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- Опубліковано 22 лип 2024
- In this video series, we are building a ground station for a geostationary satellite and try to talk to a Swiss guy in Antarctica. It is a bonus series and not directly related to the regular topics of the channel. It is strongly suggested to start watching at the beginning of the playlist.
I am a proud Patreon of GreatScott!, Electroboom, Electronoobs, EEVblog, and others
My HAMradio channel: / @hb9bla
Links (also from other QO-100 videos):
QO-100: Playlist: • HAM Radio
POTY instruction: • Montage antenne POTY p...
POTY antenna: www.passion-radio.com/satelli...
Adalm Pluto SDR Receiver: amzn.to/3fSQPxk
PLL LNBs: www.passion-radio.com/satelli...
Green LNB (good for external clock modification): ebay.to/2WV3reR
Pre-amplifier: s.click.aliexpress.com/e/_dUe...
20W PA SG-Labs ("Bulgarian"): www.sg-lab.com/AMP2400v3/amp2...
20W amplifier ("Chinese"): s.click.aliexpress.com/e/_dWL...
8W amplifier: s.click.aliexpress.com/e/_dZt... or amzn.to/2SKoBLv
Power Meter: s.click.aliexpress.com/e/_Bfg... or amzn.to/35FNdtV
SMA torque wrench: s.click.aliexpress.com/e/_d7o... or amzn.to/2zeEG5b
50W Attenuator (not tested): s.click.aliexpress.com/e/_dZA...
GPSDO Leo Bodnar: www.leobodnar.com/shop/index.p...
Filter design: rf-tools.com/lc-filter/
Adalm Pluto Hack: tbspace.de/plutosdrclockinput...
LNB Hack: ea3cno.wordpress.com/2019/09/...
K3NG Keyer: github.com/k3ng/k3ng_cw_keyer
Begali keys (Say hello to Bruna from me): www.i2rtf.com/signature.html with black finish and optional blue paddles
The links above usually are affiliate links which support the channel (no additional cost for you).
Supporting Material and Blog Page: www.sensorsiot.org
Github: www.github.com/sensorsiot
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Congrats on getting a signal up and back. I remember the first time I did that, so exciting. You know it's genuine and not a spurious local effect because of the time delay!
True! I still remember when I saw the huge antennas for communication to the Geostationary satellites in the 70s and 80s. I never thought I will be able to do this myself on my roof
Hi Andreas
As a fellow Radio Amateur I would like to congratulate you on your first satcomm contact, I am at the other end of the spectrum HF Voice and Data.
I too am an keen experimenter; to increase my knowledge, killing of equipment is a key part of learning, you learn more from your failures then your successes. Having killed x1 Raspberry Pi, x2 Arduino TTGO, x1 PSU, x1 430Mhz transceiver, and more; I do not remember !
Keep up the good work.
Chud M1PUP QTH London
So I think we play in the same league concerning killed parts ;-) At least most parts these days are not too expensive.
This series has turned out to be more than I expected. Very interesting, and I've learned new things. I'm looking forward to the Antartican link up, and what you do next.
Thank you. The same here: It got bigger and bigger ;-)
Great! Many thanks for your time.
You are welcome!
But finally congrats for making it possible.... mission accomplished!
Not yet. The goal still is antarctica...
@@AndreasSpiess yes but everything is ready now, so the rest should be piece of 🍰
Love this series! Glad to see you are having success.
Glad you enjoy it! So it is worthwhile to create it.
Great bonus video series! Including valuable hints, as for example about not to rotate the central part of a SMA connector, etc.
Glad you liked the video!
absolutely love these bonus videos thank you
You are welcome!
you just demonstrated why I put a decent size heatsink and a 80mm fan on my 2.4GHz PA. I like not having to worry about temperatures.
A thermocouple on the backside of the PCB, right behind the Transistor, mounted with a tiny dab of thermal paste and some kepton tape, works well for temporary temperature monitoring.
This is for sure a good solution. I ordered some thermal switches which cut the power off when above a particular temperature. As simple protection it should work.
@@AndreasSpiess Yes very effective. I used the same after frying a Peltier effect device
Awesome to see it working! Thanks Swiss guy! 😎
You are welcome. I also was impressed when It worked the first time.
