[aclug-L] Re: Power Transformers

[Bruce Bales <bbales@xxxxxxxxxxx>]

Four percent seemed pretty high to me, so I grabbed a handful of transformers
from the wart bag and tested them for power usage.  Using average current (don't
have an RMS meter) most of them run about four watts.  But I did find a big one
with four output voltages that pegged the meter at 200 mA.  That's 24 watts.

I've got seven with my computer stuff (some don't run all the time) and there
are probably 5 more in the rest of the house - using 12 x 4 watts gives 48
watt-hours per hour or 35kwh per month.  We averaged 1120kwh per month during
the last year I have it figured, so it's less than 3% if they are on all the
time.  And I suspect most folks have fewer than I.

Nevertheless - I have now found a better way to turn off my server.  Turn off
the power strip.
bruce


David Carmichael wrote:

> I was just reading the following:  _ Bush Takes Aim at "Wall Warts" _
> http://www.extremetech.com/article/0,3396,s%253D201%2526a%253D6333,00.asp
>
> And it talks about how power converts use up to 4% of a homes electrical
> power usage...
>
> Now I don't know about you guys but a drop of 4% in my electrical bill would
> be about $10 a month....
>
> But the question is... how does one create a power on demand transformer?
>
> In my home office alone I currently have close to 15 of these
> transformers... and they all seem to output different voltages, amps, some
> are AC -> DC, while others are AC -> AC.
>
> While a few of these could be placed on one of the under monitor style power
> strips that have on/off switches for each device... but many of them power
> device that may be called on 24 hours a day for the device to work (network
> hubs, DSL Modem, UHF Converts, ect.)
>
> So what's a person to do??
>
> David E. Carmichael
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