LH0ezVT

joined 9 months ago
[–] LH0ezVT 3 points 2 days ago

Ich sehe schon, es hilft nichts, ich muss mich mal mit Kurzwelle beschäftigen

[–] LH0ezVT 1 points 3 days ago

Unfortunately yes. People wanted this. They still want this. But people were also cheering for like, Mao even after he put millions of his own citizens into the ground, so who knows

[–] LH0ezVT -1 points 4 days ago

And? Seems like your definition and this community's definition of "science memes" differ. Who cares. What are we even arguing about?

[–] LH0ezVT 2 points 4 days ago
[–] LH0ezVT 2 points 4 days ago (2 children)

My dude, it's right there in the description

A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.

Honestly, I have no idea what you are trying to argue

[–] LH0ezVT 17 points 4 days ago

What the actual fuck. You know, I lock the screen because I don't want people to see what I am doing.

[–] LH0ezVT 10 points 4 days ago (2 children)

"Meh, what is the worst that could happen?"

[–] LH0ezVT 9 points 4 days ago (2 children)

Add telegram, threema, another matrix client for that other server and WhatsApp for some old friends to it

[–] LH0ezVT 0 points 5 days ago (2 children)

Yeah, that is why it was justified to shoot protesters

If that’s what you think I’m suggesting, you need to work on your reading comprehension.

[...]

Are you suggesting it would have been better to just let the fascists seize power?

...

[–] LH0ezVT 6 points 5 days ago

And this burden of proof is on the accuser.

I don't doubt the stories, but a court would see it in a different way for a good reason. It's hard to find a solution between slander and rightfully calling someone out.

[–] LH0ezVT 1 points 5 days ago

I can recommend looking into "science days" and stuff like that. It makes you a lot more hopeful for the future to see a lot of curious, open-minded 12-year olds.

And then they likely become the usual cynic adults, but hey, you tried.

[–] LH0ezVT 3 points 5 days ago* (last edited 5 days ago)

Thanks. I only heard about Delft from a woman studying there, and didn't hear any complaints. I guess PhD students cannot run as easily, so they get the short end :(

Actually, I was loosely considering applying there, this made sure I won't. That stuff needs to be made more public, so that their reputation noticeably suffers. Only then will people care to enact change.

 

cross-posted from: https://sh.itjust.works/post/34142424

Picture from a hike back in January. I need to go outside more often ;)

 

cross-posted from: https://sh.itjust.works/post/34507515

How do you test your antenna idea? Well, our approach was to get a portable network analyzer that can show received dBm, put a commercial antenna on it, and strap the whole thing to a PVC pipe (for insulation and to get repeatable height). Then, zip-tie a cough drop to the PTT of a walkie talkie set to low power, so that it transmits continuously.

Now you can walk around your contraption with your Drain Pipe of RF measuring, and get a (rough qualitative) idea of how the pattern looks like. Much to my surprise, it actually worked.

 

How do you test your antenna idea? Well, our approach was to get a portable network analyzer that can show received dBm, put a commercial antenna on it, and strap the whole thing to a PVC pipe (for insulation and to get repeatable height). Then, zip-tie a cough drop to the PTT of a walkie talkie set to low power, so that it transmits continuously.

Now you can walk around your contraption with your Drain Pipe of RF measuring, and get a (rough qualitative) idea of how the pattern looks like. Much to my surprise, it actually worked.

15
submitted 1 week ago* (last edited 1 week ago) by LH0ezVT to c/amateur_radio
 

Picture from a hike back in January. I need to go outside more often ;)

 

cross-posted from: https://sh.itjust.works/post/29055031

My first magnetic loop for 2m :)

Really simple construction: bent ca. 2mm brass pipe soldered directly to the outside of an SMA plug, inside of the plug soldered to the red wire as "input coil". Tunable by squeezing the ends more or less close together.

SWR of <1.2 at resonance, not bad. Impedance is at roughly 44+j2 Ohm, also not bad for totally eyeballing it without any prior calculations.

I can reach the nearest 2m relais just fine at 2W, although to be fair I can do the same with a short whip antenna. More testing to follow. Holy shit, this actually works!

 

My first magnetic loop for 2m :)

Really simple construction: bent ca. 2mm brass pipe soldered directly to the outside of an SMA plug, inside of the plug soldered to the red wire as "input coil". Tunable by squeezing the ends more or less close together.

SWR of <1.2 at resonance, not bad. Impedance is at roughly 44+j2 Ohm, also not bad for totally eyeballing it without any prior calculations.

I can reach the nearest 2m relais just fine at 2W, although to be fair I can do the same with a short whip antenna. More testing to follow. Holy shit, this actually works!

 

It will widen your horizon, they said. And here I was, foolishly thinking I could get away with half-assing statistics during my degree.

423
Based on a true story (sh.itjust.works)
submitted 6 months ago by LH0ezVT to c/[email protected]
 

Turns out the status quo of Linux memory management somehow works pretty damn okay, nobody seems to really know why, and nobody cares.

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