I used to work at the Very Large Array, as an intern, building antennas, running cables, chasing down RFI, getting yelled at by astrophysicists... It was so much fun, and I miss it a lot.

@MatzeMaulwurf

9 ай бұрын

I scream at interns. Also fun.

Very nice! The Doppler effect was more caused by the Milky Way Galaxy rotation depending on where the antenna was pointed on the Milky Way arm. Really cool you got that the first time.

@Ratzfourtyfour

9 ай бұрын

Interesting. Earth is moving at 220km/s around the center of the galaxy, and as it rotates, it faces different 21cm sources at different relative velocities. I can't do the math tho, it's a mess of interfering rotations and sources lol.

@alphaadhito

8 ай бұрын

@@Ratzfourtyfour Well it might be a late reply but finally got the first data last week with 2.3 m antenna. And yeah, you can actually calculate the Doppler frequency and add the solar system rotation and earth rotation in the formula and we managed to calculate maybe within -/+ 5 km/s of theoretical calculation (RTL-SDR TCXO actually limits the accuracy to about 1.5 km/s but you can get GPS-DO receiver with 1000 times better accuracy). There's even an application called SDRAngel with Radio Astronomy plugin that can crunch more number beyond that but I ain't even touch that for a while as it's very complicated, lol. It's mind-blowing what today's technology especially the RTL SDR can offer!

SCIENCE!!! Your best video yet!! I hope you continue with this type of content.

Thank you. That was awesome, with such a cheap setup. I'm sure you will have inspired a lot of other people to follow your footsteps. We stand on the shoulders of giants :)

Very cool. Looking forward to more like this.

Fascinating material covered here! I have an old C band dish that needs a project like this. Hmmm...

@TechMindsOfficial

10 ай бұрын

Go for it!

I have a license and training in astronomy. it's one reason why I got into ham radio. This is something rhat will contribute to one of my projects.

Sorry I'm late to the party.... you just raised my interest!!! I've been trying to figure out something like what you did. But I was gonna use rotors for tracking... ie ham satellites etc. But this is on my bucket list!!!

Been eyeing that antenna for a while. Might just have to pick one up!

Just found this channel. Very Cool!

Thanks Matt, is one of my interest aswell. Hope to copy it soon most interesting

Thanks for the tip on the 1420 filter!

Thanks Matt, I've been interested in Radio Astronomy for a long time. Still have 2 Sat dishes to try out...

The fact that average people can do this at home is amazing. I totally got your point.

Thanks for this video! Viewing the thumbnail I thought you managed to get your hands on a government surplus dish antenna....oh well yours still works! Have a nice day!

@TechMindsOfficial

10 ай бұрын

haha... Well, maybe in the future I may acquire something very special :-)

GG!!! Awesome experiment and result!!!!

This sounds fantastic and very Seti League. I've been itching to do something similar and I hope I can get something like this set up.

@TechMindsOfficial

10 ай бұрын

You can do it!

loved the video

I’d highly recommend doing a Jovian Radio project, it takes some work but I think it’s absolutely awesome

@alphaadhito

8 ай бұрын

Concur!

Even though I didn't have a clue as to what you were talking about in most of this video, I still found it interesting and entertaining. Thanks!

@TechMindsOfficial

10 ай бұрын

Glad you enjoyed it!

Nice video Mate. I'm looking into drift scanning on the L band for the Hydrogen Line. Got all the bits, need to get started.

@TechMindsOfficial

10 ай бұрын

nice one mate! Let us know how you get on!

If you can increase your signaling average (sampling ever few milliseconds), you can look for Fast Radio Bursts (FRB's) which are poorly understood (like Aliens being a "serious" hypothesis level of not understood). Most of them at in the 1.4Ghz range, so it's well within reach of most people.

I do Astrophotography and am used to looking for Hydrogen Alpha (HA) Nebulae to photograph. I wonder how much of the sky that antenna is actually sampling. I'm curious if you were to mount it to let's say a computer controlled Equatorial Telescope Mount and use it #1 keep a target centered, but #2 scan the sky for other pockets of HA, you might be able to make discoveries that haven't been seen yet. Would be cool to write some software to visually map out the sky along with the perceived HA level.

