Now that the ISS’s digipeater is active there are several opportunities per day to try out different ways of confirming a radio contact with it.
Yesterday I wanted to see if it’s possible to get a data packet heard by the station 250 miles up with just the “rubber duck” antenna that came equipped with my super low-end 8 watt Baofang BF-F8HP radio (affiliate link).
I attempted this contact when the station was almost directly over my location for the best results. I attached the radio to my computer with the BTECH-APRS-V01 (affiliate link) cable that converts the radio’s mic and headphone jacks into a three prong TRRS connector for smartphones and laptops with a single headphone/microphone jack on board.
After sending a ton of packets into the air while tracking the station with my smartphone it looks like one of them actually made it according to ARISS.net that listens for packets beamed back down from the station.
I was traveling when I did this so I didn’t have my Windows computer with me. I used an iOS app called PulseModem running on my Mac in its iOS compatibility mode. It was having trouble triggering the radio’s VOX so I probably sent less packets than I thought I did. I ended up holding down the PTT button on the radio and pushing transmit on the computer’s screen.
I’m looking forward to seeing how this works with a more reliable set up on future passes!
The astronauts turned on a data packet repeater on the space station last week. When the station is overhead licensed amateur radio operators can send short messages to the station and it re-transmits those messages back to the ground. I had a successful transmission on my first shot!
Somebody from Virginia heard me through the station and sent a message back:
To hit the repeater I used a handheld radio, an Arrow Satellite antenna, and a Signalink USB soundbox that I talked about in this video. I used a piece of software called PinPoint to manage the data packet traffic which connects up with another piece of software called Direwolf that listens for the packets and passes them to Pinpoint.
Here’s a fun video from RetroRecipes where they made contact using a Commodore 64! This worked because the packet data protocol used is the same one that was used in the 1980s to transmit data over the radio. Sometimes when something works it doesn’t need to change all that much.
This repeater isn’t always active. But the voice repeater on the station is usually going all the time. Sometimes you can even catch an astronaut operating the station during their break periods!
Some may consider amateur radio an obsolete technology given all of the ways we can connect to others over the Internet. Unlike the Internet nobody owns amateur radio and it’s relatively easy to reach people over super long distances with nothing more than a low cost radio and a wire in a tree. As I’m typing this I’m remotely logged into a PC in the basement making contacts in South America using a digital mode called FT8.
Working within the limitations of small bits of bandwidth and the physics of radio communications is a ton of fun for those of us who like tinkering with technology.
In this first video we look at W1AW, also known as the Hiram Percy Maxim Memorial Station. Maxim was the co-founder of the ARRL and an early pioneer of radio technology. You’ll see one of Maxim’s radios towards the end of the video. It still works but it’s rather dangerous to use around modern electronics due to the electrostatic fields it generates.
W1AW is where the ARRL transmits their morse code trainings and digital bulletins and is known throughout the world as an important entry to get into contact amateur logbooks.
W1AW is open to licensed amateurs and the public to operate from too which is what we’ll do in part of the series!
My latest video is a “haul” of some of the Ham radio gear I picked up to begin building out my base station. For equipment I went with the Yaesu FP-991a which a solid all-round radio that covers HF, VHF, and UHF frequencies in a single unit. It has separate antenna connections for the HF and UHF/VHF sides.
I went with an HF (high frequency) antenna that blogger Tom Costello built for some of the same things I’d like to do with mine – exploring the 10 meter band with a technician license. Technicians here in the USA get a small sliver of that band to experiment on but need a General and/or Extra license to go further into the lower frequency bands.
So far the set up is working quite well – I’ve made some very long range digital FT8 contacts into Europe and South America and even talked to somebody briefly in Georgia from my home in Connecticut!
There will be much more to come on this topic as I get antennas installed and begin exploring the portions of the radio spectrum this new equipment will give me access to!
I just ordered a bunch of stuff to begin my amateur radio station. I still only have a technician license which limits a lot of what I can do on lower frequencies but there’s still plenty to explore.
For the base unit I went with the Yaesu FT-991A. I like it because it integrates HF, VHF and UHF bands all in one unit and its powerful enough for the things I want to do. There’s room to grow here as it also works on the frequencies I’m not currently licensed to operate on. For power it can do 50 watts on UHF & VHF with another 50 on the HF bands. Because my HF interests are mostly in the “weak signal” domain that’s more than enough power. And the 50 watts on the UHF/VHF side should be more than fine to do some of the local packet stuff I’m interested in exploring.
Somebody told me that in photography you can’t have enough lenses and in amateur radio you can never have enough antennas! In my case I’m limited to the UHF/VHF bands and a small sliver of the 10 meter HF band. So that helps a bit to narrow things down.