Very cool project. Looking forward to more!
Thanks!
Oh God! Andreas! I recognize when some one has the radio in the blood! You not only transmit the knowledge , but also the passion. This is the very old school Ham Radio from the 70's refreshed... 73 DX
For sure you are right with radio in the blood!
Wonderful video, thank you.
Glad you enjoyed it!
K1TE, Bradshaw, an hour south of Boston at the Sandwich STEM Academy. amazing playing catch up, here on the bonus material. I am binge watching, tnx and 73!
You probably find some stuff on this channel for your institution. It is good to educate young people in electronics! 73 de HB9BLA
This whole series was way over my head but I enjoyed it very much nevertheless. Communicating with satellites is super cool.
True. Just yesterday I had contact with a few other HAM operators using this satellite...
I'm really impressed 👏👏👏
Thank you!
So cool, congrats for the QSOs
Thank you!
Many thanks for sharinng this great project with us... and sorry for magicsmoked hardware !
Sometimes things have to happen that you pay more attention in the future...
For sure i will stay tune. Congrat to you..
Thank you :-)
Interesting as always
Thanks for sharing 👍😁
You are welcome!
Glad to see a new video!
:-)
Congratulations !!
Thank you!!
very nice Andreas... project is coming along nicely... pity ya fried ya PA and Pluto...especially the pluto..its a nice looking SDR
I got one very fast from Mouser. So it is only the financial damage...
Thank you Andreas for this satellite series. I surely will follow your footsteps and will try it myself; probably also by frying the power FETs... ;-) Stefan, HB9GZE
I just returned from the Swiss round on 10‘489‘740 MHz. They were happy with my signal ;-) So maybe you join, too one day.
My w* is also good at leaving things on the stove while attending visitors :-). A good use case for sensors and microcontrollers. Great you got things sorted out eventually !
At least I have friends visiting me ;-)
great, finally another interesting video on talking to Antarctica. Thought you gave up...
You can ask my wife: Rarely I give up my important plans ;-)
@@AndreasSpiess ...so your "hunt 4 results" impresses them ladies too ...including her 💃 - Tnx 4 the vid. We'll meet!
So So good wow...
Thank you!
Very cool
Thank you! I liked the echo from space!
Awesome!!
Thanks!
Awesome! I enjoy your videos. Very knowledgeable and educational.
Thank you!
WB9ZDS - Chuck
Glad you like them! 73 de HB9BLA
I do not know anything about sdr but this video was super interesting! I hope you find the other swiss guy soon.
I hope so too!
Awesome 👍
Thanks 🤗
Success !!! great to see. I wish we had access on our side of the planet. I have the gear to do it but alas no satellite :(
True. We are very lucky here.
good night andreas do you have any knowledge about creating antennas? or about CST STUDIO SUITE or ADS and Empro, I wanted to use them to design antennas for wifi radios, thanks for all the knowledge you give us. : )
I do not have knowledge about antenna design. And so far the software packages are extremely expensive and probably not for the Maker market.
Hi Andrea, thank you for the great video. I dont see any preamplifier in your setup, did you directly connect TX pluto to SG LABS PA ? Tx pluto is about 3dbm,with 30db power gain you should get 33dbm of 2W max, is it correct ?
No. The yellow box close to the PA IS A 20dB amplifier
That's so cool!
I think it, too!
Excellent. We hams outside of the footprint are jealous.
I can understand. We were very lucky!
awesome
Thank you!
Could you elaborate more on how you managed to transmit o 10Ghz using the Pluto SDR. Was there some sort of gain filter circuit applied? Having a video illustrating this process would be excellent!
I do not transmit or receive on 10 GHz with the Pluto. Maybe you watch some of the other videos. It is not simple...
Connect a small temperature Switch @40°C Like ksd9700 to avoid overheating...
Good idea. Already ordered. I only had normally open parts left in my lab :-(
Thanks for sharing - very interesting videos
Didnt know that electronics could get hot enough to melt solder (was it lead-free solder?)
Hope your temp sensor finger was ok - touched hot soldering iron in the past - not fun. Worse was when i was young - made a big blob of molten solder and managed to get it on my arm - still got scar - ouch!
