Fuse question

Fuse question

Posted by henryrancourt@att.net (A) on September 22, 2016 at 08:41:52

Is anyone building amps based on LM3886 or LM4780 ICs? I ask because I am and have a fuse question. I'm using an Antek AS-3224 300VA transformer at 115 Vmains. Using the simple equation, fuse = 3 X VA/Vmains, I get 7.8A. That seems a bit high based on what I've read in other posts.

On a slightly different fuse topic, my Aragon and McCormack have a 10 or 12 A slo-blo at the IEC but also have lower amperage fast-blo fuses on the rails. So far the amps I've seen, based on the ICs I mentioned, don't have rail fuses. Why is that?

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Topic - Fuse question - henryrancourt@att.net 08:41:52 09/22/16 (22)

RE: Fuse question - Tweaker456 19:35:15 09/22/16 (0)

RE: Fuse question - jea48 11:23:10 09/22/16 (20)

RE: Fuse question - Tweaker456 10:57:54 10/04/16 (1)

RE: Fuse question - jea48 10:10:49 10/08/16 (0)

RE: Fuse question - henryrancourt@att.net 11:47:17 09/22/16 (17)

RE: Fuse question - Blackdog 13:34:27 09/22/16 (16)

+1 nt. - jea48 14:08:05 09/22/16 (15)

RE: +1 nt. - henryrancourt@att.net 14:35:34 09/22/16 (14)

RE: +1 nt. - Tweaker456 16:33:06 09/22/16 (12)

primary and secondary fuses - Lew 07:04:05 09/23/16 (10)

RE: primary and secondary fuses - Tweaker456 10:16:23 09/23/16 (9)

RE: primary and secondary fuses - Lew 13:21:20 09/23/16 (7)

RE: primary and secondary fuses - Tweaker456 01:06:48 09/24/16 (6)

Haven't we gone over this before? - Cougar 08:15:54 10/04/16 (2)

RE: Haven't we gone over this before? - Tweaker456 10:47:41 10/04/16 (1)

RE: Haven't we gone over this before? - beautox 12:47:43 10/04/16 (0)

RE: primary and secondary fuses - Lew 08:24:21 09/24/16 (2)

RE: primary and secondary fuses - Tweaker456 02:15:00 09/30/16 (0)

Lew, T456 doesn't understand AC mains - Timbo in Oz 01:44:38 09/25/16 (0)

RE: primary and secondary fuses - JKT 11:52:37 09/23/16 (0)

RE: +1 nt. - jea48 17:03:12 09/22/16 (0)

I agree with what Blackdog said in his post. nt. - jea48 16:22:24 09/22/16 (0)

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