Posted by
w8fn on
Sep 01, 2017; 12:09am
URL: http://elecraft.85.s1.nabble.com/Wattage-Draw-K3S-100-vs-KPA500-KAT500-for-UPS-tp7633842p7633934.html
Hmmm. I had a Cyber Power 1500VA unit for a while on my station, but one
day I transmitted on 12 meters and something inside the thing made a
"pop". This was followed by a loud "crack" and the UPS expired then and
there. I should note I have an extremely difficult RF environment on my
tiny urban lot (a second floor shack with a SteppIR 3L about 15 feet
directly over the operating chair). This might have been a one-off
thing, but if you're going to use one of the Cyber Power devices, check
it at LOW RF levels on all bands for EMI problems.
73...
Randy, W8FN
On 8/31/2017 4:53 PM, Jim Brown wrote:
> Perhaps by accident, I found Cyber Power branded UPS units that 1)
> claim an 8 hour charging rate and 2) FCC Part 15 Class B compliance
> for their pseudo-sinewave units. I have two of them in my shack with a
> 160M vertical only 25 ft away, and with good chokes on their wiring,
> can't hear any noise when they're in standby mode. Haven't checked for
> noise when they're inverting.
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