I do not know if it was led-free, but I assume yes. We all have our small wounds with lots of memories... They are a cornerstone of our experience.
🤔 interesting! 👍
Glad you think so!
Very nice! Had a feeling that first title might not last... ;-) 73 - Dino KLØS
I tried it... But UA-cam did not like it.
Magic Smoke is my name, burning circuits is my game!
Closer and closer to the Antarctica...
True. And I have a plan to get there. We will see if it works...
Well that was fascinating - you're making great progress with this project. I wonder why your first amplifier got so hot? Did you get to the bottom of the issue?
if you see in the video, Andreas explains. Some time i find things a bit subtle, explained fast because they are not useful. i worked at bmw and basically, it's ok to take the data from bad things, but no need to make bad things last longer. it cost time, processing and upload. i hope this explains.
Indeed. I do not exactly know why it got so hot, but I will not investigate much more. I learned the lesson and added a fan and will also add a thermal interrupter at around 70 degrees when I get one. I only had normally off versions in my lab...
@@AndreasSpiess I'm not an expert, but I have read that when the PA heat up, they start to increase their bias current more and more, causing it to heat up even more, so it start a thermal runaway
Very good video. Well done. I have been on the receiving end of some Winlink conversations via that sat, to bad we don’t have something similar for Australia. de VK2DU
You are right, we are very lucky here. A lot of circumstances had to be right to get such a gift, I assume. This is why it is worthwhile to show it to a wider audience, I think.
I don't understand 70% of this, but I wish you to have a good luck!
You are right. This is not easy to understand! Thank you.
As to ensuring proper cooling and RFI protection, what about a 9.5/10" or 19" rack enclosure with a beefier fan for the PA and ADALM PLUTO? Enclosure and fan grille (preferrably the kind which is a metal sheet with dense small holes) well grounded (you're a ham like me, you know the drill :D ). Should help with protecting the setup from Bluetooth, WiFi and other ISM gear.
Also, be aware of that using Switched Mode Power Supplies can cause headaches in RF applications (but nothing worse than that you can fix it with a good LPF).
1. Actually, I wanted to protect the Bluetooth set from my 10 watts at the same frequency ;-) I assume the dish is too small for the Poty, and part of hte power will not go towards space.
2. I have not decided on how I will mount it. My idea was that I want the installation as close to the dish as possible to reduce coax. But then it needs to be waterproof. I would prefer this concept also because it would be easy to take it with me for mobile. This is why I also wanted to try a 60cm dish.
A very interesting series. It is a long time since 1966 when I used a super-regen receiver to listen on VHF.
About the parabolic dishes- sometimes in Germany I have seen square flat satellite antennae for sale and on houses. I don't know how they work, perhaps they use some sort of delay feature to make the waves arrive in phase - or like a Fresnel lens maybe. Could you have used one of these in place of a parabolic reflector ?
With POTY and LNB he is RX and TX with a single reflector. NOT easily possible with the flat ones (which are a phased array) search for example for "Panelantenne"
@@reinholdu9909 Thank you very much - very helpful - I should have thought about the transmitting aspect though ...
And having only one antenna makes things considerably easier, I think.
I'm having a doubt sir is it possible to take remote control signal ( pwm from receiver ) and convert it into a variable voltage from 0 to 5volt . Can u please explain how to make it
I do not see a link to the content of this video.
@@AndreasSpiess so u reply only if it's related to ur videos. But u won't bother to clear ur subscriber doubt . Nice nice nice
hope you make a video about hacking fitness bands.
I do not own one :-(
0:19 * Dosn't show playlist in the top right corner *
Thank you! Now it should show up!
Once again another very informative video.
I've been checking every Thursday for your video on Q100.
But you lost me, on the very part I was most interested in. The stabilization. It seems you achieved it, without using the DPSO, which plugin did you use? Can you explain more please, and provide the link.
I'm not good at soldering so I'm hoping that this software solution, will be good enough to make frequency tracking in ssb in the GHz range, without replacing the Pluto's original crystal. Maybe wishful thinking...
I also thank you for your timing video, because it let me know I can use a cheap mublox as a stable clock. The limesdr has provisions for external clock inputs...
Thanks again for your great videos.
