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
There is no need to over-spec the UPS capacity too much, modern
computers actually use less electricity than the older ones, LCD flat
panels also consume far less than CRT monitors
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