Made a quick contact using my $24 BaoFeng UV5R with a handheld homebrew 5 element co-phased directional yagi.

@williamescolantejr5871

3 жыл бұрын

that can be alot of fun but a handsfull

@AGENT47ist

3 жыл бұрын

Hey friend i am using a Baofeng UV-5RA and i also have an ABREE Antenna 48cm can you help me a bit?

@coroamanicolai4527

3 жыл бұрын

Is it possible to make a contact with UV-5R and a Nagoya 771? I would buy an Yagi antenna but the Baofeng will most certainly overload on it.

Made numerous contacts on it last weekend, but now I am RX only so that others can also have a go. It works well. Just used a colinear vertical at home to get into it.

Hi, worked a couple of stations today from my mobile rig (IC-208) by switching from a memory channel with the Uplink Freq, to the VFO on Rx so I could adjust for doppler. The repeater was very busy with many stations trying to use it. Antenna was dual band diamond vertical on car. THanks for the video. Tim VK5AV.

I made a few contacts through the ISS. I'm using a Kenwood D74 with an Arrow II with a 2m filter to prevent desense.

@rodneyjohnson4794

3 жыл бұрын

whoa, i'm mostly asleep and read 'desense' as 'disease'. bedtime.

ISS FM repeater works fine for me. Tested with my Baofeng DM-1702B I got a signal from the balcony

Recently did it with a modified yaesu ft221r fitted with a ctccs board and transverter to 70cm, great fun😀

Thank you for the video!

A directional antenna makes all the difference. I have had several exchanges with a Baofeng and a 3-element 2M beam. It’s even better with a mobile rig.

Great video 👍 I’m sure it’s going to be very busy over the next few weeks when trying to access it 👌

Fantastic. Must try my uv5r

I have made one contact so far in about 10 attempts. I used a yaesu vx-7r on 5 watts. Antenna is the Arrow II 146/437-10wBP. Don't forget to store your ctcss on the uplink frequency for each memory channel you store.

I am not an amateur radio operator but love this type of monitoring. I will be listening in.

@TechMindsOfficial

3 жыл бұрын

Good to have you onboard 👌

@waynethebarber1095

3 жыл бұрын

It's not hard to do get your license and join the fun 73. N9rxb

Almost had my first contact at 815 pm. Couldn't quite get his call. Switching to the Arrow Beam tomorrow night and the 1/4 wave to receive. Hooked now lol. Thanks for the video KC3PWO

@TechMindsOfficial

3 жыл бұрын

Good luck with the contact. I need to get an arrow antenna myself, or I might make a home brew

@frankbush1239

3 жыл бұрын

@@TechMindsOfficial Thanks trying again tonight at 814 EST. I have a 3 element Arrow for transmit but I was thinking the same thing. Maybe a home brew 70 cm beam or just Buying the 2/70 Arrow. Good luck to you as well buddy. 73

I made three contacts tonight, no doppler shift, on a Baofeng uv5r on 4 watts, Homebrew ground plane . Used European Space Agency website map to determine flyby. Super fun. Just start hollering your call as soon as the map says it's over your continent. Someone has ears.

@jaseun1

10 ай бұрын

There is always doppler shift. Baeofeng can't get around physics :)

I made contact today using my Tram 1481 base antenna. I used an Alinco Dr-135 for the uplink and my FT-991 for the downlink, Seemed like only about 20 seconds we could hear each other. This was a pass over Hawaii. I made contact with WH7BR. Aloha, WH6FQI

Hello friend, I worked the ISS just a few days ago. I used the Arrow antenna Yagi and a Yaesu FT2D handheld and I also worked the station using a Motorola APX 8000 handheld with the same Arrow Yagi. Works beautifully! I did not compensate for any Doppler. So much fun! WS4TX

I will be attempting the unlink on the next pass using my id-4100 and a home built J-Beam yagi antenna

Using icom 7100 and cushcraft a17b2 yagi antenna and I have made many contacts on the iss repeater

Managed to make a contact yesterday when it flew over Perth. My callsign is VK6PCB and i made contact with VK6CS. i was also was heard by an amateur in Geraldton which is pretty cool. That's about 400km North of Perth. I was using my IC7100 and a Discone antenna. Only the mid frequency so i think i only heard anybody when it was directly overhead. It passed within 20km of my QTH. One day I'll build a proper Yagi with automatic tracking.

Made contact with YS1JFE using 17 foot base duel band and 50 watts on anytone 578 73, K4KWF

2m/440 wouxn and elk ant beam .

Hello sir, what's the 1600Hz setting for? Thanks, very helpful video!

