fullsquare

joined 1 year ago
[–] fullsquare@awful.systems 2 points 1 month ago (2 children)

i don't think it would go the way you think it would go

[–] fullsquare@awful.systems 0 points 1 month ago* (last edited 1 month ago) (3 children)

right, let's see... they propped up unpopular (some 70% iranians oppose islamic republic rule, source), authoritarian, religious minority rule (only 32% iranians reported to be shia in 2020 survey, so before 2022 protests, it might be even less today), that was in a constant state of crisis and when president nho dinh diem got couped and killed, people danced on the streets (iranians burned down mosques and statue of soleimani during january protests). yeah, maybe iran is like vietnam after all, to be more specific like south vietnam during buddhist crisis

i don't think that regular iranian population, that protested every year in almost decade and these protests were all met with crackdowns, mostly deadly, would like to see islamic republic rule to continue. neither i have heard anything about ground invasion, so all you've got out there is couple of pilots (officers) in the air and some more on ships

[–] fullsquare@awful.systems 1 points 1 month ago

except irgc and friends, nobody's sticking out their neck for theocracy and ayatollah, definitely not majority of iranian population (survey from 2024, and this is before irgc did 4 srebrenicas), and i'm not even sure about allegiances of regular military (artesh, not irgc. i heard that irgc disarmed artesh just before january crackdown, not very sure about it). let alone handful of pilots and marine officers that would conduct bombardment

[–] fullsquare@awful.systems 2 points 1 month ago

i think that preferred contact is by matrix

[–] fullsquare@awful.systems 2 points 1 month ago (10 children)

have you? vietnam was backed by soviet union and china when these states were at peak performance, and north vietnamese government was genuinely popular. iran today is not it, who's gonna stand up for them, fucking north korea? mullah's regime doesn't seem to be popular either https://gamaan.org/wp-content/uploads/2020/09/GAMAAN-Iran-Religion-Survey-2020-English.pdf also iranian air defences were already shown to be unable of touching american aircraft last year, and nobody's talking about ground invasion

[–] fullsquare@awful.systems 2 points 1 month ago

Skin depth is larger in aluminum but not enough to balance out its lower conductivity, copper is better material taking all into account, in practice both are good. If opposite was true we'd use lead or zinc for conductors. There are satellite microwave parts made out of aluminium (low weight) coated sequentially with zinc (bonding layer), copper (better conductivity), thin layer of silver (even better conductivity) and then gold (actually not thick enough to contribute, this one is for corrosion protection)

[–] fullsquare@awful.systems 43 points 1 month ago

he's either out of fucks, or knows exactly what he's doing

[–] fullsquare@awful.systems 8 points 1 month ago* (last edited 1 month ago)

also ignoring that natanz was actually effectively airgapped, and was knowingly infected by another country's contractor's usb stick, working on behalf of dutch intelligence service

[–] fullsquare@awful.systems 2 points 1 month ago* (last edited 1 month ago) (2 children)

the thing with using aluminum tape is that you can get away with very small thickness, because current flows only in top tens of micrometers depending on band. you can just roll up, say, 5cm wide, 0.5mm thick aluminum tape and have riveted/brazed/spot welded short length of 2mm thick bar to the ends for connecting capacitor. the problem is with mechanical stability of this setup, which is why you see pipes and thicker bars, bicycle rims etc, and here you would need some kind of horizontal bars for loop to more or less keep shape

with braid you get a lot of contacts between wires, and i'm not sure that resistance of them would be low unless tire is fully inflated. keep in mind that copper in contact with some grades of rubber develops copper sulfide film. maybe you can put short U-turn within loop at end opposite of capacitor and have adjustable shorting bar there. adjustable capacitor is more common by far, because if you can adjust it widely enough, you can get to different bands

if you're going for portable operation, wire dipole is probably the better way to go. cheaper, lighter, more efficient, you can roll it up and fit in your pocket. if you're operating out of a car, you don't need to fold magloop just lay it flat in the trunk

[–] fullsquare@awful.systems 29 points 1 month ago* (last edited 1 month ago) (3 children)

"has potential" and "could" but never "is"

90% of drugs that enter clinical trials, fail them

"All day Astronomy" seems to be a weird place to take medical news from

[–] fullsquare@awful.systems 3 points 1 month ago* (last edited 1 month ago) (4 children)

i'd expect shield to fray and core to bend with arrangement like this. if you just slide piece of pipe (can be rectangular, or U-shaped) it should be more durable. you'd be surprised at voltages developing there, even with 4W online calculators suggest something in 1kV range. 100W is over 5kV (voltage scales as square root of power)

btw if you don't need it collapsible, consider using bicycle rim as loop, or some kind of wide aluminum tape, as it has much higher equivalent diameter than coax (less losses)

[–] fullsquare@awful.systems 5 points 1 month ago* (last edited 1 month ago) (6 children)

you can add in parallel small adjustable capacitor, made from two or maybe four coax cores with some kind of sliding conductive sleeve around them all (piece of copper pipe moved by screw) this way you should be able to tune to any channel within cb band

additionally, you made your loop suitable for higher power than was previously (magloops tend to be limited by voltage across capacitor). if you use coax with foam core, capacitance per mm will be lower still. for adjusting, you can get away with only clipping away shield with nail clippers

view more: ‹ prev next ›