Hi all... I've got a hub and the transformer burned up. So as a replacement I got the type that has multi-value for the volts, ie from 0 to 12v. My hub uses 5v, but the transformer has only 4.5 and 6v. I put the dial about between the two. It works, but is this good? It also works when I set it at 6v, but could this be too much? Any ideas? Thanks JIM -- Jim Hatridge Linux User #88484 ------------------------------------------------------ BayerWulf Linux System # 129656 The Recycled Beowulf Project Looking for throw-away or obsolete computers and parts to recycle into a Linux super computer WartHog Bulletin Info about new German Stamps http://www.fuzzybunnymilitia.org/~hatridge/bulletin Viel Feind -- Viel Ehr' Anti-US Propaganda stamp collection http://www.fuzzybunnymilitia.org/~hatridge/collection
Jim, I did the same thing myself here at home a couple of weeks ago. I had lost the adapter for my iPaq cradle and tossed on one of the same type of adapters. It seemed to charge fine so I left it plugged in and went off to bed. Realizing, 15 minutes later, that I hadn't plugged in my cell phone I went back downstairs to find that the adapter was actually melting and was impossible to touch due to the heat. Bottom line here is to NEVER use another adapter that is not specifically rated for, both in VOLTAGE and AMPERAGE, the device I need to power. Had I not forgotten the phone I have no doubt that I would have lost my house and probably my life!! Saving the $$ isn't worth it. BTW, the voltage selector switch on most of the adapters you are describing do not have a variable, slide type, control but a series of contacts. I suspect that you are actually connected to one, the other or possibly both contacts and therefore not really getting what you think you might be. Toss a meter onto the adapter and make sure the amperage is correct also. Hope this helps, Dave Watkins (Not an electrician, but able to cook a desk fine) -----Original Message----- From: James Hatridge [mailto:James.Hatridge@epost.de] Sent: Thursday, February 26, 2004 10:07 AM To: SuSE Subject: [SLE] Hardware question... Hi all... I've got a hub and the transformer burned up. So as a replacement I got the type that has multi-value for the volts, ie from 0 to 12v. My hub uses 5v, but the transformer has only 4.5 and 6v. I put the dial about between the two. It works, but is this good? It also works when I set it at 6v, but could this be too much? Any ideas? Thanks JIM -- Jim Hatridge Linux User #88484 ------------------------------------------------------ BayerWulf Linux System # 129656 The Recycled Beowulf Project Looking for throw-away or obsolete computers and parts to recycle into a Linux super computer WartHog Bulletin Info about new German Stamps http://www.fuzzybunnymilitia.org/~hatridge/bulletin Viel Feind -- Viel Ehr' Anti-US Propaganda stamp collection http://www.fuzzybunnymilitia.org/~hatridge/collection -- Check the headers for your unsubscription address For additional commands send e-mail to suse-linux-e-help@suse.com Also check the archives at http://lists.suse.com Please read the FAQs: suse-linux-e-faq@suse.com
Jim,
I did the same thing myself here at home a couple of weeks ago.
I had lost the adapter for my iPaq cradle and tossed on one of the same type of adapters. It seemed to charge fine so I left it plugged in and went off to bed. Realizing, 15 minutes later, that I hadn't plugged in my cell phone I went back downstairs to find that the adapter was actually melting and was impossible to touch due to the heat.
Bottom line here is to NEVER use another adapter that is not specifically rated for, both in VOLTAGE and AMPERAGE, the device I need to power. Had I not forgotten the phone I have no doubt that I would have lost my house and probably my life!! Saving the $$ isn't worth it.
BTW, the voltage selector switch on most of the adapters you are describing do not have a variable, slide type, control but a series of contacts. I suspect that you are actually connected to one, the other or possibly both contacts and therefore not really getting what you think you might be.
Toss a meter onto the adapter and make sure the amperage is correct also.
Hope this helps,
Dave Watkins (Not an electrician, but able to cook a desk fine)
-----Original Message----- From: James Hatridge [mailto:James.Hatridge@epost.de%5Dmailto:James.Hatridge@epost.de] Sent: Thursday, February 26, 2004 10:07 AM To: SuSE Subject: [SLE] Hardware question...
Hi all...