@OldKing2

10 ай бұрын

kzread.info/dash/bejne/dZyrz6mmeaa3pbg.html&si=qShjvyWZ3MYsyZJJ

@OPIXdotWORLD

10 ай бұрын

nice chemtrails at 2.20

@chucknorris3984

9 ай бұрын

@@OPIXdotWORLD No, it's just perfectly safe condensed water vapor in a cold, moist section of the atmosphere created by absolutely completely perfectly safe, hot jet exhaust gas and particulate material from burning exponentially larger amounts of the same type of fossil fuel us pathetic wastes on the ground use. But remember, only those emissions are perfectly safe though. Not ours. And definitely not us eating burgers or a bear sh'tting in the woods.

@meloney

9 ай бұрын

​@@OPIXdotWORLD???

@OPIXdotWORLD

9 ай бұрын

@@meloney what dont u understand...?? from 2,27 to 2.40...

Very good.

Parabéns, você é um gênio!

Great video. Subbed...👍

@TechMindsOfficial

10 ай бұрын

Awesome, thank you!

Thanks for the great video’s. I wondered if you have used or might do a review on the Diamond BB7V? It looks like an interesting antenna!

Thanks ❤

Awesome!

@TechMindsOfficial

10 ай бұрын

Thank you! Cheers!

You can use the same technique used for meteor scatter in ham radio and do a form of meteor detection. Let me know if you would like more info .. and keep up the great work on your videos!

@paulatreides6779

10 ай бұрын

Is what you are describing some sort of a passive radar? If yes, it can be used to detect potentially UAPs?

@captainkoloth1631

10 ай бұрын

​@@paulatreides6779 No and no.

@danbrandon8545

10 ай бұрын

@paulatreides6779 here is a basic description When a meteor enters the Earth’s upper atmosphere it excites the air molecules, producing a streak of light and leaving a trail of ionization behind it kilometers long. This ionized trail may persist for less than 1 second up to several minutes, occasionally. This trail is capable of reflecting radio waves from transmitters located on the ground, similar to light reflecting from a mirrored surface. Meteor radio wave reflections are also called meteor scatter, or pings. In order to listen to meteor Scatter, you need a powerful transmitter in VHF band located not too close but not too far from you, we are using the video sync signal from a TV station in Canada, an Off Center Fed Dipole antenna, and a USB Software Defined Radio receiver.

@WayneMetcalf

10 ай бұрын

In the UK, it's usually achieved by detecting the fluctuations in the Graves radar array.

@milesprower6641

10 ай бұрын

@danbrandon8545 I'm interested in such a thing, even have an antenna set up but lack the knowledge

Suppose I wanted to connect 2, 3 or 4 of these small MESH antennas together, space them apart a certain distance to create one large receiving area. Would you know what kind of hardware/software I would need?

I wonder if you could use a radio telescope to listen to the lightning storms on Jupiter? I think some of the spaceborne instruments have detected it, but I didn't find anything right away saying if you could detect it on earth.

@danbrandon8545

10 ай бұрын

Do a search for radio jove

Fantastic drift-scan neutral hydrogen emission line radio telescope! Can you detect emission lines from other molecules such as carbon monoxide (CO) or Hydroxyl (OH) or even maser lines (microwave lasers)?

wow ! interesting ..

I'd love to know how they create those images of a radio telescope. Thanks brilliant vidro as always

@chucknorris3984

9 ай бұрын

I'd imagine there's some sort of software out there. I saw a video years ago of a wifi telescope/camera. They put it outside and saw right through into their apartment I think it was and the different strength signals made a detailed image of the objects within due to reflection and attenuation. It might have been taken down, but still search for it.

@alphaadhito

8 ай бұрын

For that extremely high-resolution image of i.e., the Black Hole from the Event Horizon Telescope, they used so called Interferometry which need multiple radio telescope array from across the world (literally a telescope a size of the Earth). You can see ALMA in Chille or more famously the VLA that made a cameo from the movie Contact :).

