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In Reply to: RE: Fuse choice and safety ? posted by Uncle Mike on April 24, 2016 at 16:04:04
The neat thing about AA is that many folks actually try to be and are helpful, but I realize I can't win em all. Now and then someone even actually benefits from one of my suggestions. Imagine that! Didn't get my answer from your reference UM. Tweaker
Edits: 04/24/16Follow Ups:
All we are told is that this is a DAC. Correct? And the original fuse is 5A. Yes?
Is it a slow-blow or fast-blow type? Why would anyone go out on a limb to say you can use a higher rated fuse than recommended, when doing so could be dangerous? Are you going to take the word of someone here and turn it into your own "suggestion"? Some of these aftermarket boutique fuses are not even UL-rated; that's bad enough. To then increase the current rating ad lib is rather foolish. To recommend it is even more foolish.
Why not just bypass the fuse entirely, if you're feeling lucky? (I definitely don't recommend it, by the way.)
Well Lew, I see your point about someone going out on a limb. On the other side there are electronics trained people here. I think the 2N3055 output is 15A. I'd have to check to be sure. It is not unreasonable to think there might be some more wiggle room with diodes almost 5 times the rating of the originals. It's a slow blow. Just thought I'd ask. If I was to not use a fuse at all I wouldn't have put this out. The purpose of the question was to not be reckless. I'm well aware of the no fuse at all option. Tweaker
Just because a device in the circuit is capable of 15A means pretty much nothing. You have to look at everytning in the circuit. For instance the power transformer may only be rated to handle 5A. If a winding especially the primary goes wrong you want that fuse blowing ASAP. This is a risk not worth taking.
I connected a power cord on an NAD amp and later an upgraded linear ps for my Squeezebox diectly to the power transformer primary. No switch, no fuse. That made a big difference. In both cases the power cords were plugged into something with a fused AC out for protection- one a power conditioner the other a regenerator.
ET
Edits: 04/26/16 04/26/16
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