@Loid Loid ...go look for www.SDR-Radio.com, Simon G4ELI like he says "It's All About The Software", his software called SDR-CONSOLE 73
The software only works on the receiving side. You have to change the Pluto if you want it stable. As shown in one of my earlier videos I use a GPSDO for that purpose. Others change the TCXO. Both are not simple as you write.
The software is part of SDRconsole and only has to be activated. You find videos about it. It worked extremely well for me. My signals were exactly on the frequency. If you use the LimeSDR you do not need the soldering. Just a GPSDO because it has a reference input.
Thank you , for your quick and informative response ...
Not what I wished to hear, but I kinda knew there was no magic bullet. I will have to buy another Pluto to experiment with.
Must learn sdr console...
Thanks again gentlemen.
I now had qiute a few QSOs and go positive feedback about my signal. So the combination of GPSDO on transmit and beacon for receiving seems to be ok.
Now you can tell everyone you've reached orbit. 😁🌍
True! And not only LEO satellites. It is still unbelievable for me.
Forth, among the unwashed !
U da man 👍
:-)
So you forgot my advice (that you previously acknowledged) to wet the finger temperature sensor first. 🤔🙂
No. Because it was a very fast reaction without even thinking (shock) ;-)
I said that LNB needed attaching weeks back ya sausage lol indeed like the old ways lol your working anyway happy airways 73's
Yes indeed
The SG Lab V3 is a really good amp. I’ve made a couple of videos on it. We should organise a chat on QO100 sometime. Matt, M0DQW
I am one of your subscribers ;-) I would have loved to have an additional built-in preamp to make it Pluto power compatible. But maybe the transverters have more power?
For sure we can have a chat. Maybe you contact me via one of the channels in the description? The only other rig I currently have is a DMR with a hotspot...
Andreas Spiess That’s awesome! They dropped from 500mw with version 2, but I use CN0417 as a preamp and it has a filter too :) Will catch you soon on the air waves :)
Magic smoke leak.. ouch
True. Especially at the wallet ;-)
The PA is really a bummer. Did you check if the LDMOS is still ok?
If so it would definately be possible to repair the amp for pretty cheap.
Other than that, congrats on your first success, really fascinating stuff.
Greetings from Germany,
Michael
No, I did not check it. I assume other parts are also damaged. So I will use my time for other projects, I think. Like playing with the antennas (maybe I can make it portable...). I also saw LoRa projects over QO-100
@@AndreasSpiess Seems like really interesting projects, especially the LoRa part sounds amazing.
I would be happy to help you with the broken amp if you are interested, since LDMOS amps are kind of my thing. :)
Where are you located? Maybe you drop me a message on Messenger of Twitter?
@@AndreasSpiess I dropped you a message on twitter. :)
Can I receive the signal from Hong Kong?
I do not think so. Here is the footprint of QO-100: amsat-dl.org/en/international-qo-100-emergency-frequency/
.🖖Faszinierend! 👍
Genau dieses Gefühl habe ich auch bei diesem Projekt...
👍🏼
I did not know that bulgarians produce such power amplifiers. Where are they located?
How do you assume that the temperature reached over 300°C?
Cheers from near Yambol
1. AFAIK it is a Ham radio guy. And they are in Sofia. Quite famous for his amplifiers.
2. I just guessed from the flown solder. Maybe it was a little lower. I did not lookup the temp. I know my soldering iron is at 330 degrees and the solder flows ;-)
In Sofia is pretty much everything in Bulgaria... But it is further away from me now, as you were when i still lived in Germany :-/
But i can be in Burgas in one hour now :-)
Maybe you can make a test at which temperature you cannot melt the solder any more. Should be way under 300°C
Thanks for your Answer :-)
The amplifier has gone the way to the "Elektronikschrott"...
I looked up their address on their homepage.
You seem to live in a sunny place...
Oh, what happened?
I really live in a sunny place, calm as well :-)
The Chinese one. So I cannot do a test anymore
Strange, at the point of displaying the playlist, the stream displays consistently blurred
The data stream is coming from your local You Tube server. I've noticed that recently the default playback settings are lower than the uploaded version. Just pause the video and increase the playback setting to 1080p (if possible; I don't know where you are).