I've got a hub and the transformer burned up. So as a replacement I got the type that has multi-value for the volts, ie from 0 to 12v. My hub uses 5v, but the transformer has only 4.5 and 6v. I put the dial about between the two. It works, but is this good? It also works when I set it at 6v, but could this be too much? Any ideas?
Thanks
JIM -- Jim Hatridge Linux User #88484 ------------------------------------------------------ BayerWulf Linux System # 129656 The Recycled Beowulf Project Looking for throw-away or obsolete computers and parts to recycle into a Linux super computer
WartHog Bulletin Info about new German Stamps http://www.fuzzybunnymilitia.org/~hatridge/bulletinhttp://www.fuzzybunnymi
I have a similar story to tell. Some years ago, I acquired a notebook PC at a flea market. It had no batteries. I bought NiCads and wired them up, and then connected the charger. The following morning I found the case melted and the table-top charred. It would seem that the original battery pack had some kind of temperature switch in it. I also could have lost my house and my life. I reported that on one of these fora back then, but it is always good to repeat that information for the newcomers. --doug At 11:00 02/26/2004 -0700, Abacus Infomail wrote: litia.org/~hatridge/bulletin
Viel Feind -- Viel Ehr' Anti-US Propaganda stamp collection
http://www.fuzzybunnymilitia.org/~hatridge/collectionhttp://www.fuzzybunny militia.org/~hatridge/collection
-- Check the headers for your unsubscription address For additional commands send e-mail to suse-linux-e-help@suse.com Also check the archives at http://lists.suse.com/http://lists.suse.com Please read the FAQs: suse-linux-e-faq@suse.com
-- Check the headers for your unsubscription address For additional commands send e-mail to suse-linux-e-help@suse.com Also check the archives at http://lists.suse.com/http://lists.suse.com Please read the FAQs: suse-linux-e-faq@suse.com
James Hatridge wrote:
Hi all...
I've got a hub and the transformer burned up. So as a replacement I got the type that has multi-value for the volts, ie from 0 to 12v. My hub uses 5v, but the transformer has only 4.5 and 6v. I put the dial about between the two. It works, but is this good? It also works when I set it at 6v, but could this be too much? Any ideas?
Thanks
JIM
Try it on 4.5. If it works, leave it there. Are you sure that the knob does vary the voltage continuously between the 4.5 and 6.0 setting? If it does, the middle is OK. 6V is probably OK too, just feel the hub and see if it gets too warm. How did the old transformer burn up? Too much load on it?
Hi all... On Thursday 26 February 2004 19:05, expatriate wrote:
James Hatridge wrote:
Hi all...
I've got a hub and the transformer burned up. So as a replacement I got the type that has multi-value for the volts, ie from 0 to 12v. My hub uses 5v, but the transformer has only 4.5 and 6v. I put the dial about between the two. It works, but is this good? It also works when I set it at 6v, but could this be too much? Any ideas?
Thanks
JIM
Try it on 4.5. If it works, leave it there. Are you sure that the knob does vary the voltage continuously between the 4.5 and 6.0 setting? If it does, the middle is OK. 6V is probably OK too, just feel the hub and see if it gets too warm.
How did the old transformer burn up? Too much load on it?
I guess so... I use it for my 8 node 'wulf. When I have all 8 nodes going at speed the hub is more than hand warm. BTW it's a D-Link DSH-8 hub. A few days ago I had only a couple of the nodes up and running, just moving some files around no big thing. I went outside to get the mail etc. Came back inside and could smell that burning plasic smell. I'm sure everyone here knows it. I looked around and the transformer brick looked like it was designed by Dali. <G> Anyway I'm stuck with this hub until I can score a switch. BTW does anyone have an old usable 8 to 16 node switch laying around? I could go up to 10$ plus postage for a usable one. Thanks, JIM -- Jim Hatridge Linux User #88484 ------------------------------------------------------ BayerWulf Linux System # 129656 The Recycled Beowulf Project Looking for throw-away or obsolete computers and parts to recycle into a Linux super computer WartHog Bulletin Info about new German Stamps http://www.fuzzybunnymilitia.org/~hatridge/bulletin Viel Feind -- Viel Ehr' Anti-US Propaganda stamp collection http://www.fuzzybunnymilitia.org/~hatridge/collection
James Hatridge wrote:
Hi all...
On Thursday 26 February 2004 19:05, expatriate wrote:
James Hatridge wrote:
Hi all...