The doppler effect will effect the tranmit frequency also. That may be why you can't get it to work.

@TechMindsOfficial

3 жыл бұрын

The uplink is on VHF which has a less than 3KHz +/- Doppler shift, so in this case it’s not needed specifically.

@donaldsmith3048

3 жыл бұрын

@@TechMindsOfficial I am new to this. But I have tuned up a lot of radios when everyone used 5 KHz. The tone is set around 1.5- 2 KHz. But it could just be that there are a lot of people all around trying to talk to it all at once and that makes it where it can't get the tone of anyone.

I used a D710 with M2 LEO pack antennas to make some iss contacts, but I believe there is an issue with the ariss 2m antenna or feedline, as the repeater exhibits the same problems as the old digester (unreliable uplink).

@itswift

3 жыл бұрын

"digipeater", not "digester"

I was concerned about the doppler shift. I'll give it a try with your frequency list.

@statesideqsod

7 ай бұрын

I assume that I would create another 7 channels to work the ISS astronauts direct on the 145.800/144.490 split pair as well?

Hello.on7nd name Nico. I have been receiving ISS cross repeater with rtlsdr with no lna in-between... I have calculated inches to mm and so I have constructed the arll paralindy With following values... Dipole 25 mm diameter. Total length 3168 mm. Gap on center is 6 mm. In the 25 mm pipe fits exactly 22 mm pvc pipe to insulate upper and lower part dipole.. Now the whole thing needs some pve insulators....nr1 has a 117mm diameter and must be shallow to fit exactly over the alu on the Feedpoint 25 mm pipe (dipole vertical) On the outside this pvc 117 mm are 4 small 32 mm long (4pieces) to make the total circle from about 180 mm. On these point are with a bolt M4 or M5 the 298 mm long director dipoles aluminium 10 mm diameter attached. They must be afterward tilted to 25 to 30 degree. Note when stand in front , all left edges directors are highest..... One leg vertical dipole is 158 mm... On the original arrl paralindy ther is no reflector on bottom antenna .I have added on a plastic round thing from 225 mm diameter which has a hole inside 25 mm on the antenna ...I mounted 8 aluminium strips on that insulator 20 mm X 2 mm thick long 161 mm each strip.....slightly longer than dipole (4 procent)m Coax is best with 75 rg6 u for reception rtlsdr( random length) a small 50 ohm cable was also connected with sma to connect to rtlsdr ... Result is fantastic.. V qfh and cloverleaf are tested ..not happy and low reception cubesats telemetry and saudisat 1 c.. Yesterday noiseless BBC quality with this paralindy. Vna result is ....resonant point really good visible in spectrum hsdr and low interference local stations...really made for circulair mobile stations . . Email me for photograph....73 Nico 5 9 plus 40 dB ISS. Will use it forever....that means alot

Very nice audio quality on your You Tube video, what mic are you using?

@TechMindsOfficial

3 жыл бұрын

Thanks! It’s a Rode Procaster with a Mic Processor :)

@stevemumbling7720

3 жыл бұрын

@@TechMindsOfficial Thanks, which mic processor are you using?

I havent used this yet i gotta try it

@williamescolantejr5871

3 жыл бұрын

if you never expierianced the doppler shift before i suggest just try an keep up listening only first time an note the time you start to hear contact to time of last heard contact that way you get a feel for your rig an antenna system an how it performs,have fun

@randomnessx3597

3 жыл бұрын

@@williamescolantejr5871 ive worked sats before just not this one

@williamescolantejr5871

3 жыл бұрын

@@randomnessx3597 ok np i did too when was an active ham more so in 90s an early 2000s have fun

Que vuelva la MIR la space station a Latinoamerica no le contesta, buen vuelo!

@briantorres224

3 жыл бұрын

La ISS solo se conecta con España y Usa ,en Latinoamérica estamos pintados. Nos discriminan. Sabes las veces que he llamado y nunca nada hace más de 10 años. Hubieron casos específicos a Colegios pero porque fueron planeadas con anticipación

What was the full callsign of the EI station you tried to contact? De Dave EI3IXB

Looking at the lower left hand corner it appears you were transmitting at 50 watts. Max should be 5 watts.

Happy to be corrected, but i don't think plus/minus 15khz doppler is possible from the ISS. Max speed coming straight at you I think is about 11khz. And because of the earth curvature the velocity vector at the start is directed slightly upward so the velocity towards you is less than that. On my baofengs in split mode they seem to allow smaller than 5khz increments. So its possible to set the transmit frequency minus 3khz on approach and plus 3khz when its going away from you. Although I don't think its required.

