you don’t see BNC as often because it’s more expensive, bulkier, requires different crimping tool and has a separate soldered pin. but if you need to connect and disconnect things often and quickly, then it’s a good connector. i bet you’ve seen (RP-)SMA a lot instead, but this one is also more expensive than F, has separate pin and is too small to easily make a connector for common 75 ohm cables. reducing diameter would mean higher loss

i keep hearing that F stands for Flimsy. no idea where that came from, unless something is seriously wrong with crimping technique. i guess there’s a tradeoff between CCS or copper cable with durability of pin/center conductor vs bending radius, and some people don’t like how it turns out, while ignoring that it’s cheap and not really designed for multiple disconnections

but yeah, as long as everything is matched good-enough then it’s a cheap way to connect low loss, cheap cable (75 ohm only. otherwise i’m in the N/SMA/BNC camp, UHF connectors are unreasonably obsolete)

The context of the whole thread, though, was end-user, repeated, frequent connections for people who have to be reminded by a manual that the thing needs to be plugged in. Coax is horrible for that.

so you want BNC

power plug with 3 wires or 5 wires (3-phase) could be made safe-ish if there was a button at the very end that connected to a relay or something. but plug like this would be comically long for any practical power

i don’t think you’re supposed to hotplug soldering iron tip. besides it’s a simple thing, isn’t that just two resistors - one for heating element and another for measuring temperature? hard to break that. not sure about how ipod shuffle worked or what precautions were needed. also today USB can deliver power at higher voltages than it used to

Coax has only 2 conductors and it keeps impedance constant, unlike audio jack

There are two immediate problems with round USB. First one is that audio jack carries no power and it’s generally rather harmless for finals or microphone to have some contacts shorted or crossed for time when plug is inserted. USB, let’s even day just 4-pin, carries power and i’m not sure how well would either of devices react to having data bus connected to +5

The other problem is that USB is proper radiofrequency connector, unlike audio jack where anything goes. This means it has to be shielded and impedance has to be some specified value, which in practical terms means that there’s some specific ratio of metal to plastic and shape of conductors that has to be used. Barrel plugs would have way too low impedance and already bulky connector needs extra shielding which makes it even bigger

that site sits on .gov.ua, this is for various official things for government of Ukraine

like with any other country that has such presence

this is what your enemies would like to see. don’t have enemies? make some

Former OpenAI researcher Andrej Karpathy wrote on X that GPT-4.5 is better than GPT-4o but in ways that are subtle and difficult to express. “Everything is a little bit better and it’s awesome,” he wrote, “but also not exactly in ways that are trivial to point to.”

plebeian, you don’t understand, you’re sniffing our farts wrong

imagine getting out of high school during or after 2008 and deciding yes i need to fuck over common people harder

he’s training to be professional healthcare denier, there were many despicable choices going back for a decade or so

these people have memory of goldfish on ambien

if they had any spine, they could turn it around when opportunity comes. but i doubt they do

where downsides?

it’s not startup gambling if it’s embezzlement

i don’t think it helps his case that he’s using chatgpt as a lawyer

maybe it’s just inverse population density map

old lecturer at my maths-for-chemists* course used to say something like this before exam: “Please don’t try to invent new maths, I won’t stop you of course, but it’s a sign of great hubris to think that you’d outdo three thousand years of development in four hours. Just learn beforehand, it’ll be easier”

* a bit of linear algebra and calculus, just enough to get absolute basics of group theory as needed in spectroscopy and to solve one-electron Schrödinger equation for intro to computational chemistry

not only money runs out, it’s also some categories of military equipment. i mean, it’s not like russia will run out of tanks entirely, because they still have ongoing production, but most of what goes to front are increasingly old rustboxes reanimated in tank factories - because it’s faster than building new one, but that happens too.

according to perun, they’ll start running out of tanks, ifvs, apcs, things of this type somewhere in 2025 - that is, storages will be emptied and any replacements would have to be new, which means that replacements will come something like 5x slower. it’s a bit harder to say with artillery, because barrels have limited number of shots and it is known that barrels can be taken from towed guns to put them in self-propelled guns. but it’s also bad, even if it means there’s another year there