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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