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Pf is getting into the weeds here, it was just thrown into the mix, but for the routine domestic user it has an astonishingly small impact. I was cautious about Pf being drawn into this as a metric for determining fault tolerance if you understand what I mean. It's a totally different concept, as I know you're aware. I *think* (but do not know) that most decent PSUs made over the last decade or so have some element of Pf correction, whether that's just a capacitor/inductor in passive topologies, moving into active I'm out-dragged in knowledge, it's not an area I've been more than tangentially involved in, beyond selectable L/C reactive components and a rough idea of how they work. SMPS noise is a ballache (I'm a 'ham') which is why I'm all too aware of UPSs issues with RF intrusion, and SMPSs in general. Like you've said, they're more than able to create interference in baseband AV signals if no consideration is given. We run about our most sensitive equipment in DC-DC using some lovely, but very old heavy linear regs' I had from my instrumentation days, it's a weird setup and it's woefully inefficient, but when we're down to trying to squeeze the absolute best out of a tape it's a step we've taken. We have climate monitoring in the suites as specified by some customers, it gets toasty warm with that lot running at full tilt, I can assure you. Extra credit for having 'hand-wound' transformers as it was Mrs RR(1) who wound them. A lot of this stuff is more robust than is made out, it's the insistence that a device is automatically 'trashed' should it ever be plugged directly into the mains I can't fathom. It's a low-risk exercise in the case of this device, ultimately if the devices have survived until this point, they're fairly robust. Your stuff about transient testing is interesting, I might model that circuit using those specifications for analysis. |
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And I don't understand your need to bloviate in these (supposed to be simple) conversations. Again, this is really quite simple: UPS are there to protect gear, battery power to allow you to safely shutdown operations. If you don't care about your gear, want to gamble it doesn't fail due to power events, well good for you. Most people aren't that careless when spending $$$$. In some cases, UPS allows you to use the gear for an extended period. For example, our router is on UPS. When power goes, assuming the node isn't down (as it also has backup power), we can still get online with tablets and laptops. Power on it lasts for hours. Contrary to whatever you wrongly think, most modern desktops require active PFC UPS with pure sine wave. Or no UPS. Your continual OT of these UPS threads is starting to annoy the OPs, and Site Staff. Stop. You made your opinion clear on the matter. Done. @dpalomaki gets it. :congrats: |
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