Interesting, I have what looks to be an identical antenna but it was sold for long distance WiFi links, so ~2.4GHz.

Good job (Too bad you could not review the GOES satellites because of your Location) Wish I had this Dish to Try the GOES Signal.. anyway.. (GOOD JOB !!) 🥇🥇🥇🥇🏆🏆🏆🏆 ACHIVEMENT ... WOW that's a lot of tape on the H1 LNA 😊

@TechMindsOfficial

10 ай бұрын

Yeh, I know! I may try an experiment on this soon.

@x_CrossHair_x

10 ай бұрын

Can't wait to see what you will do.. (Cuzzz Always Cool) or as you say Brilliant.. 73's@@TechMindsOfficial

I installed sdr# v. 1727 on my win7 machine and it runs. but there is no "PlugIns" option under the Hamburger. Any help?

Great video. I've wanted to do this, except my intent is to have the dish on a stepper motor gimbal with az/el capability. What I need is a coding person to write an app that will move the dish horizontally and vertically to scan a grid across the sky. By mapping the hydrogen signal strength in each cell of the grid we can convert the data to an actual visual presentation of the Milky Way. If you know anyone that can write such an app let me know! Thanks for the presentation. Love your channel. 73

@fitybux4664

10 ай бұрын

Weird. Why do you need a person for this? If you have the motors/controllers set up to be controlled from a serial port, I'm sure ChatGPT can help you whip up something in Python.

@tekspeditionplanet9109

10 ай бұрын

Hardly weird. But you make a good point. I hadn't thought of ChatGPT for writing an app. Interesting.

This is wonderful! What else could be detected with it- the Sun? Jupiter?

@TechMindsOfficial

10 ай бұрын

I'll be researching this for sure!

@Astrofrank

9 ай бұрын

Both are known radio objects.

@aerozg

9 ай бұрын

There is a similar project you can do called RadioJove: radiojove.gsfc.nasa.gov/

I think you can listen to the lightning on Jupiter in 17/18 MHz with a dongle..it's been along time but I think I remember it on TV...

@standupmackan

10 ай бұрын

Yup. I am currently doing this, but at around 21 MHz. Usually, when you get signals from Jupiter it's very broadband, all the way from maybe 15 MHz to 25 and above. (_I_ chose 21 MHz for my "telescope", because I don't have a lot of interference there). My biggest problem so far has been the sheer size of the antennae, since I don't have a house with a garden...

@johnm0jfe

10 ай бұрын

You can hear Saturn and Jupiter on hf radio around 21mhz

@dennis8019

3 ай бұрын

@@standupmackan are u guys joking? ? listning to jupiter? what?

@standupmackan

3 ай бұрын

@@dennis8019 yup! Jupiter’s moon Io have so powerful thunderstorms that you can pick up the signals from the lightnings, here on Earth, but they usually need quite directional antennae in order for the signals not to drown in earthly background noise. And sometimes fairly specialized filters, too.

And where would one download IF Average plugin?

Try VLF natural radio "auroral chorus, dawn chorus". :)

Hello What equipment do i need. Beginner Introduction please..

cool nice 73

I've got that far before. It's just not enough to do anything good with it. I used the GOES dish to do it. It's better with a dish at least 2x as big and a tuned feed for 1420MHz.

Is there the equivalent of an LNB to convert Ghz signals into a lower frequency and so reduce feeder losses. I appreciate that broadcast satellite frequencies are around 10 Ghz and maybe the gain of down converting is not worth the extra £ and complexity. Interesting video, thanks for uploading.

@TechMindsOfficial

10 ай бұрын

Yes, there is a product called "Ham it down" from NooElec. I have one here and will be doing a video on it soon. Thanks

@paulsengupta971

9 ай бұрын

The thing about these small SDR dongles is that they can be mounted very close to the receiving antenna, minimising losses. I have some ADS-B receiving antennas where I basically built the SDR receiver into the bottom of the antenna, then ran a USB cable from there.

