replacing a 800mA fuse with a 1amp

atsnom · 8th January 2007, 07:37 PM

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.

Netlist · 8th January 2007, 08:26 PM

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

atsnom · 8th January 2007, 09:01 PM

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.

Netlist · 8th January 2007, 09:08 PM

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

atsnom · 8th January 2007, 11:04 PM

surely if i put a lower mA fuse it it will definetly blow ???

glen65 · 9th January 2007, 12:22 AM

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.

atsnom · 9th January 2007, 03:50 AM

thanks i will give it a go in the morning

8th January 2007, 07:37 PM	#1
atsnom diyAudio Member Join Date: Aug 2005	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.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Fuse housing melting but fuse not blowing, ppi amp	rawadia	Car Audio	21	2nd August 2008 10:39 AM
PTC instead of Fuse?	gearheadgene	Class D	4	8th April 2008 03:42 PM
Why main fuse and not rail fuse?	digital desire	Solid State	10	3rd December 2006 08:07 PM
amp rating for fuse and fuse holder?	riotubes	Parts	5	27th August 2006 03:10 AM
convert a 12VDC, 800ma wall wart to 22-24VDC, ~400ma	Anthrax	Power Supplies	3	9th May 2005 05:44 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

8th January 2007, 08:26 PM	#2
Netlist diyAudio Moderator Join Date: Jan 2003	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

8th January 2007, 09:01 PM	#3
atsnom diyAudio Member Join Date: Aug 2005	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.

8th January 2007, 09:08 PM	#4
Netlist diyAudio Moderator Join Date: Jan 2003	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

8th January 2007, 11:04 PM	#5
atsnom diyAudio Member Join Date: Aug 2005	surely if i put a lower mA fuse it it will definetly blow ???

9th January 2007, 03:50 AM	#7
atsnom diyAudio Member Join Date: Aug 2005	thanks i will give it a go in the morning

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)