The master craftsman will know where they can wing it and by how much, and this includes shitty tools

is that basque space program reference?

tvs were made before fr4 was a thing

that’s because the right thing is to switch to bike

TVs made to soviet design famously caught fire, this was before this all printed circuit board deal was perfected. they just used cardboard-like material for that, it was flammable, absorbed water over time, and there were too closely spaced traces with high voltage on them

People just don’t remember shit that broke down quickly

Maybe you can pull it off WW2 style by adding a couple % of aniline to unleaded gasoline

WW365 with Copilot

drop DOIs

onsite solvent recycling is a thing, what can’t be recycled can be burned for energy. chlorinated solvents require extra energy input because they’re less flammable, and extra corrosion resistance is required in equipment used for that

DCM is also about the only good solvent left that is also resistant to lewis acids. I think that some people were pushing for benzotrifluoride as a replacement, but it just straight up doesn’t work as well where i tried it

Tbf before “do it in DCM” was “do it in CCL4” or “do it in benzene”, DCM just works without nuking operator’s liver

Lots of these new green solvents are also annoyingly polar so perhaps they can be used as replacements of other polar solvents but not anything else. I’m not using cyrene, fuck that

TFA is used because it works and is shelf-stable. Replacements like HCl in ether or ethyl acetate are bitch to make and when these can be bought, they have to be refrigerated all the way. Straight up not worth the effort on small scale

that’s illegal (unless you own a zoo basically)

no no, it makes sense. alpha male, so not ready for release and bugs are to be expected

LG would be South Korea. Maybe it contacts tracks on PCB below and it’s some kind of semi-conductive rubber

Lithium-iron is about 2x more expensive, there might be different availability and energy use during manufacture is probably higher

Lead-acid batteries work if you don’t care about weight and lithium-iron phosphate if you do

AC also needs to deal with line resistance, and cheap, efficient multi-MW, multi-kV DC/DC converters aren’t there so far, but there are prototypes (and drop-in transformer replacements https://en.wikipedia.org/wiki/Solid-state_transformer) Advantage is that these converters can be more efficient than transformers and you don’t have to deal with reactive current (if DC). Obvious downside is that frequency control isn’t there

if power electronics get a bit better than they are now, we could switch to DC power transmission and DC/DC converters instead of transformers. bunch of infrastructure could be replaced one by one, but benefit is slight except for already used undersea cables

but on generation side, it’s either photovoltaics or spin a magnet

Somebody in the lab asks you to get them an E-plane bend or an H-plane bend. You can’t remember which way the fields go in the waveguide, but you don’t want to look stupid by asking. Don’t panic, there is an easy easy way to remember which is which. The E-plane bend is bent the “easy way”, and the H-plane bend is bent the “hard way”, which you can see in the photo below. If it isn’t obvious to you what is meant by easy and hard way when you are bending something of rectangular cross-section, it is not too late to consider a career shift to the software industry

Not really, there are also polyesters and polyamides. These used here are hydrocarbons, and turns out there’s a tool for that. You see, in oil refining there’s a lot of stuff manufactured that it’s useless without further processing, as in, after distillation and vacuum distillation you might end up with half of weight of oil or more as asphalt or heavy oils that barely can be sold. So in order to make them useful, these products are broken down into smaller molecules, and then are separated again. What they’re doing is similar to process called hydrocracking that is commonly used to turn heavy vacuum distillates, think something like motor oil or other greases, to diesel

If one were to make hydrogen producing solar farm specifically, this could have made sense if there were efficiency gains compared to pv + electrolyser. But there ain’t, and from what i understand won’t be