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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Tube fuse stuck in the tube
Hi, I have a ceramic tube fuse that is stuck. The fuse blew last week, and is set inside a tube that is just barely larger than the fuses diameter. The fuse is recessed about a 1/2" back. It's not magnetic, so a little magnet rod won't work. I've tried a little super glue on the end of a nail head, but that didn't work either, the glue connection failed. It's really stuck. This happened once before and we ended up tearing apart the fuse trying to dislodge it and in turn tore up the housing. Cost us $125 to replace that. I'd prefer not to go that route again if it's avoidable. Any ideas???
Thanks! Chip |
#2
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Tube fuse stuck in the tube
Chipperoni Inscribed thus:
Hi, I have a ceramic tube fuse that is stuck. The fuse blew last week, and is set inside a tube that is just barely larger than the fuses diameter. The fuse is recessed about a 1/2" back. It's not magnetic, so a little magnet rod won't work. I've tried a little super glue on the end of a nail head, but that didn't work either, the glue connection failed. It's really stuck. This happened once before and we ended up tearing apart the fuse trying to dislodge it and in turn tore up the housing. Cost us $125 to replace that. I'd prefer not to go that route again if it's avoidable. Any ideas??? Thanks! Chip Drill a small 1mm hole in the end and use a barbed fish hook straightened out, grip with pliers to pull it out. -- Best Regards: Baron. |
#3
Posted to sci.electronics.repair
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Tube fuse stuck in the tube
Jamie t wrote:
Chipperoni wrote: Hi, I have a ceramic tube fuse that is stuck. The fuse blew last week, and is set inside a tube that is just barely larger than the fuses diameter. The fuse is recessed about a 1/2" back. It's not magnetic, so a little magnet rod won't work. I've tried a little super glue on the end of a nail head, but that didn't work either, the glue connection failed. It's really stuck. This happened once before and we ended up tearing apart the fuse trying to dislodge it and in turn tore up the housing. Cost us $125 to replace that. I'd prefer not to go that route again if it's avoidable. Any ideas??? Thanks! Chip get a 6/32 start tap (tapered) and proper drill bit, something tells me it maybe a #29 but don't quote me on that one. Drill a hole in the end cap of the fuse, and then try to tap it. Use the tap or a 6/32 screw to gently pull it out. Jamie If you have a good ironwith a chisel tip you may be able to solder a lead to the end cap and yank it out. You might also melt something. |
#4
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Tube fuse stuck in the tube
Chipperoni wrote:
Hi, I have a ceramic tube fuse that is stuck. The fuse blew last week, and is set inside a tube that is just barely larger than the fuses diameter. The fuse is recessed about a 1/2" back. It's not magnetic, so a little magnet rod won't work. I've tried a little super glue on the end of a nail head, but that didn't work either, the glue connection failed. It's really stuck. This happened once before and we ended up tearing apart the fuse trying to dislodge it and in turn tore up the housing. Cost us $125 to replace that. I'd prefer not to go that route again if it's avoidable. Any ideas??? Thanks! Chip get a 6/32 start tap (tapered) and proper drill bit, something tells me it maybe a #29 but don't quote me on that one. Drill a hole in the end cap of the fuse, and then try to tap it. Use the tap or a 6/32 screw to gently pull it out. Jamie |
#5
Posted to sci.electronics.repair
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Tube fuse stuck in the tube
Chipperoni wrote in message
... Hi, I have a ceramic tube fuse that is stuck. The fuse blew last week, and is set inside a tube that is just barely larger than the fuses diameter. The fuse is recessed about a 1/2" back. It's not magnetic, so a little magnet rod won't work. I've tried a little super glue on the end of a nail head, but that didn't work either, the glue connection failed. It's really stuck. This happened once before and we ended up tearing apart the fuse trying to dislodge it and in turn tore up the housing. Cost us $125 to replace that. I'd prefer not to go that route again if it's avoidable. Any ideas??? Thanks! Chip -- Chipperoni I would find a metal cylinder sleeve to protect the housing and a small sharp drill bit, Don't drill for long or the heat will break the bond to the cap. Stop the drill , in situ, and hopefully pull out the fuse. Failing that , assuming you have a hole, then a thin tapered screw jammed in the hole and pulled. If the cap, only, dislodges then use the fuse barrel as a sleeve and continue drilling to the end , for a second attempt at snagging the drill bit. |
#6
Posted to sci.electronics.repair
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Tube fuse stuck in the tube