Strange. It should just be a reference to the videos in an order.
@@AndreasSpiess Thank you Andreas Spiess. I apologise I am unable to find a Swiss title such as Herr Spiess, Mr Spiess, Monsieur Spiess. I feel it is polite to address you formally in the first instance and more informally after that unless otherwise instructed by tradition or indeed any assumed and pre-existing status? Your comments are always welcomed. Alexandra (Crawford, Ms.)
@@michaels3003 Hi Michael S. I agree with your observation and by resetting the current session default resolution all aspects of the stream become clearly visible. Thank you for your input!
@@michaels3003 I am in the UK and again the behaviour of our telephone/broadband companies appears to be to squeeze as many subscribers as can be managed before complaints become threats of withdrawal from sufficient subscribers to drive a bandwidth upgrade. But never to subscribers, only to the carrier infrastructure until the same pattern re-surfaces. Pay double the subscription and perhaps then the quality of connection becomes paramount. You do get what you pay for. Considering that broadband was originally designed in the UK yet we have consistently lagged behind Europe in implementation and performance appears to be a historical hangover of bluff and double bluff. Political secrecy can be both insidious and damaging if it isn't anything else.
Smoke signals via satellite? 😎
Wer den Schaden hat braucht für den Spott nicht zu sorgen ;-)
Next...Bounce laser off the moon? :)
Radio amateurs sometimes us the moon as a reflector for normal radio waves. It works. But too much effort for me..
@@AndreasSpiess Amazing...didn't know that but looked it up after. Found this link hackaday.com/2019/10/01/bouncing-signals-off-the-moon/ about it.
RHF (ridiculously high frequencies) made me laugh and reminded me how what you guys all do is F****** Magic (FM) to me.
Glad you got it working but sad to hear about the demise of the power amplifier. Thermal runaway perhaps. Anyway they need good cooling as burned fingers will attest. The POTY offset would have caused some elevation angle offset that needed to be corrected. You may want to try a better lens also but the NB transponder is very strong so it will probably do as it is. You need a radome. I use this high tech solution with a transparent polyethylene covering. upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Ziplock.jpg/440px-Ziplock.jpg
SDR console is brilliant. Amazed at how quickly you set up the TX and RF offsets. It took me several attempts. Perhaps one day we can have a QSO.
1. You are right. Things have to be protected against weather. Currently this had second priority, but soon it will become #1. I love Ziplocks, but maybe I will use something 3D printed...
2. I do not have a high SNR for now (28 beacon - 6 no signal). I will investigate to increase it. For strong signals it is no issue, but for weak ones.
3. For the moment I have to sit on my roof until I get my Pluto on the net. One works, but the modified one does not connect to WLAN. Only then I can do QSOs from my lab.
4. This is why I showed the factors in the video. It was very clumsy without them...
5. I got the lens with my Poty from Passion. Where do I get a better lens? (BTW: I measured only around 1 db better SNR with lens compared without.)
5. Hear you soon!
@@AndreasSpiess I think Passion have a new lens from HB9VQQ. The dish focus alignment is very important. You may need to move things forward or back a little.HB9VQQ indicates the focus of his lens twitter.com/HB9VQQ/status/1264993815183740929/photo/2 is 9.5mm in front of the pipe. The original LNB front is about the focus.
WLAN? It really needs to be wired ethernet. If not at least use minimal bandwidth in SDR console. The Pluto is fussy and not named after the god of the underworld for nothing, You can expect 2.4 GHz WiFi to fall over when you transmit on 2.4 GHz like your bluetooth headphones but 5 GHz does work, at least it does for me.
Thanks for the tip about the focal point and HB9VQQ. I sent him a mail to ask where I can get such a lens. I have now also a 120cm dish which gives much better results than the 80cm one. And I have a 60 cm dish for comparison. I plan to do some tests. I was in the "Swiss Round" this evening and people said my signal was perfect. So at least a success...
And tomorrow I will check the focal point of my POTY!
Did you ever talk to Antartica ?
Yes!
This is mission impossible. You can't communicate with geostationary satellite in Antarctica, because geostationary satellites are below the horizon.
I did it. It was no problem :-)
@@AndreasSpiess No you did not. Probably via another satellite, but not via a geostationary satellite.
