblow fuses are usually meant for cars. When the car (or whatever is powering up) powers up, a crapload of current bursts through the fuse, then lowers back down to the reguar amprage. Sloblo's are meant to be able to indure huge spikes of current, as long as it isn't for a long period of time.

Fast-acting fuses blow immediately if too much current runs through it.

I wasn't aware amps even used slowblows. I don't know too much about amps and electrics though....Would the slowblow fuse be the one right off the power line before the transformer?
 
dementedchord said:
WTF kinda amp was that??? the only tube transistor amps i've ever worked on used tubes in the front and solidstate out puts never the other way around.... and if you did build an amp like that i cant think of a way to overload the tubes to the popint of distroying an output tranny...

Music Man amps have the solid state preamp & tube power amp as well, and a 1/2 power tap on the tranformer also..
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antispatula said:
oh and slowblow fuses are usually meant for cars. When the car (or whatever is powering up) powers up, a crapload of current bursts through the fuse, then lowers back down to the reguar amprage. Sloblo's are meant to be able to indure huge spikes of current, as long as it isn't for a long period of time.

Fast-acting fuses blow immediately if too much current runs through it.

I wasn't aware amps even used slowblows. I don't know too much about amps and electrics though....Would the slowblow fuse be the one right off the power line before the transformer?
Click to expand...
Don't bother trying to generalize this. It varies all over the place. Where there will be surges as part of the load, they build it in. Motors, incoming mains, where ever. There is a hole range out there between the typical ones we see in amps, 'fast, faster, some with specific time/power curves.
 
can only say i've never seen one like that... the ones i have seen were like the hartke which uses a tube in the front then the rest is solid state... and anyhow a hybrid like that should be either capactive or transformer coupled and subsequently would not overdrive the output to that degree... (mostlikely caused by a dc'ing driver) YMMV
 
dementedchord said:
sorry i guess the guy's i've worked for were smart enough not to do this....
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Hey! I resemble that remark! ;^)
 
antispatula said:
oh and slowblow fuses are usually meant for cars.
Click to expand...

I have owned lots of cars and done electrical work on all of them, and I have yet to encounter a single slo-blo fuse in any of them. What you say is true about the way they work, but cars (the ones that I've known) don't use them. As a matter of fact, I've tried to buy slo-blo fuses for my amps at auto parts houses, and they never have them.

Slo-blo fuses are used for applications where there are big capacitors that charge up on powerup (like the filter caps in an amp) or high torque electric motors that pull lots of amps before they get moving.
 
ggunn said:
I have owned lots of cars and done electrical work on all of them, and I have yet to encounter a single slo-blo fuse in any of them. What you say is true about the way they work, but cars (the ones that I've known) don't use them. As a matter of fact, I've tried to buy slo-blo fuses for my amps at auto parts houses, and they never have them.

Slo-blo fuses are used for applications where there are big capacitors that charge up on powerup (like the filter caps in an amp) or high torque electric motors that pull lots of amps before they get moving.
Click to expand...

Or transformer inputs or..............

Any device that has a substantial inrush current on power-up.
 
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