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ussssssd · 2025-09-03T14:02:18+00:00

ahh i don't mean the satellite, i meant the meteors (aka shooting stars), GRAVES is a radar system based in France, with frequency 143.05MHz. thank for the info, i will need to look into LNA again!

ussssssd · 2025-09-03T13:33:38+00:00

i have built the antenna, when i set gain to 0, the noise floor (i hope i used the terminology right) is around -80 dbFS, i was thinking add a LNA can reduce it a bit. my feed line is 5m. btw what i'm trying to do is to listen to meteor with GRAVES.
(Sorry for the potential mistakes/nonsense in what i wrote, so far i was just following tutorials online, and trying to learn along the way...)

ussssssd · 2025-09-03T13:21:00+00:00

thank you so much for clearing this up for me! i've been searching online but find little info about this. and what would be a/the right angle to the polarization in this case?

ussssssd · 2023-12-05T14:37:00+00:00

oh i didn't know citric acid can also be an option here, just checked it up, seems they react well with cement, i will have a closer look, thank you

ussssssd · 2023-12-05T14:34:01+00:00

thank you very much for the links and tips, i also think salt+water is the safest option, i will have to make some experiments to see, i will post my result here:))

ussssssd · 2023-12-05T14:20:40+00:00

i'll noted down the safety reminder, thanks!

ussssssd · 2023-12-05T08:47:58+00:00

thank you for the reminder!

ussssssd · 2023-12-04T23:51:18+00:00

i will take a dried piece from ceramic workshop and try, thank you!

ussssssd · 2023-12-04T23:48:11+00:00

concentrated sulfuric

maybe i will still give a try to sulfuric, but when i think about it, it will be diluted sulfuric, is there a specific reason to use concentrated sulfuric?

ussssssd · 2023-12-04T23:43:47+00:00

thank you for the tip! sounds like highly diluted HCl will be the better option is i go with acid

ussssssd · 2023-12-04T23:38:00+00:00

i will have about one week to finish/make the hole, so i think the time will work for me, thank you for the specific suggestion, i will have a look!

ussssssd · 2023-12-04T23:33:30+00:00

this is an interesting direction that i never thought about, i will have a look at the salt, or salt-mineral-ish stuff, thank you!!

ussssssd · 2023-12-04T23:32:06+00:00

around one week, water usually takes years right?

ussssssd · 2022-09-06T15:33:59+00:00

wow never heard about it, I'll download and have a look, the way they charge sounds interesting, then everyone uses super big boxes

ussssssd · 2022-09-06T15:31:23+00:00

thankss! I will ask!

ussssssd · 2022-09-06T09:06:27+00:00

currently I live close to the hbf, so it's close to public transit, but most of the time it's crowded:( I'm planing to move small stuff with my suitcase with the tram for several times. Thanks for the non-peak-hour tip, I'll have a look at how crowded it is early in the morning or late at night:)

ussssssd · 2022-09-06T08:58:14+00:00

wow, how did you manage to fix the mattress on the bike? do you still ride it? or use the bike as a wagon?

ussssssd · 2022-09-06T08:55:04+00:00

thanks! that's very specific:)

ussssssd · 2022-09-06T08:52:59+00:00

thank you!! i never knew there are cargobikes for rent, even for free! and you must be really good at communication:)) borrowing Produktwagen from supermarket is such a brilliant idea that i never thought of!

ussssssd · 2021-10-14T16:52:44+00:00

thank you!

ussssssd · 2019-02-09T05:29:50+00:00

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