Or perhaps a geostationary satellite is sending a message to another satellite visible from Antarctica. Geostationary satellites are not visible from the polar regions.
en.wikipedia.org/wiki/Neumayer-Station_III
@@AndreasSpiess I did not write that you did not communicate with Antarctica via satellite. I have written and I repeat that it is not possible to communicate directly with a geostationary satellite from Antarctica, because geostationary satellites are at that latitude below the horizon. You can see it better in the attached picture. It is basic geometry. imgur.com/a/zuHlgFH , L is the largest latitude on earth from which a geostationary satellite can be seen, d is the distance from the center of the earth to the geostationary satellite, and R is the radius of the earth. d = 42165 km, and the mean radius of the earth is R = 6371 km. We can now write two equations sinA = R / d and L + 90 ° + A = 180 °. We now have a solution for L = 90 ° -A. L can be 90 ° only when A = 0. It can only be if the satellite is at infinity.
This sounds like there are just two Swiss guys left on this planet. Hopefully not. 😀
I love my viewers !!! So hopefully not.
Used Sennhiesers? Sure that must be a joke?
Normally we use them untill they break after a long life or we get a shiny new pair!
I got them "used" from a store. Maybe they were in a showroom or somebody returned them. At least they were cheaper than normal...
Der große 120er Spiegel ist nur zur Abholung. Das Lager ist von mir 25 km entfernt und liegt nächsten Mittwoch direkt auf meinem Weg nach Riehen. Nur so als Organisationsangebot.
Oh! Ich wollte die beiden Spiegel morgen holen. Das wäre natürlich super! Und dann würden wir uns erst noch kennenlernen. Aber: Hast du Platz zum einladen? Habe ich deine Mailadresse? Sonst kannst du mich auf Messenger order Twitter errecihen.
@@AndreasSpiess Shame on me. Muss leider absagen. Siehe Twitternachricht. Sorry
The latest Analog Dialogue has an article about using this satelite, see www.analog.com/media/en/analog-dialogue/volume-54/number-1/volume54-number1.pdf page 10.
Honest question...
why do you have a Swiss accent?
Honest answer: I do not know.
Nice video, however too bad of the amp !
As I wrote in the thumbnail (which caused some issues with UA-cam ;-)
Excelente video, no funciona subtitulado Español
The QO-100 videos have no Spanish subtitles. Only the Sunday videos. :-(
can't find you on qrz :( 73 IU5OFY
I am there. 73 de HB9BLA
@@AndreasSpiess hope to hear you again on air ,73
I am on FT8, as everybody else...
Fifth probably
Frying hardware? Normally that is my speciality but as long as you can replace it, it is ok...
Frying cheap hardware is ok. This one was a little bit expensive ;-) But now it works.
Nice Vid - vy 73 de DL8CY
Thank you!
I just smoked my pc, sent 120vac down the 5v usb bus, forgot about isolation! Stupid! :(
True. Shit happens :-(
@@AndreasSpiess Good opportunity for an upgrade, the Athlon 64 is shorted and who knows what else... Power supply seems fine.
I guess I smart country guy. I grew up ok. I always did well with technical stuff. I not have faith in the lieing control gov we sheep system. I no drama bad as long as I not get off my true technical life... My brains is the beginning to the universe same . Wish all good others well the same.... Time will tell... It never did fail me so far.. 50 yrs plus so far..i be 65 now 2020....Be true in your life always thinking.. Study dtmf.. sometimes it takes 2 frez to do the Job...Bye.. really he Swift guy is above me..but for sure we in..sane group. A thinker out side of the Box... 2 yrs ago I planted every year plants on my mom gave.. they forever if I go yesterday.. I done all . But I still have my brains. I still good still... I still do Arduino
Damn, second comment
FIRST!
But not really xD
is he saying Pretty UA-camrs???
I say: Grüetzi UA-camrs. It is Swiss German and means "Hello"
Blame the Chinese for the grilled amp😉 Would it be possible to contact Antarctica by short or longwave ham radio? Might be a bit easier 💩
I do not know if they habe antennas there...
you have served your country and served everyone else in the world. lol, you can be lazy if you want.
Thank you! Will do ;-)