"Chipperoni" Hi, I have a ceramic tube fuse that is stuck. The fuse blew last week, and is set inside a tube that is just barely larger than the fuses diameter. The fuse is recessed about a 1/2" back. It's not magnetic, so a little magnet rod won't work. I've tried a little super glue on the end of a nail head, but that didn't work either, the glue connection failed. It's really stuck. This happened once before and we ended up tearing apart the fuse trying to dislodge it and in turn tore up the housing. ** There was a certain brand of 3AG size cartridge fuse holder that was widely on sale in Australia - it was labelled as having local ( WA) Energy Authority approval too - a rarity indeed. This was mainly based on the fact it was " finger safe" even when the circuit was live. It seemed rather well mad,e so I bought a number of them for use in various situations, as did many others. Soon I found they had a major flaw - if the 3AG fuse ever got hot, the plastic body shrank and trapped it inside for ever. A 5 amp rated fuse running at 5 amps or so was enough to do it over time. A 10 amp fuse running at 10 amps would do it in a matter of minutes. So ****ing much for authority approval - eh ? ..... Phil |
#7
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Tube fuse stuck in the tube
Phil Allison wrote:
"Chipperoni" Hi, I have a ceramic tube fuse that is stuck. The fuse blew last week, and is set inside a tube that is just barely larger than the fuses diameter. The fuse is recessed about a 1/2" back. It's not magnetic, so a little magnet rod won't work. I've tried a little super glue on the end of a nail head, but that didn't work either, the glue connection failed. It's really stuck. This happened once before and we ended up tearing apart the fuse trying to dislodge it and in turn tore up the housing. ** There was a certain brand of 3AG size cartridge fuse holder that was widely on sale in Australia - it was labelled as having local ( WA) Energy Authority approval too - a rarity indeed. This was mainly based on the fact it was " finger safe" even when the circuit was live. It seemed rather well mad,e so I bought a number of them for use in various situations, as did many others. Soon I found they had a major flaw - if the 3AG fuse ever got hot, the plastic body shrank and trapped it inside for ever. A 5 amp rated fuse running at 5 amps or so was enough to do it over time. A 10 amp fuse running at 10 amps would do it in a matter of minutes. So ****ing much for authority approval - eh ? It's like the UL stickers on stuff in US. It only means somebody payed for the holographic sticker, and if you can't get those fake, in China I'd be shocked, even more than from the device itself. I'd be terrified to even run 24 volts though the christmas tree lighting stuff they sell here. |
#8
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Tube fuse stuck in the tube
"Cydrome Leader" ** There was a certain brand of 3AG size cartridge fuse holder that was widely on sale in Australia - it was labelled as having local ( WA) Energy Authority approval too - a rarity indeed. This was mainly based on the fact it was " finger safe" even when the circuit was live. It seemed rather well made, so I bought a number of them for use in various situations, as did many others. Soon I found they had a major flaw - if the 3AG fuse ever got hot, the plastic body shrank and trapped it inside for ever. A 5 amp rated fuse running at 5 amps or so was enough to do it over time. A 10 amp fuse running at 10 amps would do it in a matter of minutes. So ****ing much for authority approval - eh ? It's like the UL stickers on stuff in US. It only means somebody payed for the holographic sticker, and if you can't get those fake, in China I'd be shocked, even more than from the device itself. ** The labelling was not fake, the supplier was one of Australia's largest and the holders were not from China. My information was that the testing required for agency approval did not include operating with a fuse that dissipated several watts of heat. The failure mode was not unsafe - just damn stupid. ..... Phil. |
#9
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#10
Posted to sci.electronics.repair
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Tube fuse stuck in the tube
qOn Fri, 12 Apr 2013 09:17:23 +1000, "Phil Allison"
wrote: My information was that the testing required for agency approval did not include operating with a fuse that dissipated several watts of heat. The failure mode was not unsafe - just damn stupid. .... Phil. That is true that the approvals testing is absolutely only for the electrical safety of the device. No consideration is made of the suitability or whether it does what it claims. But so long as it does not burn the environment, or allow little fingers to probe into live parts, then that is all that is being tested. peter |
#11
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Tube fuse stuck in the tube
