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1. [AMPS] Fuses (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 22 Mar 1999 14:37:38 -0000; One question for discussion. Is a glitch resistor in the HV preferable to a suitable fuse? (I don't mean a 1-1/4 inch glass fuse) Or is a fuse a desirable addition to a glitch resistor? Or is it unne; /archives//html/Amps/1999-03/msg00549.html (7,431 bytes)
2. [AMPS] Fuses (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 22 Mar 1999 08:38:54 -0800; ? A glitch resistor that disintegrates during a hv flashover, can not fulfill it's primary job of limiting current because, as it disintegrates, a metal-vapour arc takes place across the glitch-R. .; /archives//html/Amps/1999-03/msg00556.html (8,043 bytes)
3. [AMPS] Fuses (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 22 Mar 1999 17:08:08 -0000; 40swg (0.0048 ins dia) wire fuses at about 2 amps. Suspended between suitable supports, it should go in well under 2millisecs, thus reducing the energy dissipated in the tube. Then it has to be repla; /archives//html/Amps/1999-03/msg00558.html (8,090 bytes)
4. [AMPS] Fuses (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 22 Mar 1999 10:22:05 -0800; ? What of the ensuing Cu vapour arc that exists as the wire separates? Metal-vapour arcs have a v drop of roughly 15v. // A friend of mine performed an antenna experiment with a eight-foot wooden st; /archives//html/Amps/1999-03/msg00563.html (9,358 bytes)
5. [AMPS] Fuses (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Tue, 23 Mar 1999 02:05:46 +0000; Peter, I have been using 40 ga. (or thereabouts) wire as a HV fuse on my tetrode amps for many years. In every case when the fuse was installed, there was no damage when the bang occurred. Replace th; /archives//html/Amps/1999-03/msg00569.html (8,387 bytes)
6. [AMPS] Fuses (score: 1): Author: w4eto@rmii.com (Richard W. Ehrhorn); Date: Tue, 23 Mar 1999 11:29:21 -0700; I never (knowingly, at least) experienced a "Rocky Point bang" until I began working external-anode, ceramic-metal tubes, Larry. First the 3CX1000A7/ 3CV1500A7, then 8877, 8874, 3CX800A7, 3CPX5000A7/; /archives//html/Amps/1999-03/msg00585.html (9,843 bytes)
7. [AMPS] Fuses (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Wed, 24 Mar 1999 01:45:59 +0000; Dick, Thanks for that input. It seems your data parallels my more limited experiences. One has to wonder what the differences really are. A '30's vintage 813 surely does not have the metallurgy or pr; /archives//html/Amps/1999-03/msg00589.html (8,506 bytes)
8. [Amps] Fuses (score: 1): Author: "Carol Richards" <n2mm@comcast.net>; Date: Thu, 6 Jan 2011 19:43:34 -0500; In the last contest one of the fuses in my Alpha 78 blew. Actually it became extremely hot and transferred the heat to the cap of the fuse holder. I managed to really burn my fingers. Nevertheless, I; /archives//html/Amps/2011-01/msg00047.html (6,773 bytes)
9. Re: [Amps] Fuses (score: 1): Author: "Mike" <noddy1211@sbcglobal.net>; Date: Thu, 6 Jan 2011 17:11:03 -0800; Like most companies they probably use what was cheap and available at the time, I would not worry what they use just fit the correct rated fuse. I have found that slow blow fuses tend to get hot is s; /archives//html/Amps/2011-01/msg00048.html (7,873 bytes)
10. Re: [Amps] Fuses (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Thu, 6 Jan 2011 20:12:01 -0500; Most likely ceramic fast blow and they should be specified in the manual. Mouser and others carry them, be sure to get the 250V rated ones. Carl KM1H _______________________________________________ A; /archives//html/Amps/2011-01/msg00049.html (7,891 bytes)
