Re: Green Apple Small Carbon

["Charlie" <charlieDOTd@verEYEzon.net>]

"John" <zzzjoki@yahoo.com> wrote in message 
1180211205.955489.272860@a26g2000pre.googlegroups.com">news:1180211205.955489.272860@a26g2000pre.googlegroups.com...
> On May 26, 1:23 pm, "Charlie" <charlieD...@verEYEzon.net> wrote:
>> "Michael J. Mahon" <mjma...@aol.com> wrote in 
>> messagegJmdnc-iUNiSFMXbnZ2dnUVZ_qWvnZ2d@comcast.com">news:gJmdnc-iUNiSFMXbnZ2dnUVZ_qWvnZ2d@comcast.com...
>>
>>
>>
>> > Charlie wrote:
>> >> "Michael J. Mahon" <mjma...@aol.com> wrote in message
>> >>EO2dnbf-V-o4B8rbnZ2dnUVZ_h2pnZ2d@comcast.com">news:EO2dnbf-V-o4B8rbnZ2dnUVZ_h2pnZ2d@comcast.com...
>>
>> >>>mspangler wrote:
>>
>> >>>>To figure out how long my data collection Apple II would run on its
>> >>>>UPS, I put a Kill-a-watt meter on it. It pulls 24 VA (not counting 
>> >>>>the
>> >>>>monitor). My Mac mini (dual core 1.66 GHz) pulls 28 VA if the optical
>> >>>>drive is not running. So you're not necessarily as much greener as 
>> >>>>you
>> >>>>may think.
>>
>> >>>I just got one of those yesterday!
>>
>> >>>Did you look at the power consumption (not allowing for power factor)?
>> >>>(After all, the Apple II power supply was *way* before power factor
>> >>>correction.  ;-)
>>
>> >> Do any computer power supplies sold in the United States have power
>> >> factor correction?  I believe they are standard in Europe but I'm not
>> >> sure about the US.
>>
>> > Europe was quicker to lower the power levels requiring PFC than the US,
>> > but progress up the learning curve for PFC supplies, higher integration
>> > levels, and the economies of making "global" power supplies are pushing
>> > PFC into more power supplies every day.
>>
>> > Higher powered supplies will be the first to go to PFC, of course.
>>
>> Thanks Michael.  After posting I did a quick look on the net (should have
>> done that first) and found several PFC supplies marketed in the US.
>>
>> >> Also, in another newsgroup a poster argued that the Kill-a-watt meter
>> >> isn't accurate when used with a computer due to the switching power
>> >> supply.  He claimed that the Kill-a-watt meter needed a true sine wave
>> >> for accuracy and that the switching power supply warped the normal AC
>> >> sine wave.  I have no idea as to the validity of that argument but
>> >> figured you would be the guy to ask.
>>
>> > I don't know the circuit of the Kill-a-Watt, but, since it makes a
>> > distinction between watts and VA, and clearly is controlled by a
>> > microprocessor, it is not unreasonable that it computes using the
>> > actual sampled waveforms for current (if not voltage, which is almost
>> > always sinusoidal unless it's locally produced by an inverter).
>>
>> > It would be possible to so some experiments to find out, but probably
>> > easier to try to find documentation on the design.
>>
>> Yes if I recall correctly there was a discussion along those lines in the
>> other group but no resolution. :-(
>> I really want the Kill-a-Watt to work as it seems like it does a lot for 
>> a
>> very reasonable price.
>>
>> Charlie
>
> OK. I just went off to Amazon and ordered a P3 4400. I hope that's
> what you meant. It looks pretty darn cool. I'll be checking a few
> things. Neat.

That's it.

> Anyway, if I understand what was posted, could the power supply itself
> in the A2 be the most wasteful component aside from the monitor?

I have no idea on that.  Sounds like another question for Michael.  ;-)

Charlie