For UHF/VHF I went with what DX Engineering suggested – a Diamond X50A. It’s a simple vertical fiberglass antenna. For HF I found a great blog post from Tom Costello who’s doing exactly what I want to do on HF with a technician license. He built a simple dipole using a pair of MFJ-1610T antennas to make 10 meter contacts. So I bought exactly what he is using.
Because I am not all that handy I will be hiring somebody to mount the antennas and run cable into the house. In the meantime I bought a portable antenna tripod that I’ll set up when I’m exploring the spectrum. I am eventually going to get the UHF/VHF antenna up on the roof but will keep the HF closer to the ground as I’ll be needing a different antenna after I get my General license for the lower bands.
My plan is to try and reach out to a few viewers using the weak signal FT8, JS8talk, and whatever other protocols might work over 10 meters. If you think you are in range let me know and I’ll add you to the list! I’d love to do a few livestreams experimenting with it.
Contacting the Space Station The International Space Station has a pair of amateur radios on board and it’s possible with just a handheld radio to communicate through it! Most of the time the astronauts aren’t available but the radio is set in repeater mode so people on the ground can communicate with each other over great distances. In the video I demonstrate how I was able to talk with some 300 miles away using the station as a repeater!
Digital Voice Communications The Anytone 878UVII Plus radio I purchased works in analog and digital modes. I was able to connect to a local repeater and communicate with the Connecticut ARES group digitally. I’ve found so far that experienced Hams have been very welcoming and helpful with this newbie :).
Packet Radio I am very interested in sending data through the air without having to use phone lines or Internet connections to do it. In the video I demonstrate how I was able to send an email through a local Winlink server using my handheld radio and a laptop.
What’s next? I need to get a proper antenna mounted on my roof for VHF & UHF communications along with a more powerful base station radio. That’s my next project although I’ll probably hire a professional to install it. I welcome any tips, recommendations and advice !
Still having fun with amateur radio! I’ve made some progress on a few fronts.
Last night I made my first successful contact with another HAM through the International Space Station’s repeater! The person I reached is in Ithaca, NY – about 300 miles from my home in Connecticut. He offered to send over an Mp3 of his side of the transmission which I’ll post here soon!
Typically my radio can reach about 20 miles give or take so having the space station relay transmissions is a huge range booster. What’s remarkable is that my radio only transmits at about 6 or 7 watts and the station is 250 miles up.
What I’m finding with this hobby is that you need the right antenna for the job. So I recently picked up the handheld monstrosity pictured above which is designed for making space station contacts. It’s also useful for regular local contacts until I get a proper antenna installed here.
Additionally I was also able to send my first message through the Winlink email system without using any Internet infrastructure! This is a hybrid email network that can work via local radio receivers but can also route email either from station to station or over the Internet. It was fun to watch the transaction on my laptop. I bought a special device called a “SignaLink USB” which can switch on my handheld radio’s transmitter when the PC sends out the audio.
Once I get an antenna installed I’m going to set up a little BBS on a Raspberry Pi for the local HAMs to use.
I’ll put together an update video soon once I have a few things ironed out!
I was assigned my callsign from the FCC last night so now I’m officially an amateur radio operator! I already made my first contact with somebody off a local repeater station. He’s located about 20 miles away from me. The cool thing is that he’s been into contacting the ISS and other orbiting satellites which is something I’m interested in too.
I’m sure we’ll have more to come on the radio topic!
So I took my technician test and passed it with only two incorrect answers out of 35. Now I’m waiting for the FCC to process my application and assign me a call sign. I won’t be able to start transmitting on my radio until I show up in the FCC’s database a little later this week or next.
You can’t encrypt any communications – even when when using digital modes. There is one carve out for sending commands to orbiting amateur radio satellites but that’s it as far as encryption goes.
Anonymous transmissions are prohibited. Amateur operators need to identify themselves with their call signs. And the database of call signs and licenses is public information available to all. I did discover a few good friends of mine locally are licensed operators! I had no idea they were until now.
No swearing or obscene language. This one speaks for itself.
No broadcasting. Amateur radio is typically a 1 to 1 communication between two operators. While you can make more general calls for testing your radio you are prohibited from reporting the news or having a nightly radio show. There are exceptions for emergencies where providing a general broadcast can help save lives and property but that’s the only exception.
Stay in your lane: The FCC has assigned specific radio bands to amateurs where they are allowed to operate. As a holder of a technician license I am limited mostly to local communications. Operating on the longer range high frequency (or HF) bands requires upgrading to the general license. I am allowed to operate in a narrow stretch of bandwidth in the 10 meter space, however.
There will of course be more to come on this topic! Stay tuned!