I've got a hub and the transformer burned up. So as a replacement I got the type that has multi-value for the volts, ie from 0 to 12v. My hub uses 5v, but the transformer has only 4.5 and 6v. I put the dial about between the two. It works, but is this good? It also works when I set it at 6v, but could this be too much? Any ideas?
Thanks
JIM
Try it on 4.5. If it works, leave it there. Are you sure that the knob does vary the voltage continuously between the 4.5 and 6.0 setting? If it does, the middle is OK. 6V is probably OK too, just feel the hub and see if it gets too warm.
How did the old transformer burn up? Too much load on it?
I guess so... I use it for my 8 node 'wulf. When I have all 8 nodes going at speed the hub is more than hand warm. BTW it's a D-Link DSH-8 hub. A few days ago I had only a couple of the nodes up and running, just moving some files around no big thing. I went outside to get the mail etc. Came back inside and could smell that burning plasic smell. I'm sure everyone here knows it. I looked around and the transformer brick looked like it was designed by Dali. <G>
Anyway I'm stuck with this hub until I can score a switch. BTW does anyone have an old usable 8 to 16 node switch laying around? I could go up to 10$ plus postage for a usable one.
Thanks,
JIM
Back in my other job we used to buy these "cheap" bricks that were supposed to work at 110-240V, 50-60Hz. Unfortunately, they were blowing up at European customer sites. The transformer's impedance was just too low at 50Hz. It seems your hub is taking in a lot of current too. As other posters have mentioned make sure that the current rating of the brick exceeds the current rating of the hub. I've never had a hub get hotter than my hand can hold. Putting on my paranoid schizophrenic hat I would measure the current drawn by the hub as you plug in each node. Maybe the problem is a ground loop produced by one of the computers you're plugging in. My 10-node Linksys hub never gets too warm to the touch.
I've got a hub and the transformer burned up. So as a replacement I got the type that has multi-value for the volts, ie from 0 to 12v. My hub uses 5v, but the transformer has only 4.5 and 6v. I put the dial about between the two. It works, but is this good? It also works when I set it at 6v, but could this be too much? Any ideas? Hi Jim, Right, first off, why did the xformer burn up? If it was a fault in
On Thursday 26 February 2004 17:06, James Hatridge wrote: the hub, then you have to watch out! It could cook another transformer and ... fire! On to this new one - is it a truly variable type, or is it a "select a voltage from the list. and slide a clicky slider to select". If it is the former, then just so long as (a) your hub is okay, and (b) the current rating is adequate on the transformer, then you should be fine. If it is the "clicky slidey" type then you could in fact be arcing the connection between the two and that is baaaaad - try the 4.5 volts and so long as you notice no problems, leave it at that. Make *SURE* your new transformer can handle the load- I have had one that I misread and a big melty mess was the result! It gave 1A output - the box I connected it to tried to take 10A..... Pretty amazing to watch, but not recommended for your health, or house insurance :g:.
Hi With 99% certainty, 6V is totally OK. In most cases those hubs has internal regulator, so feeding it with somewhere between 4-7 volts is accectable. Those small wall-transformers gives not-so-clean DC, so further regulation is done inside the hub. You can keep it on for some time, and check with Your hand that either one gets too hot. If the transformer gets too hot, replace with one that has more watts. Jaska. James Hatridge kirjoitti viestissään (lähetysaika Torstai 26. Helmikuuta 2004 19:06):
Hi all...
I've got a hub and the transformer burned up. So as a replacement I got the type that has multi-value for the volts, ie from 0 to 12v. My hub uses 5v, but the transformer has only 4.5 and 6v. I put the dial about between the two. It works, but is this good? It also works when I set it at 6v, but could this be too much? Any ideas?
Thanks
JIM -- Jim Hatridge Linux User #88484 ------------------------------------------------------ BayerWulf Linux System # 129656 The Recycled Beowulf Project Looking for throw-away or obsolete computers and parts to recycle into a Linux super computer
WartHog Bulletin Info about new German Stamps http://www.fuzzybunnymilitia.org/~hatridge/bulletin
Viel Feind -- Viel Ehr' Anti-US Propaganda stamp collection http://www.fuzzybunnymilitia.org/~hatridge/collection
participants (6)
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Abacus Infomail -
Doug McGarrett -
expatriate -
James Hatridge -
jaska -
The Purple Tiger