"Baron" wrote in message ... Chipperoni Inscribed thus: Hi, I have a ceramic tube fuse that is stuck. The fuse blew last week, and is set inside a tube that is just barely larger than the fuses diameter. The fuse is recessed about a 1/2" back. It's not magnetic, so a little magnet rod won't work. I've tried a little super glue on the end of a nail head, but that didn't work either, the glue connection failed. It's really stuck. This happened once before and we ended up tearing apart the fuse trying to dislodge it and in turn tore up the housing. Cost us $125 to replace that. I'd prefer not to go that route again if it's avoidable. Any ideas??? Thanks! Chip Drill a small 1mm hole in the end and use a barbed fish hook straightened out, grip with pliers to pull it out. And if none of the suggestions so far get the fuse out - replacing the fuse holder outright would be a *VERY* good idea! |
#12
Posted to sci.electronics.repair
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Tube fuse stuck in the tube
"Chipperoni" wrote in message ... Chipperoni;3043234 Wrote: Hi, I have a ceramic tube fuse that is stuck. The fuse blew last week, and is set inside a tube that is just barely larger than the fuses diameter. The fuse is recessed about a 1/2" back. It's not magnetic, so a little magnet rod won't work. I've tried a little super glue on the end of a nail head, but that didn't work either, the glue connection failed. It's really stuck. This happened once before and we ended up tearing apart the fuse trying to dislodge it and in turn tore up the housing. Cost us $125 to replace that. I'd prefer not to go that route again if it's avoidable. Any ideas??? Thanks! Chip Well, after a couple days (and a trial run on another fuse) I attempted the drill/screw/pull technique. I'm happy to say it was successful. Here's what happened. There is a plastic ring that heat shrunk around the middle of the fuse. The ring's purpose was to give the end cap something to lock on to. So I got the fuse out, but the ring came with it. So now I have to figure out how to get the cap to stay depressed in the unit so the fuse stays connected. A much easier problem to contend with. Thanks for all the help! Sounds like that fuse holder will just be a PITA again at some later date - best bet is replace it with one that isn't a bit dodgy. |
#13
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Tube fuse stuck in the tube
On Mon, 08 Apr 2013 20:15:01 -0400, Jamie
t wrote: Chipperoni wrote: Hi, I have a ceramic tube fuse that is stuck. The fuse blew last week, and is set inside a tube that is just barely larger than the fuses diameter. The fuse is recessed about a 1/2" back. It's not magnetic, so a little magnet rod won't work. I've tried a little super glue on the end of a nail head, but that didn't work either, the glue connection failed. It's really stuck. This happened once before and we ended up tearing apart the fuse trying to dislodge it and in turn tore up the housing. Cost us $125 to replace that. I'd prefer not to go that route again if it's avoidable. Any ideas??? Thanks! Chip get a 6/32 start tap (tapered) and proper drill bit, something tells me it maybe a #29 but don't quote me on that one. Drill a hole in the end cap of the fuse, and then try to tap it. Use the tap or a 6/32 screw to gently pull it out. I like this but don't think you need the tap. It's hard to tap sheet metal anyhow. Drill the hole, use a sheet metal screw that at the hole's diameter is still getting bigger, screw it in until it's hard to screw, pull it all out with needle nose. Jamie |
#14
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Tube fuse stuck in the tube
micky wrote:
On Mon, 08 Apr 2013 20:15:01 -0400, Jamie t wrote: Chipperoni wrote: Hi, I have a ceramic tube fuse that is stuck. The fuse blew last week, and is set inside a tube that is just barely larger than the fuses diameter. The fuse is recessed about a 1/2" back. It's not magnetic, so a little magnet rod won't work. I've tried a little super glue on the end of a nail head, but that didn't work either, the glue connection failed. It's really stuck. This happened once before and we ended up tearing apart the fuse trying to dislodge it and in turn tore up the housing. Cost us $125 to replace that. I'd prefer not to go that route again if it's avoidable. Any ideas??? Thanks! Chip get a 6/32 start tap (tapered) and proper drill bit, something tells me it maybe a #29 but don't quote me on that one. Drill a hole in the end cap of the fuse, and then try to tap it. Use the tap or a 6/32 screw to gently pull it out. I like this but don't think you need the tap. It's hard to tap sheet metal anyhow. Drill the hole, use a sheet metal screw that at the hole's diameter is still getting bigger, screw it in until it's hard to screw, pull it all out with needle nose. Well I always have a portable tap drill set with a battery operated drill in my tool set, it isn't much (small) but it gets me by. I also use it for screw and nut driver functions. Using the tap to extract an end cap of a fuse would be handy for me since I would already have it.. Also, depending on how deep the fuse end would be, would determine if a skinny sheet metal screw long enough to reach would be available. Jamie |
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