Is this the same in the US vs like the UK?

Your frequency chart shows the downlink frequency changing but not the uplink....I may be mistaken but wouldn't both be effected evenly? I dont see why uplink frequency would get compressed with its moving toward you and stretched when moving away. Please respond quickly with an answer im sitting in front of my computer with chirp trying to program my radio. Thanks for the video.

@TechMindsOfficial

3 жыл бұрын

The uplink is on VHF which has a less than 3KHz +/- Doppler shift, so in this case it’s not needed specifically.

@JulianGrammer

3 жыл бұрын

@@TechMindsOfficial What is more important is that only the station receiving should compensate for doppler shift. So the ISS operator compensates for uplink shift on receive and the terrestrial operator corrects the downlink reception. If both tried to match each other, it would be chaos and neither would connect. Also the transmitted signal should never be varied in mode or frequency during transmission. Good video. Thanks. G1EKW

I was able to bounce signal off both tx and rx but not talk to Astronauts

This is just like any other amateur satellite FM repeater. You can talk with other amateurs on the ground but not with the ISS crew.

1:35 you say "144.990 megahertz", thanks, see you on the repeater, de YL3GU

@iainmeteorscan1555

3 жыл бұрын

@Mārcis Bērziņš: Yep - you caught that slip-up, Mārcis! Easily done. I didn’t catch it first time around, but did when you pointed it out. Tech Minds: All is forgiven!

I have build a tape measure yagi with 1.2 swr on 144.800MHz and connect it to a Baofeng UV-5R. Tried my luck multiple times but I was never successful.

Anyone out there please? So - Doppler is allowed for on UHF receive (using 5kHz steps); would we not also require 5kHz steps on the VHF transmit to allow for Doppler? I’m sure we’d all appreciate an answer from someone who knows!

@jamesmcintyre9985

3 жыл бұрын

I don't understand that either. Doppler affects both uplink and downlink, but is proportional to the RF freq, so only 1/3 as much on the uplink.

@ThyAnarchist87

3 жыл бұрын

I'm interested as well. Just posted a similar comment. Not sure why it wouldn't affect both.

@marcisberzins

3 жыл бұрын

Doppler shift is proportional with frequency. I haven't tried ISS yet, but with other FM repeater LEO satellites with handhelds you should care about Doppler only on 70 cms (about +-10 kHz to the center frequency) but on 2 meters in practice (+- 3 kHz) it works on a single channel. de YL3GU.

@TechMindsOfficial

3 жыл бұрын

Exactly 👍

@iainmeteorscan1555

3 жыл бұрын

@@TechMindsOfficial /James McIntyre/Robert McCain/Mārcis Bērziņš: OK. Thanks, guys. I get it, that the technical answer is: Yes - there IS a Doppler shift (in both directions) of up to/around +-3kHz on 145MHz (2m), but the Doppler can be handled OK both ends by the radios. I find that rather strange, as I can hear when 2m radios are not on frequency (distortion and raggedness, if I can describe it as that) and therefore thought it would be beneficial to program one’s land-based radio +- 1 or 2kHz to give clearer TX and RX. Cheers, Iain.

I attempted the space station 3 times. I heard it last week at night but people were talking over one another. Friday and today I could actually see it but I could hear no one using it. I called out over and over but no one answered. Either it is shut off, or no one is using it at night.

New sub here can you record a transmmiting iss space station sound effect

@TechMindsOfficial

3 жыл бұрын

Welcome 🙏 Not sure what you’re asking me to record though. Please elaborate:)

So if i want to just listen to then i just have to listen to the uplink right ?!

@iainmeteorscan1555

3 жыл бұрын

@Bonedry _Barista: Hi. To listen to the ISS, you need to listen on the DOWNLINK - 437.800 MHz.

So the Astronauts DO NOT talk on this radio? It is only for bouncing signals?

@TechMindsOfficial

3 жыл бұрын

Dean Cory not on this particular radio no, but they do have a system which they normally talk to school students on.

Is it possible to listen 👂 this transmission using sdr?