11. Re: [Amps] Fuses (score: 1): Author: "Vic, K2VCO" <vic@rakefet.com>; Date: Thu, 06 Jan 2011 20:14:54 -0800; You can also get some values of 250v ceramic fuses at Home Depot, etc. They are used in microwave ovens. I agree that slow blows are not likely to be correct for an amplifier -- they are very slow an; /archives//html/Amps/2011-01/msg00051.html (8,780 bytes)
12. Re: [Amps] Fuses (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Thu, 06 Jan 2011 21:18:00 -0800; ORIGINAL MESSAGE: REPLY: I would replace the fuse holder too. To get that hot, there probably was a poor contact between the fuse and the holder, causing a high resistance connection and thus overhea; /archives//html/Amps/2011-01/msg00052.html (7,715 bytes)
13. Re: [Amps] Fuses (score: 1): Author: "Roger (K8RI)" <sub1@rogerhalstead.com>; Date: Fri, 07 Jan 2011 00:29:40 -0500; I've noted a number of fuse holders that appear to be made of that same cheap thermal plastic people complain about in the mini din connectors. Once hot the plastic softens, the spring pushes the fus; /archives//html/Amps/2011-01/msg00053.html (8,016 bytes)
14. Re: [Amps] Fuses (score: 1): Author: "Jim W7RY" <w7ry@inbox.com>; Date: Thu, 6 Jan 2011 23:07:14 -0800; I bought some at my local farm supply store, WILCO. I believe Home Depot has them too. They are labeled as microwave oven fuses. Available in both 15 and 25 amp. They are a dark brown/gray. They are; /archives//html/Amps/2011-01/msg00054.html (8,825 bytes)
15. Re: [Amps] Fuses (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Fri, 7 Jan 2011 08:20:25 -0500; Agree, fuse holders are a common failure point in many of the amps that come in here for service. I replace them with a rugged mil spec type. Carl KM1H _______________________________________________; /archives//html/Amps/2011-01/msg00055.html (8,200 bytes)
16. Re: [Amps] Fuses (score: 1): Author: "Sam Carpenter" <sam@owenscommunication.com>; Date: Fri, 7 Jan 2011 09:25:04 -0500; Tessco online or Granger should have or can get any value made. There are a lot of them being used in Fixed Equipment from Motorola. About anything that is High Duty Transmitting equipment is using t; /archives//html/Amps/2011-01/msg00057.html (10,563 bytes)
17. [Amps] Fuses (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Fri, 7 Jan 2011 07:13:48 -0800; You can also get some values of 250v ceramic fuses at Home Depot, etc. They are used in microwave ovens. I agree that slow blows are not likely to be correct for an amplifier -- they are very slow an; /archives//html/Amps/2011-01/msg00060.html (8,604 bytes)
18. Re: [Amps] Fuses (score: 1): Author: "Paul Kraemer" <elespe@lisco.com>; Date: Fri, 7 Jan 2011 09:30:36 -0600; The fuse you want is Buss ABC type like ABC 25 for a 25amp etc. Ceramic, 250volt. I've had good luck with several ebay stores that have them (new) along with free shipping. Sold in lots of 10 usually; /archives//html/Amps/2011-01/msg00061.html (12,201 bytes)
19. Re: [Amps] Fuses (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Fri, 7 Jan 2011 10:45:07 -0500; Just dont over fuse. The usual 1200W out amp uses 10-12A; 15A for 1500-2200W, etc at 240VAC. Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lis; /archives//html/Amps/2011-01/msg00062.html (13,279 bytes)
20. [Amps] Fuses (score: 1): Author: "Carol Richards" <n2mm@comcast.net>; Date: Fri, 7 Jan 2011 16:52:23 -0500; Thank you to everyone for your thoughts and suggestions. from the responses I will need to: 1. Replace the fuse holder 2 Get fast blow 250v ceramic fuses- microwave oven fuses from home depot. 3. get; /archives//html/Amps/2011-01/msg00068.html (7,591 bytes)

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