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Sherlock Ohms

Fuse Holder Follies

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tekochip
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Platinum
Not the whole country
tekochip   8/29/2013 11:46:21 AM
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That's certainly an odd problem and a good example of why I tell people to troubleshoot everything rather than just replacing parts.

 

I'm not sure I would suggest anything designed in a particular country would be faulty, though. 

Well, maybe China.

Rob Spiegel
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Blogger
Re: Not the whole country
Rob Spiegel   8/29/2013 1:22:07 PM
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Yes, it is surprising. right up there with "The computer wonldn't work because it wasn't plugged in."

shehan
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Gold
Re: Not the whole country
shehan   8/29/2013 1:34:14 PM
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@Rob – It's always good to be careful when you remove internal components, always make sure you remove the plug from the power outlet. Also its vital to wear rubber foot wear to ensure you don't damage internal components for static electricity. 

a.saji
User Rank
Silver
Re: Not the whole country
a.saji   8/29/2013 11:49:27 PM
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@Shehan: Good point on safety precautions. Its vital that you follow the steps since you never know where things might pop up in electricity. Its not visible at any point. So being careful is the best way.     

radio-active
User Rank
Iron
Re: Not the whole country
radio-active   8/30/2013 8:30:29 AM
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Why would you say only the Germans could make a fuse holder that fails?

I'm not even German and I find that offensive.

Fuse holders (cartridge style) are among the most failure prone electro-mechanical components I've come across. The typically have poor quality contacts, inadequate spring pressure, and use metals dissimilar to the fuse itself. Any exposure to water or humidity and the corrosion begins. I've found them bad in motorcycles, boats, and trailers. Take them apart and you'll find bad wire crimps, green corrosion, fatigued springs, tin whisker growth, and degraded plastics.

I always end up replacing them with sealed type automotive holders, the ones with attached rubber boots. These will outlast the machine they are installed in. Just did this in my boat last weekend.

Pretty basic troubleshooting. Not really newsworthy.

AJ2X
User Rank
Silver
Re: Not the whole country
AJ2X   8/30/2013 8:59:12 AM
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Yeah, that "only a German" comment was way out of line.  It should never have made it to print.  Rotten components exist everywhere -- sometimes caused by poor design, inappropriate materials, sloppy manufacturing, lousy maintenance -- and are not the provenance of a single country.  It would have been better if the writer had expanded on the failure mechanism in the fuseholder rather than the country of origin.

Battar
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Platinum
Re: Not the whole country
Battar   9/1/2013 1:31:22 AM
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I think he means to say that only a German company can sell a component at quality price, with quality expectations, and then have it fail. When a cheap far-east component fails, it's still living up to expectations.

My mother told me never to buy a German car - her experience with Messerschmidt,  Heinkel, Focke-Wulf, Junkers, and BMW quality technology was too up close and personal in 1939-1945.

shehan
User Rank
Gold
Re: Not the whole country
shehan   8/30/2013 11:58:58 PM
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@a.saji – It's always important to take precautions before something happens. The slightest mistake could easily set up a fire damaging your entire property. 

Rob Spiegel
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Blogger
Re: Not the whole country
Rob Spiegel   9/3/2013 11:30:50 AM
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That's good advice, Shehan. I would imagine most people don't bother.

Technophile
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Bronze
Re: Not the whole country
Technophile   9/22/2013 1:33:40 PM
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Shehan, to avoid causing static damage to components it's best to wear a properly grounded (through about 1 Meg) wrist strap and/or a static-dissipative heel strap and use a static dissipative work mat, rather than wearing the rubber footwear you suggested.  Rubber footwear insulates and would allow a static charge to build up.  It's important to dissipate any static charge.

The reason for the 1 Meg or so series resistance:  suppose you had a low-impedance ground strap on one wrist, then got hold of voltage (including breaking a light bulb above your work bench or touching the socket when changing it) with the other hand.  Current path straight through your chest & heart. 

Cabe Atwell
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Blogger
Re: Not the whole country
Cabe Atwell   10/23/2013 6:17:07 PM
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Indeed shehan, that's sound advice especially in matters of safety.

wirkmanv
User Rank
Iron
Re: Not the whole country
wirkmanv   9/10/2013 6:14:24 PM
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An old friend of mine use to have his own TV shop.  When he would get a call from someone that the TV did not work and could he come fix it he would always ask them to check behind the TV to see if it was plugged in.  He said this solved may problems without his ever having to leave his shop.

Rob Spiegel
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Blogger
Re: Not the whole country
Rob Spiegel   9/12/2013 11:56:03 AM
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Isn't that amazing, Wirkmanv. It's hard to believe. Yet, there may come a day when I forget to check the power source before I panic when a product doesn't work.

shehan
User Rank
Gold
Re: Not the whole country
shehan   8/29/2013 1:30:06 PM
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@tekochip – It's always good to trouble shoot than just replacing a fuse. It might take a bit more time to check the connections but sure it's worth than replacing the whole product. 

wirkmanv
User Rank
Iron
Re: Not the whole country
wirkmanv   9/10/2013 6:07:42 PM
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Reminds me of a problem I encountered while attend a Navy C school on an airborne HF receiver/transmitter.  A portion of the system was not working properly because the instructor had created a problem for me to troubleshoot so to start with I took out the fuse and looked at it.  It was a clear glass variety with the metal end caps.  Fuse looked fine so I started looking as some other things.  Everything kept pointing back to the fuse.  So I took it out and checked it again with a meter.  Voila.  It was blown but in one of the two end caps so it looked fine.  Taught me a lesson that I will never forget.  Once I replaced the fuse I found another problem.  The one the instructor had put in the system.  Took both solutions to the instructor.  He kept the fuse and said he would use it on in future troubleshooting exercises.

OLD_CURMUDGEON
User Rank
Platinum
RIDICULOUS comment!
OLD_CURMUDGEON   8/30/2013 2:03:32 PM
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Rob! 

You should be ashamed of yourself for allowing this blog to make it to the airwaves.  Criticizing German technology in the low-class, demeaing, insulting manner with which this entry was made is totally classless, and doesn't belong in a technical magazime forum.  While freedom of speech IS a sacred right in the U.S., this commentary was not only offensive, but totally without merit & not GERMAiNe to the story.

p.s.  I am of GERMAN descent, and VERY proud of it, although my pride for the U.S. is far and away MORE important to me and has been for my entire life!

 

dindyk
User Rank
Iron
German engineering
dindyk   9/2/2013 6:27:11 PM
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With over 40 years experience in electronics (fault finding, development, design) i would suggest that remark about German engineering is so wide of the mark, it's actually laughable. As far as brands are concerned, my car is a 1972 VW Beetle (only the germans can make a car that still drives so nicely after 41 years), my motorbike is a 1978 Motor-Radwerk Zchopau 250TS-5 cafe racer, i'd like to see a production HD last as long... my electric drill is a Bosch.. etc etc. FWIW, American stuff is usually good also...

As far as not buying German brands, many of my family perished in the camps. so what?... the war is over... and it has nothing to do with the quality of German engineering.

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