Hello RFI Group, I'm wondering if there is a commercially made UPS (Uninterruptable Power Supply) that is RF quiet, or more RF quiet, than the average? I've used a variety of UPS units and all of t
Hi Dick Im using an APC NS 1350 in my shack directly under the desk top. Computer, rig power supply and two monitors plugged into the unit. Zero noise. Rig is a K3S and I have a very low noise floor
Yes, the CyberPower CP1500PFCLCD. I have five of them, first bought at least ten years ago. In addition to being relatively quiet when in standby mode, it has the MAJOR virtue of not overcharging the
I thought about one of these to keep my frequency standards powered during power outages until I read the 5% 1-star reviews on Amazon: https://www.amazon.com/product-reviews/B00429N19W/ref=acr_dp_hi
Another vote for the Cyberpower consumer equipment noted by Jim as being free of RFI. They also make larger units that are FCC Part 15 Class B certified. Many larger UPSs are Class A (industrial) and
That may stem from badly misguided semi-pro audio folks who used what they called "balanced power" that became a mini-fad 20 years ago. Bill Whitlock exposed the falce logic behind it. 73, Jim K9YC _
I'll add to the Cyberpower crowd. I can't detect any noise from the one in my ham shack. Antennas are very close to the house. Noise lever is moderate suburban. RX FT5K and an MP 73, Dan ____________
I, too, have found my Cyberpower UPS to be RF quiet, even when it's running the radio on the battery. It also generates a clean sine wave at a reasonable cost. 73, Scott K9MA On 6/12/2023 6:28 PM, Da
For those who belong to Costco, I just got an email from them with a CyberPower UPS with a true sine wave on sale for $150. I have one and have no complaints. Jim N7US I, too, have found my Cyberpowe
I ordered two of them. If they don't work out, it is Costco and they take them back no questions asked. Wes N7WS Jim N7US I, too, have found my Cyberpower UPS to be RF quiet, even when it's running
Yep. Great advantage of buying there. Big companies like Costco do a lot of private label biz, with their own part number for a product that's also sold under another part number. My guess is that th
These got delivered Friday. I was appalled at the condition of the two boxes. The boxes had been severely damaged somewhere along the line and about a roll of package tape held them together. The
It's really hard to tell whether RFI you see with a probe like that is going to be an issue. They're most useful when you DO have an issue, and you're trying to track down the source. FWIW, I have a
CyberPower 1500VA Sine Wave UPS. Delivered from Costco - abysmally packed (only the display box, which was badly dented and torn). Only scuffs to unit due to protection of corners and display by form
Remember that K(YC ordered the model with Power Factor Correction (PFC). Products with PFC usually have better filtering characteristics. Costco does not stock it but it is available on Amazon: <http
Oops... K9YC Mike N2MS _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi