Adventures in DXing – Feb 2022 – Karl Zuk N2KZ

Signals From Space

Merry Christmas from above! What an interesting present we received. A vision came from on high. Slow Scan TeleVision (SSTV) pictures were sent continually from the International Space Station from December 26 to December 31, 2021 using PD120 format transmitted via 2 meter FM on 145.800 MHz.

The International Space Station (ISS) pictured against Earth’s horizon. [NASA]

The International Space Station (ISS) pictured against Earth’s horizon. [NASA]

If you were in range of their signals it was hard not to receive them! When was the last time you received 2 meter FM from over 250 miles away traveling at
17,000 miles per hour? It was quite an adventure!

Comet dual band vertical at WA2MCR

Comet dual band vertical at WA2MCR

Several PCARA members downlinked wonderful pictures using the latest MMSSTV software version known as YONIQ. (Free downloads with detailed instructions are available here — Microsoft Windows only). Eagerly awaiting new images from space were Joe WA2MCR, Mike N2EAB, Malcolm NM9J, Rob AC2CT and myself. We learned so much about ISS reception techniques together. The collaboration was brilliant.

Joe was the master of clean images using an Icom IC-7000 with a Comet 2m/70cm antenna raised to roof level. Joe’s results were top notch resolving several near-perfect frames. Joe proved an important lesson: Maximize ISS reception by using an omni-directional antenna free and clear from obstructions, high in the air!

Unless you have a sophisticated tracking system to follow the ISS as it passes, omni-directional antennas will provide the best results. They tend to be more resilient to deep fades and hold the ISS signal for much longer periods of time. My very first ISS attempt was with my 4 element 2m Yagi. The Yagi’s pickup nose was too narrow to hold and sustain receiving the ISS signal. A simple vertical omni antenna is a much better choice.

Mike N2EAB used a homebrew 2m ¼-wave ground plane indoor antenna connected to a Heathkit VF-7401 2m transceiver feeding audio to a HP desktop PC sound card via an audio patch cable. As you’ll see, his ideas really helped our mission.

Malcolm used a Yaesu FT-991A multimode transceiver connected to a Diamond X-200 dual band vertical collinear mounted on his chimney. “The FT-991A has a continuous spectrum display — which allowed me to retune slightly off 145.800 to compensate for ISS Doppler shift.”

Abbree 42.5'' foldable tactical antenna

Abbree 42.5″ foldable tactical antenna

Rob concocted a novel approach: “I was using a Yaesu FT-3DR (compact digital HT) with an Abbree 42.5-inch antenna, at 5:40 this morning. Indoors by a window with a clear line of sight facing west. I recorded the incoming audio data to a miniSD card, converted the .wav to a .mmv file using Audacity, then used YONIQ to decode. My first SSTV!” It was worth the effort. Rob acquired some beautiful pictures.

My approach echoed my QRP CW reputation. My motto: “Use the very least to get the very most!” My receiver was a beloved Uniden Bearcat BC-350A scanner I bought on sale as a store demo unit for $13 about 25 years ago. I spared no expense for my Earth station’s antenna: A 38 inch tall Larsen mag-mount received as a gift during a visit to the WEPN 1050 transmitter site back when. I placed it out on my porch deck on top of a barbecue grill that became the antenna’s ground plane. I enjoyed consistent predictable reception over and over again all week long.

Ubiden BC-350A scanner tuned to 145.800 MHz FM. [N2KZ pics.]

Ubiden BC-350A scanner tuned to 145.800 MHz FM. [N2KZ pics.]

A Learning Experience

We learned many useful and revelatory lessons during the week. One great discovery made all the difference in our results. I had been relying on a NASA site called Spot the Station for alerts telling me when the ISS would be overhead. You can instantly view an up-to-date list of ISS passage times around the world and even sign up for message alerts to be sent to your smartphone. It never failed to inform flawlessly.

NASA’s name for the site should have given me a clue regarding Spot the Station’s purpose. The listings and alerts were meant for Space Station fans who want to see the ISS pass over their house. The opportunities multiply wildly when you are trying to receive radio signals from the ISS. We collectively found that you could snag pictures from multiple passes before and after the suggested Spot the Station time.

This idea matured into a newfound strategy: The Lazy Man’s Method of receiving ISS SSTV images! We brought this idea to complete fruition. One night, Mike simply left his Earth station equipment on and ready and waited for results. While he was sound asleep, he picked up a formidable frame or two during a pass at 3:15 A.M.

We all resolved to adopt his approach immediately. The number of pictures coming in became almost relentless. After up to six viable passes every day you could easily catch a dozen or more frames automatically. Leave your equipment on for the entire duration of the event. You won’t miss a thing! It reminded me of operating an FT-8 station. Sit back, relax and watch the DX find you.

Many More Tips

Why don’t you join us for the next ISS SSTV event (to be announced) coming in 2022? Start with downloading MMSSTV YONIQ software. Audio hook-up is easy. Connect the audio output of any receiver to your computer’s soundcard line-in audio input (look for the jack marked with the microphone icon.)

Two-way splitter for 3.5mm mini-jacks can be used on computer’s audio input

Two-way splitter for 3.5mm mini-jacks can be used on computer’s audio input

There is a catch to this. Most computer’s soundcard interfaces do not allow full simultaneous in-out capability. When you plug in the receiver audio into your computer… how do you hear it? I found a clever solution: Use a mini stereo plug two-way adaptor. It now becomes a splitter-combiner. Plug your receiver’s output into one of the adaptor’s female jacks and plug a pair of earpads into the other hole. Then plug the adaptor’s male end into your computer. Now the audio finds its way to your ears and your computer simultaneously. You are all set to monitor your audio!

When the ISS is about to pass by you will begin to hear the picture data warble out of the static. Please leave the YONIQ RX mode in Auto mode to receive pictures and also click the Auto history box below the incoming video screen. Now your good pictures will automatically store into the C:\Ham\MMSSTV\History folder on your computer. Up to 32 pictures (default) or 256 (max) will always be waiting for you there. No effort necessary!

Make sure ‘Auto history’ (arrowed) is checked and ‘RX Mode’ is set to Auto while on the YONIQ ‘RX’ tab.. [Colors inverted for clarity]

Make sure ‘Auto history’ (arrowed) is checked and ‘RX Mode’ is set to Auto while on the YONIQ ‘RX’ tab.. [Colors inverted for clarity].

YONIQ software is well-developed and clever. Only the frames with useful content will be stored in History. If you have too much noise and static in your picture the software will disregard it. It doesn’t get more automatic than that!

One last tweak: In YONIQ, go to the Option tab, then Setup MMSSTV, then Misc. In the lower right, make sure to press ‘English.’ It will make a lot more sense that way!

For more information about everything MMSSTV in a PDF format click here.

The YONIQ Story

YONIQ decoding software is quite a story in itself. The original program is called MMSSTV named after its creator Makoto Mori, JE3HHT from Osaka, Japan. Today’s revised version called YONIQ was developed by Eugenio Fernández EA1IMW and volunteer members of Grupo Radio Galena of Principality of Asturias, a region of northwest Spain. The result is a mature product that is a joy to use. As a free download, it is a blessing and a gift! Yes, they really did think of everything!

FT-991A rear panel has a male DB-9 connector (arrow 1) for serial CAT connection as well as a USB Type B connector for both CAT and USB audio

FT-991A rear panel has a male DB-9 connector (arrow 1) for serial CAT connection as well as a USB Type B connector for both CAT and USB audio.

YONIQ was originally composed in Spanish. Detailed instructions will aid you through installation and translate the entire program into English. Scroll down to the bottom of the page to have all your questions answered. You could spend a lot of time experimenting with all its intuitive features! Besides picture handling, there are hooks for logging, automatic SSTV protocol assessment, sophisticated signal displays and CAT (Computer Aided Transceiver) control. You can even record the raw audio data of incoming signals for future processing after initial arrival.

Malcolm, NM9J, explained the capabilities of CAT control: “My FT-991A can carry out CAT commands using its DB-9 (serial) connector on the rear panel or using a virtual COM port over the USB cable connection. The FT-991A has a built-in soundcard, so that same USB cable is also carrying digital RX audio from transceiver soundcard to computer for processing, and carrying digital transmit audio to the soundcard built into the transceiver on transmit.”

“You can change band, mode and bandwidth from the computer console — and see transceiver parameters such as frequency, LSB, USB etc. displayed on your computer screen. Transmit/receive switching is also available usingCAT computer commands. Some software can complete your computer log entry based on the frequency, start, stop time, call sign of station worked etc. YONIQ/MMSSTV can switch the TX on when a picture is about to be transmitted then switch the transmitter off when the image transmission is completed.”

Follow the Map

Want to know exactly where the International Space Station is right now, where it has been and where it will go in the next pass? Go to the European Space Agency’s indispensable ISS map. Switch to Imperial mode in the bottom right hand corner to convert to measurements you may better understand.

European Space Agency map shows current location of the International Space Station, with latitude, longitude, altitude and speed at bottom left.

European Space Agency map shows current location of the International Space Station, with latitude, longitude, altitude and speed at bottom left.

Each ISS orbit takes about 90 minutes. The green circle around the ISS icon on the map shows where the Space Station’s communications coverage area is reaching at any given moment. Very important: Expect the ISS SSTV carrier to go off the air between images! This is normal. Keep listening and don’t give up when you
hear the carrier drop. It will be back automatically in just a minute or two with another image.

Twelfth picture of series 19 transmitted from the International Space Station in December 2021

Twelfth picture of series 19 transmitted from the International Space Station in December 2021.


Our group quickly understood a grand challenge! This ARISS/TV event transmitted a loop of 12 pictures to be sent in order to Earth by the resident Russian cosmonaut team. Look carefully at the sample picture we received. You might wonder what серия (seriya) means in Russian. It translates to English as “series” — we were receiving frames from the series 19 collection of 12 frames.

I suddenly found myself in the same mindset as my childhood pursuit completing sets of baseball cards! I made a list of all the frames I had successfully pulled in. I received some images over and over again. Some images were really elusive! At one point, I put out a public plea: “Hey, guys! I need frames 3, 4, 6 and 11!” I eventually caught them all. Pokémon!

Rob, AC2CT, took collecting to the next step. He applied for a commemorative certificate for his accomplishment and was awarded with a custom memento bearing his name and call sign from the Russian cosmonaut team. Well done!

The ISS amateur radio antennae seem to be mounted in the rear of the spacecraft. As the ISS icon on the ESA map passes your location, the signal will peak for earthlings down below. The best pictures seem to appear when the ISS icon on the ESA map appears to be just barely leaving your location — and — just north of your location. Is this a hint to where the transmitting antenna is located on the ISS spacecraft?

Clever Flexible Antennas

Shannon Walker KD5DXB uses the Kenwood transceiver with Soichi Noguchi KD5TVP during a recent ARISS amateur radio session with Hisagi Junior High School, Zushi, Japan. [NASA]

Shannon Walker KD5DXB uses the Kenwood transceiver with Soichi Noguchi KD5TVP during a recent ARISS amateur radio session with Hisagi Junior High School, Zushi, Japan. [NASA]

Malcolm, NM9J, searched the Internet and found remarkable details about the amateur radio transmission equipment onboard the ISS. At the heart of their station are Kenwood VHF/UHF FM Dual Bander Data Communicator TM-D700A/E and TM-D710-GA transceivers perfectly designed for use aboard the ISS. Complete details of these sophisticated units here.

Furled antenna for use on ISS is made of flexible metal tape coated in Kapton® polyimide film [ESA]

Furled antenna for use on ISS is made of flexible metal tape coated in Kapton® polyimide film. [ESA]

A highly illustrated tour of the ISS antenna system can be found [here](http://www According to this site: “The orange/black antenna strips are very flexible and will not cut or poke the astronauts’ space suits. The metal portion of the antennas is similar to a metal tape measure and will bend back to its original shape. The metal portion was then covered with a protective plastic material to prevent sharp edges.” You will marvel at this design. It reminds me of the tape measure Yagis that are used during PCARA fox hunts!

The ISS Fan Club site provided further detail: “A set of four antenna systems are deployed in the ISS Service Module supporting the current installation of the Kenwood D700 and D710 radios. Each of the four antennas can support amateur radio operations on multiple frequencies and allow for simultaneous automatic and crew-tended operations. Having four antennas also ensures that ham radio operations can continue aboard the station should one or more of the antennas fail. Three of the four antennas are identical and each can support both transmit and receive operations on 2 meter, 70 cm, L band and S band. They also support reception for the station’s Russian Glisser TV system, which is used during spacewalks. The fourth antenna has a 2.5-meter (8 foot) long vertical whip that can be used to support High Frequency (HF) operations, particularly on 10 meters.”

