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Posted by BillW50 on September 28, 2006, 10:01 pm
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Plan9 wrote:
> Where I live it was 9/13/2006 2:18 AM, when hizark21@yahoo.com wrote:
>> A friend has told me that his AC adapter had been producing excessive
>> amounts of heat. Not really sure if this a problem since I have had
>> other wall mount AC adapters that put out a lot of heat.
>
> I recently did the following experiment with my HP-DV8000z and its 65
> watt ac adapter.
>
> I ran the notebook battery down by using it and then I plugged the AC
> adapter/charger into a wall outlet with no surge protection and used
> the notebook for about an hour before taking measurements. Here are
> the results as accurately as I could determine with "crude" methods.
> To get the temperature of the AC adapter I held the bulb of a mercury
> thermometer to the side of the adapter with a cotton ball between my
> finger and the thermometer and the bulb resting against the case for
> about 5 minutes until the temperature seemed to stabilize. That's the
> only way I could think of measuring the temperature without drilling a
> hole in the adapter case :-)
>
> Ambient temp 30C (86F)
> AC adapter temp 51C (124F)
>
> I would guess that those readings are within specs. It just feels a
> whole lot hotter. After all "hot" is subjective. So based on this
> experiment my guess is it is safe to use. It just might have a
> shorter lifetime than if it were running a little cooler.
If you get into measuring temperatures like I do, you may want to
purchase something like this:
http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXEMG5&P=ML
--
Bill
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