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Comment Re:Ha! (Score 1) 57

Thanks. I seem to recall some spectrum analyzer plots that suggested that ultrafast and Schottky diodes made it easier to suppress the RF created when the diode switches. It always seemed counterintuitive to me.

Now I understand why you called a B+ of 750V "conservative". 845 is a brute of a tube, and I'd love to hear an amp using one.

Comment Re:Ha! (Score 1) 57

Cool! I have some questions - no expectation of answers of course, 'cause we all have things to do beyond posting on Slashdot.

What output tube did you use in the SET amp? Did you use ultrafast diodes in the HV bridge? In your current amp, are the output tubes EL84?

Regarding triode-wiring, I've read good things about connecting the screen grid to the plate using a Zener and cap instead of just a resistor.

Love the toroidal output transformer idea, but I imagine it's a bit expen$ive...

Comment Re:Ha! (Score 1) 57

Just curious - push-pull or single-ended? Are the outputs triode, triode-wired pentode, pentode, ultralinear, or OTL? Tube or solid-state rectifiers? Stereo or dual-mono?

Not being nosy - just have an interest in the subject, as you can probably tell. If you're interested in the circuit topology angle as well as enjoying the sound of tube amps, you may find this site worthwhile: http://nutshellhifi.com/ My personal favourites are "The Hidden Harmonics behind THD" and "Evolution of THD".

Comment Re:So how do these work? Phase matching? (Score 1) 239

You and I must be of a similar age. I too remember when they were simply called GFIs rather than GFCIs. I came across the acronym before I knew what the 'C' stands for and was confused.

Fun story: I remember a Reader's Digest article from back when GFIs were first introduced. Somebody who was selling or promoting them used his own daughter as a test subject for demonstrations. She was sitting in a bathtub when Dad dropped a plugged-in-and-playing-music radio into the tub with her.

Comment Re:Why did they have to? (Score 5, Insightful) 239

Why did this require legislative approval? If you want to plug something in at your house, who's to say you can't?

Shouldn't it be the other way around? With government stepping in if something is shown to be too dangerous to have at a house, not presumptively saying, "you can't have that until we think about it".

The legislative approach chosen here is for pretty much the same reason that people can't re-wire their homes without approval and inspection: because doing it wrong can endanger the lives and property of other people. In this case, feeding power INTO an outlet may have bad consequences which are not immediately apparent.

YOUR right to rugged individualism and doing whatever the hell you want, ends abruptly at the border of MY right to safety and security. That's a precondition of cooperative, civilized society.

Legislation is needed to enforce that border in cases where people make mistakes or act in ignorance. It's also needed for people who tend to not understand the necessity of such borders. You know - those folks who feel that their selfish pride "Trumps" such trivial considerations as community safety.

Comment Re:So how do these work? Phase matching? (Score 1) 239

It has no way to detect if it is discharging its load through a lamp or an electrician.

I suspect that plugging the panels only into GFCI-equipped outlets would address a large part of this problem. These outlets don't care whether the power is going from breaker panel to outlet or vice versa - they only care whether the currents on Line and Neutral are equal.

Of course, an electrician could get caught across Line and Neutral, in which case the GFCI wouldn't trip. But the best electricians, (or at least the best ones still alive), test for voltage before they put their bodies between Line and Neutral or Line and Ground. And in general, they reflexively avoid touching Line and (Neutral or Ground) at the same time anyway.

It wouldn't surprise me if this practice of feeding power into domestic outlets gave rise to miniature Non-Contact Voltage Sensors; these would clip to a wire, and would light up and squawk if an AC potential suddenly appears.

Comment Surface? (Score 1) 31

Google says the app will "surface what matters to you."

Will it "surface" an end to Google raping our privacy and shoving LLMs up everybody's ass? No? Then it's not "surfacing" anything which matters to me.

This seems like the perfect tool for creating perfect tools who live in echo chambers of their own making and think their farts smell like roses.

Comment What could possibly go wrong? (Score 1) 185

... a side-radar that detects if a cyclist or vehicle is approaching, and delays the release of the electronic door lock "until the danger passes."

In other words, there is now an even more complex mechanism - with an even higher likelihood of failing - which could trap a passenger in the car, resulting in injury or death. Bravo!

Comment Well duh! (Score 3, Informative) 42

I've been warning about this since I first heard about Microsoft and other tech giants involved in setting school curricula, discounting or giving away computers for schools, etc. So have many, many others. The broligarchs co-opting real education in favour of job training in order to provide themselves with cheap and plentiful wage slaves was trivially predictable, and oft predicted.

As for training materials which "double as marketing or indoctrination": Again, Duh! Anybody who seems at all surprised about this is either extremely gullible or baldly disingenuous.

Comment Re:Weasel words (Score 2) 64

"Associated with" means correlation without causation.

If you had looked into this further - as I did when I first learned of it more than a year ago - you would understand that there IS a clear causal link.

Researchers fed participants sugar alcohols - such as xylitol and erythritol - under controlled conditions. They then took blood samples and discovered that the blood of those participants experienced a marked increase in the likelihood of blood clots forming - for up to three days after the last consumption. GoogleAI dug up this Cleveland Clinic quote: "Consuming typical dietary amounts of erythritol or xylitol makes blood platelets—the cells responsible for clotting—more sensitive and prone to overreacting".

IIRC these tests were done to prove or disprove statistical correlation between sugar alcohol consumption and blood clots. Regardless, there is a clear, clinically demonstrated causal link between sugar alcohol consumption and increased clotting; and there is a clear causal link between blood clots and heart attacks. If A increases B, and B causes C, then more of B will result in more instances of C.

As an aside, it seems likely to me that these sweeteners also increase the risk of strokes. That's another reason why I no longer consume them.

Comment Where do I sign? (Score 4, Interesting) 33

As a heart attack survivor I'd be happy to have this shot. Between that and a strict ketogenic diet I could reverse my atherosclerosis and vastly reduce my chances of both heart attack and stroke.

In case you're wondering - yes, it really is possible to get rid of arterial plaques. The calcium part of the plaques will always remain, but that's not the dangerous part of the plaques. The killer is the sacs of pus which are part of the plaques, they're what become dislodged and cause heart attack and/or stroke. Diet and lifestyle changes can reduce those pus sacs drastically, though it was long believed that once they were present they were permanent.

I also think that the likelihood of dementia goes down when one manages to reduce atherosclerosis, but I'm not certain of that.

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