Check first on a smith chart whether transmission line that you can easily make or get and adjust its length has proper impedance for both source and antenna. The shorter length matching section has, the wider bandwidth you’ll get. There are typically two solutions, of which one is better. Ideally you’d like to have transmission line impedance a bit lower than what would be needed if only transmission line part was used (without stub)

If you want to make a yagi, or mount antenna close to a mast and don’t care particularly hard about extremely uniform coverage, you can modify impedance by changing distance to reflector. If you want to use something like this https://www.wa5vjb.com/yagi-pdf/cheapyagi.pdf then this antenna (radiating element) is already unbalanced and doesn’t need balun that badly

I don’t know if you need common current mode choke like this, it’s probably overkill, popping 3-4 ferrite beads on normal sized coax should be enough. Some people don’t even use it at all and things still work for them. You can also always use folded balun or sleeve balun as a common mode current choke. This toroid is only 20mm in diameter or so, and RG174 has minimum bending radius 6mm, so it’s abused a bit but not that much. It’s probably good for lower bands like 6m too. Alternative is to use a pair of twisted wire in parallel (these have 100 ohm impedance or so, two in parallel are closer to 50) wound on ferrite (more common on HF), and if size restrictions exist, you can use tall and narrow non-split ferrite bead instead of wide and short toroid like this one i’ve used. Also i made it this way because that’s what i had in my drawer. Maybe it was not balun that was narrowband, but radiating element is a limitation instead?

that’s RG174, there’s only 25cm of it or so, so loss is probably not a huge concern (53dB/100m at 400MHz, so 0.13dB), and that common mode choke is probably a bit too much anyway

not much? i don’t have scale but 150g perhaps? i think that if you don’t need it waterproof then you can just extend wires, use them for support and get rid of case entirely. this would require sturdier shorting bar and some spacers probably but would be more compact

it’s 80cm long and can’t be folded, so if that’s portable enough for you, then yes

the point of this antenna is that it has something about 2-3dB gain over dipole, if you don’t need this a lots of smaller antennas with dipole gain exist

e: and also despite what its size could suggest it’s a single band antenna, this one is for 70cm but if you have space for 2m (2.3m long) then i think it still should be practical

in some cases, on the power of the “fuck that other other guy” school of geopolitics, this can be avoided. https://en.wikipedia.org/wiki/2024_Iran–Pakistan_border_skirmishes “you see, we actually targeted separatists” “yeah we also targeted separatists let’s call it even” it also requires certain degree of diplomatic finesse that trump lacks, and there’s no good reason for strikes in the first place considering that dea coordinated with mexican police (?) previously, so they could just continue doing that

i’ll have you know that social contract that formed in russia after 90s looks just like that: citizens fuck off from politics in return for some prosperity. every time when russian state expected that that won’t last due to things like 2008 crisis or covid or what have you, they started a war as a distraction and to rally around the flag some nationalists. now they’re on 4th attempt, this one was due to post-covid recession. difference is, this time they were high on their own supply of propaganda and planned accordingly. they also can’t back down because they see it as a weakness, and that would mean a coup

I know that Abe was PM since always, but he’s dead for almost three years now

remember, the entire time until bombs dropped Goldblum wasn’t sure that if it was an elaborate bit

at least it’s not telegram

“i just hate bailing out europe again”

Dense motherfucker doesn’t know where his bread is buttered. Status of dollar as global reserve currency hinges on free maritime trade, on top of sheer amount of oil that passes through that place and american sensitivity to energy prices

Not to mention that they’re cause of greater share of instability in the region

it wasn’t worth it with covid and all it did was a magnet for spurious, ill-understood effects. it isn’t worth it even if you throw a chatbot at it, especially considering how dogshit these things are at anything factual https://cen.acs.org/pharmaceuticals/drug-discovery/Is-drug-repurposing-worth-the-effort/99/i3 https://www.science.org/content/blog-post/drug-repurposing-how-often-does-it-work

technically it was also not a “violation of ceasefire” because putin said any ceasefire can only happen only after all western military aid and intelligence sharing are stopped. all, not just american. clown shit

they specifically did target energy infrastructure so yes, they did https://kyivindependent.com/zelensky-trump-to-hold-a-conversation-on-march-19/

fusion at least doesn’t require breaking laws of thermodynamics to work and has stable funding from militaries of nations that field nuclear weapons. funding for synthetic meat depends on what bad scifi current oligarchs were fans of 30 years ago

it’s not a business, it’s a set of startup pitches for people who believe in californian ideology. you’ll make a great vc, never let reality and limitations of physics and biology get in way of your plans

that’s the spirit

we don’t even know how little we know about finer details of immunology

but you know that? go and sell this idea somewhere in bay area. it doesn’t matter if it’s all wishful thinking, i won’t stop you, and maybe you’ll get to meet Elizabeth Holmes

yeah it’s maximalist and in some ways impractical, not to mention some other considerations like carbon emissions

lab-grown meat is a dead end grift and you should have known better. unless you think that prices in range of $10k/kg are sustainable and affordable, that is, or maybe you live in world of sfba announcements. this article is from 2021 https://web.archive.org/web/20241208141305/https://thecounter.org/lab-grown-cultivated-meat-cost-at-scale/

republicans chasing ghosts, episode 2137

outside of silicon valley marketing materials, lab-grown meat is ridiculously expensive or straight up doesn’t exist. deer has immune system, grasshopper has immune system, stainless steel reactor full of cell suspension doesn’t. in order to prevent entire batch turning into mold or something, every starting material has to be pharma-grade and every operation has to be performed in sterile technique. it’s all fine for products like insulin or vaccines where single dose fits easily in sub-mg range, but if you try to price meat like this, it won’t be ever competitive for this reason alone.

but it gets worse, because people who try to do that are some random techbros without engineering background. strangely enough, this doesn’t matter, because every enterprise of this kind just rides on VC money. predictably, they burn it all. as long as you can attract it, things are good and for that all you need is good pitch. We’ll solve single cell meat with nanotechnology! We’ll solve single cell meat with 3d-printing! We’ll solve single cell meat with blockchain! We’ll solve single-cell meat with chatbots!

if you believe these people, world is simple and future is bright. i know many of you all on lemmy do.

i’ll say more: these people are selling imagined future where you can save the world in some measure (go vegan), and you don’t have to give up anything in the process (eating meat), as long as you Buy Our Product! then there are credulous marks primed for luxurious gay space consumerism, but magic tech that allows for it is just beyond the corner, then they disappear. but people still believe, and are disappointed when they have to make even tiny sacrifice on their own. newsflash dipshit: future won’t be convenient