Hej the device your looking for is an autotransfomer , it has the capabilty of stablilising the line supply, to within about 10v of nominal. The swich mode supply in a PC will cope happily with the supply going down to 200v and up to 250V, its the fast transients you need to try to catch, very fast spikes of less than 1mSec
Sorry guys here comes the swedish stuff if you cant get a ELFA catalogue look at the st�rskyddsutrusting section, perhaps a st�rskyddstransformatorer in line would help, trouble is these things are not cheap SEK 5000. if you hav'nt got a catalog call them on 020 75 8000. Line stabilation is always worth while when testing s/w, especially in areas where the weather can get a bit cold, I think it was -12 up there today ( snow here) Ican help at all you can e-mail direct. mvh Oden Eriksson wrote: > > On Fridayen den 9 November 2001 14.07, kons Richard Bown wrote: > > Hi all > > > > I d be very suprised if the problems were related to elctrolytics caps > > on the motherboard, > > there's no new technology with making them these days and they are > > pretty reliable, in that type of use... > > BUT > > > > > > the most unreliable place to put them is in switch mode power supplies, > > this is where they will dry out agive problems, crashes in the night can > > be caused by line transients, esecially in urban areas. often caused by > > the supply company switching sources, > > electrolyte caps wont do anything about line surges, unless they are for > > periods of greater than 100 mSec. > > > > I would be more inclined to put line transient protection on the supply > > to the pc, and maybe if your really worried, change the switchmode PSU > > in the pc, there only about $20. > > Definalty do not try to change ant thru hole component on a motherboard > > unless you know > > how to work with multilayer pcb's, and have some understanding of ESD > > > > > > HTH but probally caused more confusion. > > Not at all. > > The most ultimate solution I was about to implement a couple of years ago but > didn't for some reason was a car PSU, a car battery and a charger. Clean > power and a sort of UPS function too, very neat except it's quite costy. > > Where I live there's problem all the time with transients, the light's > flashing constantly, it's a miracle my PSU:s haven't gone up in smoke yet. > It's just a couple of kilometers to the nearest powerplant (Akkats, 1,9km > above the arctic circle;)). I wouldn't be surprised if the AC power differs > between 220 - 240 volts here... I don't even trust the grounded outlets > either.. > > A good middleware solution would be a device where you have the power from > the outlet galvanically(?) separated from the PSU, but that's quite costy > too... I don't know the english name of that sort of device, sorry. I use > these in studio and also on stage sometimes to isolate hum (ground loops) > because the ground is too dirty(!). (I'm a sound technician from time to > time...) > > I wouldn't dare solder my motherboard ;) > > I think the most problems are becasue of ESD shocks, and these suckers will > hopefully show immediately, but often after a couple of years. > > -- > -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- > | Oden Eriksson, Deserve-IT Networks, Jokkmokk, Sweden. > | Mandrake Linux release 8.2 (Cooker) for i586 > | Current uptime with kernel 2.4.13-4mdksmp: 29min > | cpu0 @ 814.28 bm, fan 4166 rpm, temp +33.0�C > | cpu1 @ 815.92 bm, fan 4115 rpm, temp +31�C -- Richard Bown Ericsson Microwave Systems AB SE-431 84 M�lndal e-mail [EMAIL PROTECTED] tel +46 31 74 72422 mobile +46 7098 72422