“Two antennas are installed in the Columbus module, currently serving the Ericsson radios deployed there. Frequencies available for transmission to and from Columbus are 2 meters, 70 centimeters, L-band and S-band. These antennas will also support the Ham TV DATV transmitter.” Now that we have piqued your interest… watch this
simply amazing video

Strange DX Skip?

Some very brief bursts of specifically PD120 data have been seen when the ISS is far away from our area. On a couple of occasions, I captured PD120 data as the spacecraft was just beginning to fly over Japan. Maybe this is some sort of skip? Was it coincidence? Does the ISS signal bounce off the surface of the Earth and then propagate like a terrestrial VHF signal? Another mystery to be solved.

Inspirational Antenna Project

Turnstile antenna for circular polarization

Turnstile antenna for circular polarization

There is so much ISS mind candy to be found on the Internet! The ARRL website offers an easy-to-build crossed antenna array specifically for receiving signals from the ISS. “The turnstile is basically two, two element Yagi antennas that are pointed perpendicular to the ground (pointed up), the two antennas are mounted perpendicular to each other (in a cross configuration) and electrically phased to create a circularly polarized antenna pattern that mitigates signal fading due to polarization shifts that occur as the signals from space traverse through the ionosphere and reflect off of surfaces surrounding the immediate antenna environment.”

I know what my next project might be! Detailed plans can be found here.

A Final Eye-ball QSO

The week-long SSTV event transmissions ceased just after noontime on Friday, December 31st. We were sad to see it end.

While our memories were still fresh, The International Space Station returned to bid us a fond farewell! Just as dawn was beginning to break in the east on Tuesday, January 4, 2022, the ISS made a perfect pass, high in the sky, from 6:29 to 6:35 A.M. The spacecraft appeared like a bright cylinder to my eyes at 14 degrees above northwest and flew across the sky — reaching as high as 89° above (right overhead) — and then gracefully speeded away leaving at 10° above the southeast into the beauty of the red/orange new dawn. The Space Station caught the morning light, sparkling with glimmer — perfectly centered in the sky and gracefully streaked away until it was out of sight. What a fitting ‘goodbye!’

Dawn breaks as the ISS departs from Karl’s location

Dawn breaks as the ISS departs from Karl’s location

Daily SSTV Transmissions… on 20m HF!

Can’t wait for the next ISS SSTV event? You canfind Earthbound amateur radio operators sending SSTV pictures daily (especially during daylight hours) on 20 meter USB. Look for them on 14.230 and 14.233 MHz. Hookup your computer to the audio of your HF receiver, begin YONIQ on your computer and then sit back and wait for results! All sorts of call signs and entertaining graphics will be coming your way!

Sample SSTV image as received on 20 meters

Sample SSTV image as received on 20 meters

More to Learn and Discover

Still to be discovered: I understand positioning data from the ISS is transmitted on 145.825 MHz and this is sometimes used as a live test signal for amateurs to intercept while honing and tweaking their receiving stations. Comprehensive details about various ISS data transmissions can be found here and here. Software specifically written for resolving packet datafrom the ISS can be found here.

Get the very latest news regarding future ISS events via the ARISS blog. See the definitive collection of stunning image captures from above and please don’t miss the fascinating ISS Fan Club page.

So Major Tom… are you ready to be a Rocket Man? Keep your eyes to the skies! My congratulations to all who participated! What a grand collaborative experience! See you next month!

73 es dit dit de N2KZ “The Old Goat.”

UK MoD GPS Jamming

This interesting information reaches us via Tam MM0TLW, Southgate Amateur Radio News, and Ofcom.

A GPS jamming exercise is taking place in Dumfries & Galloway from January 10 until February 4 2022, and further similar exercises are planned for later in 2022. Southgate ARC does a great job of summarizing the details, please click here for their detailed post and here for the original Ofcom information.

Morse code on Channel 4 TV Sunday Dec 19

Via Tam MM0TLW, here’s a quick pointer to a potentially interesting TV show: Guy Martin’s Lancaster Bomber – on the surface it appears to be about an airplane, but apparently there’s content that evolves around Morse code.

Click this link for some details published by Southgate Amateur Radio News

(Btw – they also advertise a Morse code online course – maybe worth a look?)

Coming Up: Christmas Day Net Dec 25th 10:30am

Many of you may have received an invitation already, and we’ll remind you again later, but here it is: Saturday morning, the 25th of December 2021, