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Old 8th January 2007, 07:37 PM   #1
atsnom is offline atsnom  United Kingdom
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Default replacing a 800mA fuse with a 1amp

The fuse in my kenwood amp has blown, its a 800mA fuse, im wondering if its safe to replace it with a 1amp fuse as this is all i have at home and id really like to listen to some music now.

I can get to the shops tommorrow and get a pack of 10 for £1 so if im going to do any damage by replacing it with a 1amp fuse I can wait.

I wasnt sure which sub section of the forum this belongs to so i put it here, hope thast ok.
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Old 8th January 2007, 08:26 PM   #2
Netlist is offline Netlist  Belgium
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If you knew for sure that nothing is wrong with the amp and the fuse died, well, just because we all die some day, you could do the 1A try-out till tomorrow.
But in most cases, fuses blow for a reason.
It's against all logic to tell you its safe without knowing why the fuse blew. Just like telling someone who can hardly swim to dive in a deep pool. But then, one can drawn in a glass of water.

Also, is it the mains fuse or speaker protection or...?

/Hugo
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Old 8th January 2007, 09:01 PM   #3
atsnom is offline atsnom  United Kingdom
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Its not the mains fues, Ive opened the amp up and taken the transformer out, on the underside the are 4 fuses.

3 are fine, 1 is clearly blown. they are all made of glass and i can see the wire has a break in the middle with a small lump on the end of each break where its melted.
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Old 8th January 2007, 09:08 PM   #4
Netlist is offline Netlist  Belgium
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Go and buy 630mA and 800mA fuses tomorrow.
Replace with 630mA. If it blows, something is wrong.
If you have no experience, take your beloved amp to a good service tech. If it doesn't replace with 800mA and celebrate with a nice glass of wine.

/Hugo
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Old 8th January 2007, 11:04 PM   #5
atsnom is offline atsnom  United Kingdom
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surely if i put a lower mA fuse it it will definetly blow ???
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Old 9th January 2007, 12:22 AM   #6
glen65 is offline glen65  United States
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Quote:
Originally posted by atsnom
surely if i put a lower mA fuse it it will definetly blow ???

The normal operating current will be much less than 800ma.
So you can use the 630ma fuse as a test if it doesn’t blow then
you know the rest of the circuit is ok. If it pops the 630 right off
the bat then you know there’s a problem in the circuit someplace.
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Old 9th January 2007, 03:50 AM   #7
atsnom is offline atsnom  United Kingdom
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thanks i will give it a go in the morning
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