[RFI] Belkin PureAV™ Home Theater Battery Back up

Roger (K8RI) k8ri at rogerhalstead.com
Sat Dec 5 07:21:18 PST 2009

Brendan Minish wrote:
> On Sat, 2009-12-05 at 04:17 -0500, Roger (K8RI) wrote:
>> I'm running 6 APCs that vary from 500 watts to 1500. I can't imagine 
>> running a modern computer on anything less than the big ones.  So far 
>> "on the ones I have", when running off the battery I've found no 
>> discernible noise in the HF range.
> Well I am quite active on 160M 80M and 500Khz and I have found quite a
> bit for trash there, also between 2-3.3Mhz . 
> I had a 5KVA Smartups here for a while it was horrible on 40m until
> fitted with a pretty serious line filter. In all cases my connected
> systems included quite a bit of network cabling thus providing the noise
> source with an effective antenna 
I have 3, 130' runs of CAT6, plus 3 shorter runs of roughly 25-30' in 
the house.
> There is no need to over-spec the UPS capacity too much, modern
> computers actually use less electricity than the older ones,
Depends on the computers. Just my video cards take close to 300 watts each.
>  LCD flat
> panels also consume far less than CRT monitors 
Agreed on the LCDs, however all but one of the computers here are 
running 125 watt, quad core CPUs in full size tower cases. Add to that 
the 300 watt plus video cards and att idle the computers even with LCD 
monitors take quite a bit of power. When working hard they can pull over 
400 watts.  So my latest, state-of-the-art, mounted in full size tower 
cases definitely do not draw less than the older computers we had.  Most 
I know running computers are running large ones with lots of muscle.  
OTOH Unlike most who post on these forums, the average user is 
completely clueless about computers, or ham radio.  As a GA I taught 
"the intro to computer science" to Liberal Arts majors at a nearby 
university. Out of 195 students only 10 could type, probably that many 
were not going to survive the class, and there were about 10 who knew 
more than I did...why they were in there I don't know, but teaching that 
class gave me a good overview of computer literacy in the area at the time.


Roger (K8RI)

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