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| Thread ID: 34001 | 2003-06-01 07:11:00 | Moving a Computer Overseas | kimchi (3918) | Press F1 |
| Post ID | Timestamp | Content | User | ||
| 149002 | 2003-06-01 11:18:00 | if ya using any video peripherals wif the ntsc or pal standard. N America is NTSC. like a capture card, tv tuner will not work. | nomad (3693) | ||
| 149003 | 2003-06-01 11:19:00 | > Well now, as we all know, the first thing the 240 > volts meets in a psu is a step-down transformer which > probably drops the AC voltage to around 20 volts > prior to rectification to DC . Not generally (or possibly ever) the case in PC PSU's . The mains is rectified and the resulting (~320v DC in a 230v system) is applied to a "switchmode" chopper transistor circuit, operating at high frequency, and using a ferrite cored "transformer" . Hence the reason that some PSU are "World Voltage" capable, as the only thing that changes is the "on" time of the chopper transistor at the lower voltage inputs, allowing more energy to flow in the primary of the transformer . Almost all computer PSU's I have seen are 220 - 110 switchable or are "World Voltage" 100 - 230v with no settings needed . Early XT supplies involved switching in an extra series filter capacitor on the "220v" setting, giving 1/2 the smoothing capacity and twice the voltage rating . Crude but effective . Regarding the plug arrangements, just buy an IEC computer power lead in Canada, that will have the correct plug on the end . Likely to be cheaper than an adaptor . |
godfather (25) | ||
| 149004 | 2003-06-01 11:32:00 | The opisite actually,but it corralates directly with running a psu off the wrong voltage setting . The incendent i refer to in this case was a machine where the owner had switched over the voltage regulater switch on the psu . When he booted up she went sky high . Yes i was a witness to the the event,thats why i used the word 'seen' . hers a bit of info ot that one if your still confused . seen- 1 . To perceive with the eye . oh,the world isnt limited to NZ btw . . . well,maybe your world is . |
metla (154) | ||
| 149005 | 2003-06-01 11:34:00 | think ill repeat that with improved spelling . The opposite actually, but it correlates directly with running a psu off the wrong voltage setting . The incident i refer to in this case was a machine where the owner had switched over the voltage regulator switch on the psu . When he booted up she went sky high . Yes i was a witness to the event, that’s why I used the word 'seen' . hers a bit of info on that one if your still confused . seen- 1 . To perceive with the eye . oh, the world isn’t limited to NZ btw . . . well, maybe your world is . |
metla (154) | ||
| 149006 | 2003-06-01 11:39:00 | > When he booted up she went sky high . Exactly what would happen too, where the PSU was set to 110v and had 230v applied . The filter capacitor would often explode, leaving its entrails throughout the PSU . On the reverse scenario (a 230v setting used at 110v) it would probably simply fail to start the PC, as the "power_good" signal from the PSU would not be generated, as the PSU rectified mains input energy would be too low to allow the switchmode supply to function correctly . |
godfather (25) | ||
| 149007 | 2003-06-01 11:53:00 | Hi Metla, thanks for the improved spelling . It helps . I am not at all confused, but seems you are . My world is not limited to NZ . I only said that as in NZ we have 230v supply, and so it is unlikely here, you would have used a 110v supply to blow up a 230v PSU as you mentioned . More than that, I have been in Canada, and used equipment and PC's on their 110v supply . Thankyou Godfather for pointing out what I was trying to convey about powering 230v PSU from 110v . Take note Metla . |
Bazza (407) | ||
| 149008 | 2003-06-01 12:15:00 | > Hi Metla, thanks for the improved spelling. It > helps. > > I am not at all confused, but seems you are. > > My world is not limited to NZ. I only said that as in > NZ we have 230v supply, and so it is unlikely here, > you would have used a 110v supply to blow up a 230v > PSU as you mentioned. > > More than that, I have been in Canada, and used > equipment and PC's on their 110v supply. > > Thankyou Godfather for pointing out what I was > trying to convey about powering 230v PSU from 110v. > Take note Metla. Take note?...i always do,well,i do when those such as Godfather speak, it all adds to the knowledge base. Cant say you really added anything worth taking note of but maybe next time you will get there. |
metla (154) | ||
| 149009 | 2003-06-01 12:20:00 | > > Hence the reason that some PSU are "World Voltage" > capable, as the only thing that changes is the "on" > time of the chopper transistor at the lower voltage > inputs, allowing more energy to flow in the primary > of the transformer. > All is as Godfather says, but some cheap supplies may possibly blow if running off 110V on their 230 volt setting as the mark-space of the switching signal may open out beyond the safe operating area of the chopper transistor, especially if has manual voltage changeover and they didn't bother to include low input sensing. I don't think it would manage to fire up the load, but you never know. It is one way to find out how good your PSU is.:D Auto-sensing types without a manual switch are plug and play, and would just need the plug change or adaptor. A different connecting lead may be needed for the modem though. Cheers Billy 8-{) |
Billy T (70) | ||
| 149010 | 2003-06-01 19:50:00 | One is reminded of Swan who said,heat wont pass from the cooler to the hotter,you can try but had far better notter. | Thomas (1820) | ||
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