But why the 21 cm peak dissapeared at a specific time???

Are there any citizen science schemes that collate radio data?

Have your tried using Satdump with this setup

@TechMindsOfficial

10 ай бұрын

Not yet, but I have that planned! Shhhhssss dont tell anyone.. :-)

@fernandoblazin

10 ай бұрын

@@TechMindsOfficial mum's the word

Whih software is used to ru run it

one of the things I am working on. yuo showed how to get results. First thing I want to try is modulating a laserbeam with sound. Thats radio amateurism without a license nidce video PE3FS

@TechMindsOfficial

10 ай бұрын

That would be so cool, I have often thought about that too! There must be a way of doing this. Shame you are not in the UK so we could work on the project together. Let me know if you get any results!

@paulsengupta971

9 ай бұрын

I used to experiment with stuff like this...originally with a helium neon laser, attaching a mirror to a speaker to reflect it. Results were, er, mixed! This was a long time ago now, probably back when CDs first became popular. I'd guess it would be feasible to electrically modulate a laser diode like in fibre optics. I'm guessing you want to modulate it with analogue audio rather than digital?

What do you mean "do to the doppler effect"? Why would the doppler effect show an rf spike? Doppler effect is an increase or decrease in frequency & at the speed of the earth's rotation a doppler effect would not show up since rf travels at nearly the speed of light & the earth's rotation is a fraction of that. 6.67 miles per second as oppose to 186,000 miles per second.

bro, where do you live? looks beautiful

@TechMindsOfficial

3 ай бұрын

Buckinghamshire in the UK :)

5:44 Why would it be local interference and not satellites coming into and going out of view?

@TechMindsOfficial

10 ай бұрын

You're right, it could be other satellites. For the purpose of the video any signal that is not what I was looking for could be classed as interference. Given the band we are looking at, and the direction the antenna is pointing, it is most likely local interference though.

use a telescope mount. then you can run it form inside .

I was hoping to see the insides of the SawBird. A rather incomplete review without even a quick look under the cover.

@TechMindsOfficial

10 ай бұрын

How about you buy one and then take a look inside. Pleb!

@AdrianBoyko

10 ай бұрын

@@TechMindsOfficial 😱 What an attitude

@TechMindsOfficial

10 ай бұрын

@@AdrianBoyko Well, for starters the video wasn’t a review video! So calling it an “incomplete review” was a bit knobbish Thing to say. Secondly, if you’d of asked me politely to show the insides of the sawbird I would of obliged. So, that’s the attitude.

@AdrianBoyko

10 ай бұрын

@@TechMindsOfficial You aren’t enjoying my sense of humor today! 😂 This was a direct quote of the guy who complained about you not having opened up the digirig. Don’t worry, we love your content!

@TechMindsOfficial

10 ай бұрын

@@AdrianBoyko Oh shit! I'm so sorry..! You must realise how many troll comments I get. Sorry dude, I should of realised you was taking the P*ss..! Sorry dude..

Nikola Tesla detected astronomical radio in the late 1800's

like 2.4 wifi antenna.

Im fascinated with radio astronomy. Im currently doings my masters in astrophysics. As part of my course im planning to make software that will map the milky way, there is already software to do this, but i feel like i would understand a whole lot more if i did it myself. So if you were to make a series of videos on the subject, that would definitely do it for me. Ive looked many times for a decent channal on radio astronomy, because that doesn't exist. 🤔😉

#UAP ? 😊

looks like that dish has a rather narrow field of view

Have you tried using it to look through walls?

youtube blocks everything cuz Im low income and cant afford to pay them for no ads. There show ads menu does not work. Cant show my children any of this now. Discriminate much?

@avidcoder3901

9 ай бұрын

What does this comment even mean? Proof reading is a thing.

@videogames8261

8 ай бұрын

what?

You just found another subscriber, 10/23/2023! KD8EFQ/73

Absolutely awesome , men🥹👍