At least with 1950s tube equipment the voltage/current waveform at the outlet is mostly resistive. Tube rectifiers have much more resistance than semiconductor diodes, and so conduct over a wider range of the waveform and don't contribute as much to a bad power factor.
Now most everything runs on switching supplies with full-wave rectifier input. I recall something about power factor correction now being required of anything over 500 watts. If you're doing 1,000 watts (fortunately, PC case LEDs are efficient enough to be insignificant), you likely NEED power factor correction just to not blow a breaker on a 15 amp circuit. Power companies worry about "sine waves" with flat tops for good reason, something unimaginable 50 years ago.
All the silver/gold enthusiast (500W+) PC supplies have separate PFC IC's .... not bad at all. Antek , Seasonic , and all the rebranded Corsair (seasonic) have
the best infineon controllers. Phone chargers , laptop supplies , and many other Walmart electronics .. PFC ? whattttt...
"No-name" Asian supplies don't even bother with anything beyond a little passive filtering. Avoid those brightly glowing over-rated scam PC supplies that
are light as feather and rated for "peak??". Sort of like the audio PMPO scam. I have 3 HX550 Corsairs with Panasonic caps 2- 8 years old. I recapped the 400W
antec with 25V panasonics after a decade. The antec ran my core duo (2006) long ago , now it runs a I5 (2017). same supply.
the best infineon controllers. Phone chargers , laptop supplies , and many other Walmart electronics .. PFC ? whattttt...
"No-name" Asian supplies don't even bother with anything beyond a little passive filtering. Avoid those brightly glowing over-rated scam PC supplies that
are light as feather and rated for "peak??". Sort of like the audio PMPO scam. I have 3 HX550 Corsairs with Panasonic caps 2- 8 years old. I recapped the 400W
antec with 25V panasonics after a decade. The antec ran my core duo (2006) long ago , now it runs a I5 (2017). same supply.
C’mon jack. I’m, of course, referring to non-extinct humans. Homo erectus is an extinct species of human.
I learned, from experience, way back into the 1970's to not take things for face value.
I learned that superficiality, outside looks, could be deceiving at times.
Ya gotta look past the surface and dig/explore a little deeper into things.
Unfortunatly, a lot of people don't do that, they've gotten lazy.
The laziness being brought on mainly by technology, which is touted and believed by many as a "good thing".
For instance...
Cellphones - promoted as a convenience.
Automobile features - self-driving, self parking, etc. - why bother with manual steering of cars.
Remote controls - god forbid you have to endure the inconvenience of getting up off the couch to operate the TV set, just sit there, relax.
The list is endless.... making lazy slobs out of millions.
It creates a mindset in society that is hard if not impossible to break.
I learned that superficiality, outside looks, could be deceiving at times.
Ya gotta look past the surface and dig/explore a little deeper into things.
Unfortunatly, a lot of people don't do that, they've gotten lazy.
The laziness being brought on mainly by technology, which is touted and believed by many as a "good thing".
For instance...
Cellphones - promoted as a convenience.
Automobile features - self-driving, self parking, etc. - why bother with manual steering of cars.
Remote controls - god forbid you have to endure the inconvenience of getting up off the couch to operate the TV set, just sit there, relax.
The list is endless.... making lazy slobs out of millions.
It creates a mindset in society that is hard if not impossible to break.
Back now on the original topic of marketing and lies, etc....
A company called "bulbhead" has tv advertisments of various products.
None of them appeal to me, they look like cheap garbage.
One recent product is something "Space Triangles" - you slip them over a coathanger and they have a hook that allows you to hang another hanger, even daisy-chain them, to gain closet space.
But... here's the kicker..
Lately, their products have a warning of "supply chain issues" LOL!
Saying that "This offer may not last long, due to supply chain issues, so hurry now to place your order!"
SLICK advertising!
ANYthing to get you to "hurry up and buy"
But not so slick enough for me.
I don't want or need their junk.
Besides, doing a search for these products shows up many ticked-off customers complaining about hidden extra costs, product issues, etc.
A company called "bulbhead" has tv advertisments of various products.
None of them appeal to me, they look like cheap garbage.
One recent product is something "Space Triangles" - you slip them over a coathanger and they have a hook that allows you to hang another hanger, even daisy-chain them, to gain closet space.
But... here's the kicker..
Lately, their products have a warning of "supply chain issues" LOL!
Saying that "This offer may not last long, due to supply chain issues, so hurry now to place your order!"
SLICK advertising!
ANYthing to get you to "hurry up and buy"
But not so slick enough for me.
I don't want or need their junk.
Besides, doing a search for these products shows up many ticked-off customers complaining about hidden extra costs, product issues, etc.
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