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A Fuse question

I just purchased a Magnum Dynalab Integrated Amp model #MD 308
I always check fuses for correct value before using.
This unit states on the back "3AG fuse " however it does not state the amperage
The fuse that is in it says : 250 v.... 4A
I checked manual to verify the correct fuse amperage is in it ( 4 amp ? ).....but manual does not 
indicate amperage!
Does anyone have this info I am seeking. 
Perhaps an owner of this amp could check and verify for me.
Thank you 
rocky1313
oldhvymec
5,101 posts
 
3AG is a 3 amp slow blow fuse.

4A is probably a fast blow. Single wire or one coiled around the other, kinda looks like a spring... That is a slow blow..

The straight wire fast action fuse..

Regards
gs5556
1,242 posts
 
Why not call MD directly and ask? 
georgehifi's avatar
georgehifi
10,312 posts
 
If it is 3amp and doesn't blow, then it's going to protect better than a 4amp one will.

Cheers George
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