Easy fuse question

[davoux]

My son has a Hiwatt DR103. It has startedblowing the mains fuse periodically. He is running a 3A fuse there. We got the unit from England where it used 240v. When I look at the schematic it says 3A and then in parenthisis it shows 6A. Based on P=IxE, it would take twice the amps in the USA to give the same wattage.

Am I safe to assume I could go up to the higher amp fuse? Would it still give the same level of protection the 3A did in England?

Thanks, John

[Tom Phillips]

My son has a Hiwatt DR103. It has startedblowing the mains fuse periodically. He is running a 3A fuse there. We got the unit from England where it used 240v. When I look at the schematic it says 3A and then in parenthisis it shows 6A. Based on P=IxE, it would take twice the amps in the USA to give the same wattage.

Am I safe to assume I could go up to the higher amp fuse? Would it still give the same level of protection the 3A did in England?

Thanks, John

You are on the right track. They intend you to use a 6A fuse when you set up the amp to run on 120V mains.
Tom

[Tom Phillips]

Forgot to mention.
It should be a slow blow fuse.
Here is a link to the owner's manual.
http://www.schematicheaven.com/newam...100w_dr103.pdf
It actually specifies a 6.3A fuse but I believe that you will do just fine with a 6A slow blow fuse which will probably be easier to find.
Note that the HT fuse valuse stays the same for 120V or 240 V operation. See the manual for more info.
Good luck,
Tom