@joszandstra2044

3 жыл бұрын

I think it should be no problem, will depend on your antenna what you get

@Willam_J

3 жыл бұрын

Yes! A directional antenna, like a ‘Yagi’ or ‘Log Periodic’, will work best, but a simple vertical antenna will also work, just not as well. If you’re using a vertical antenna, remember that it should be held at an angle, tracking the ISS. You want the side of the antenna pointed in the direction of the ISS. If you have an iPhone or iPad, there’s a great satellite tracking app called ‘pxSAT’. There are others, but I like pxSAT the best. If you have an Android device, there are tracking apps for that, as well. When the astronauts aboard the ISS have some relaxation time, they often talk with other Amateur Radio operators, on a separate radio. The downlink to listen for is 145.800MHz. Don’t forget to allow for Doppler shift. (As the ISS is coming towards you, the frequency will be slightly higher. As it’s going away from you, it will be slightly lower. Use your ‘waterfall’ display to track the frequency.) Also, there are many other Amateur Radio satellites that you can listen to, as well. Some of the easiest ones to hear are: SO-50 on 436.795MHz, AO-91 on 145.960MHz and AO-92 on 145.880MHz. Again, you’ll need to track them, to know when they’re overhead. I hope that helps! If you have any other questions, I’d be happy to answer them. Take care! 😃

@NoilsonCaio

3 жыл бұрын

@@Willam_J Thanks for sharing it with us.

@jplacido9999

3 жыл бұрын

@@Willam_J You are very kind to give all this information. Ham spirit, no doubt !👍

You note (at 00:51 sec) that a 67 Hhz CTCSS tone is required with your uplink signal. Will "TONE" work or must it be "CTCSS"?

@kd5you1

3 жыл бұрын

Those are the same thing.

@jeffslusher

3 жыл бұрын

@@kd5you1 TNX for response. I read somewhere that TONE only sent the embedded tone on transmit while CTCSS not only sent the embedded tone on transmit but also required an identical tone (from the repeater) to activate the the user's receiver. I've noticed that I can hear ISS repeater traffic with my receiver set for TONE, making me think that maybe CTCSS is the wrong terminology in this case?

@kd5you1

3 жыл бұрын

@@jeffslusher Well you're partly correct. CTCSS or Continuous Tone Coded Squelch is the technical term for Tone, but on receive some radios might have a TSQL indicator to show that the tone or CTCSS is being used on receive as well as transmit. Other wise they would have the Tone indicator if the tone is being used only on transmit.

@geoffpriestley7001

3 жыл бұрын

By tone do uou mean the old 1750 tone burst

@jeffslusher

3 жыл бұрын

@@geoffpriestley7001 No. I'm trying to understand the difference between "TONE" and "CTCSS"

Hello i have a successfull contact via iss crossband repeater here my first contact was E21EJC @1452utc sept.4 2020,, using a ft2dr and omni x30 antenna...... de dv1xwk 73

see "pge wiring error" seems a bit noisy

Here is a reference that may assist if you are using the CHIRP software to program your radio. It contains a generic CHIRP image which includes Doppler shift. www.miklor.com/COM/UV_ARISS.php

Do you have any information on how to set up a 991A for this use? I have one myself and would like to know how to use the cross band on it. Thanks and 73, KA4SEY

Try to receive starlink data😂😂 using the hack rf. So,that u could get free data roaming 😂

Using a quad array of circular polarized antennas and 2000 watts, I will try to bounce a signal off the moon and back into the ISS! Blahahahaha just kidding!

Thanks Tech Minds !!! EA1JBV - IN53VM : I make ISS, and very Interesant, the repeater ISS. I have Yagui Bibanda, construction home. Jejejeje. !!! I ready for copy this repeater ISS !!!. Good good this video !!!!! Thanks for video !!! EA1JBV. 73. And ready for contact with you !!!...

Wrong pass selection and inefficient antenna. I chosea high pass and used an IC271 for uplink and an IC 431 for downlink with yogis for both frequencies. Used a home brew ez el with stepper motors and home brew software. Easy access eventide as you gain access at early AOS. Too many stations competing to use substandard gear. Suggest quadriffilar antenna if you can't do yagi.

Couldn't NASA afford a decent radio like a Yaesu or Icom? ;) .-.-.

@iceman382

3 жыл бұрын

Childish comment. Kenwood, Yaesu and Icom are all decent radios. Each having their own pro's and con's.

@je1966

3 жыл бұрын

Kenwood has transparent digital communications hardware in their radios. neither Icom nor yarsu have it. Kenwood has radios less showy but much more reliable than Icom or Yaesu

@davidbird4854

3 жыл бұрын

@@iceman382 ,they are better than a over the counter that any body can buy with out a license,kenwood ,yaesu ,icom ,are the best ,i all are legal y the fcc,????? baofeng isnt ,fcc approed here in the usa,.

@iainmeteorscan1555

3 жыл бұрын

@@davidbird4854 Hi David. Well - that’s ALMOST English! Some words were decipherable but not necessarily in the right order! Stay off the Budweiser when posting!

Tell the flat earth space deniers