1980 vintage Polytone MiniBrute bass amp - 75W / 12" sp

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Bloke is

 
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tubaman5150
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Post by tubaman5150 »

Many guitar and bass amps use slow blow 250V 4 amp fuses. If you have the old fuse, it may be very lightly printed on the sides of the metal tips of the fuse.
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ThomasDodd
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Re: 1980 vintage Polytone MiniBrute bass amp - 75W / 12"

Post by ThomasDodd »

bloke wrote:What rating of fuse belongs in this recepticle? (It is unmarked, except for "fuse".)
Any line rating listed on the back? Should be some mention of the voltage, current and/or power requirements.

75W out could require a lot more power in, depending on the amp.
If it's 50% effecient, it would need 150W in, which at 120V, line current is 1.25A.
You need a slow-blow fuse to handle the peaks though.

Or you could just do the redneck thing and put a 5A fuse in.
If that blows too easily, go to 10A :)
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