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#274378 - 14/01/2006 17:05 Power supply block
furtive
old hand

Registered: 14/08/2001
Posts: 886
Loc: London, UK
I think my power supply block is duff.

The empeg FAQ says that IBM Thinkpad power supplies are ok to use but before I use it, I want to confirm that it's not going to break anything. According to the label on the block, it outputs:

16v
4.5A

Is that going to do the trick?
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Mk2a RioCar 120Gb - now sold to the owner of my old car
Rio Karma - now on ebay...

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#274379 - 14/01/2006 17:26 Re: Power supply block [Re: furtive]
matthew_k
pooh-bah

Registered: 12/02/2002
Posts: 2298
Loc: Berkeley, California
I've used a thinkpad powersupply before, the only other spec you need to check is that it's center positive to be completely sure.

Matthew

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#274380 - 14/01/2006 17:31 Re: Power supply block [Re: matthew_k]
furtive
old hand

Registered: 14/08/2001
Posts: 886
Loc: London, UK
The little diagram seems to say it is.

EDIT: And it works fine


Edited by furtive (14/01/2006 17:32)
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#274381 - 15/01/2006 01:39 Re: Power supply block [Re: furtive]
tfabris
carpal tunnel

Registered: 20/12/1999
Posts: 31597
Loc: Seattle, WA
It's good that you double-checked. Plugging in the wrong power supply tends to let out the expensive blue smoke that powers the player.

The extra voltage and amperage might make the player run hotter (I think, if I understand how these things work, I'm not an expert in that sort of thing), so watch for that.
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Tony Fabris

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#274382 - 15/01/2006 01:58 Re: Power supply block [Re: tfabris]
mlord
carpal tunnel

Registered: 29/08/2000
Posts: 14493
Loc: Canada
The amperage rating of the PSU has nothing to do with anything here. It just indicates how big of a load one can connect before frying the power supply -- the empeg is small enough that 1amp or greater is fine.

-ml

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#274383 - 15/01/2006 07:05 Re: Power supply block [Re: mlord]
andy
carpal tunnel

Registered: 10/06/1999
Posts: 5916
Loc: Wivenhoe, Essex, UK
Just when we think Tony has final understood the relationship between voltage and current he proves us wrong again
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#274384 - 15/01/2006 07:16 Re: Power supply block [Re: andy]
tfabris
carpal tunnel

Registered: 20/12/1999
Posts: 31597
Loc: Seattle, WA
I shoulda just said Voltage, huh?
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Tony Fabris

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#274385 - 16/01/2006 21:03 Re: Power supply block [Re: mlord]
Shonky
pooh-bah

Registered: 12/01/2002
Posts: 2009
Loc: Brisbane, Australia
Quote:
The amperage rating of the PSU has nothing to do with anything here. It just indicates how big of a load one can connect before frying the power supply -- the empeg is small enough that 1amp or greater is fine.


You have to be a little careful saying that. On a regulated supply the statement is 100% correct. However on an unregulated supply the output voltage is generally going to be high at lower loads e.g. 1A load on a 4.5A supply. A 16V 4.5A unregulated supply will definitely output more than 16V when supplying 1A

To be sure you need to measure the supply at the desired load.

In this case, I'm sure a thinkpad supply is regulated so it's not a problem.
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Christian
#40104192 120Gb (no longer in my E36 M3, won't fit the E46 M3)

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