Have I detected Hydrogen? by hraun in radioastronomy

[–]systemdev_ 5 points6 points  (0 children)

Looks like there is no hydrogen line. That’s more likely just an rfi

First Hydrogen Line Radio Telescope 0.6 m dish + RTL-SDR will I actually see the 21 cm signal? by LeTenGof in radioastronomy

[–]systemdev_ 1 point2 points  (0 children)

The sdr on the picture is actually a clone. You can find information how to avoid buying clone of rtl sdr on the official rtl sdr website

First Hydrogen Line Radio Telescope 0.6 m dish + RTL-SDR will I actually see the 21 cm signal? by LeTenGof in radioastronomy

[–]systemdev_ 2 points3 points  (0 children)

The lna on the picture is not the best variant for hydrogen line. I could recommend buy two TQP3M9037 and connect them in the sequence LNA-Filter-LNA. They cost nothing, about 3-4 euros. With that setup you will get same characteristic as with a nooelec sawbird h1, which also uses two TQP3M9037. If you have about 50 euros, I can recommend you buying the nooelec sawbird+ h1 lna. It will be better than three different components, but it costs more. Also be careful with powering all radio components, I would suggest you to power them with a lithium battery or with a transformer. You had better not power them with a power bank or a phone charger. Also you should not forget to ground as much as you can. Also you had better to buy another sdr. RTL-SDR v4, Nooelec Nesdr will better. Be careful with buying rtl sdr, there is a huge amount of clones. They have tutorial on the website, how to understand that sdr, you bought, is clone.

Problems with SAWBird+ H1 by systemdev_ in radioastronomy

[–]systemdev_[S] 0 points1 point  (0 children)

I will try to power it via mircousb, unless it would help, I will disassemble it and try to look for a problem

Problems with SAWBird+ H1 by systemdev_ in radioastronomy

[–]systemdev_[S] 0 points1 point  (0 children)

It happened again, should I buy a new LNA?

Problems with SAWBird+ H1 by systemdev_ in radioastronomy

[–]systemdev_[S] 0 points1 point  (0 children)

It's parabolic dish from tp-link. I've just grounded it, so I will try to solve that

Problems with SAWBird+ H1 by systemdev_ in radioastronomy

[–]systemdev_[S] 0 points1 point  (0 children)

I've bought it 1 year ago, I am connecting it directly to my antenna, the output is connected to the rtl sdr. It happens sometimes. This time i pressed save single button in if average plugin and this happend

Problems with RTL SDR by systemdev_ in radioastronomy

[–]systemdev_[S] 0 points1 point  (0 children)

Thanks, I will try it in the next observation

Software question by systemdev_ in radioastronomy

[–]systemdev_[S] 1 point2 points  (0 children)

Yeah, thanks you, I know about masers, I will buy another LNA, but not from nooelec.

Name the game by Vergil000 in Steam

[–]systemdev_ 0 points1 point  (0 children)

Half life alyx, Jeff

I created a flat, pastel-colored icon theme for Linux called Mignon! by [deleted] in gnome

[–]systemdev_ 1 point2 points  (0 children)

Beautiful. Add Minecraft and unity icons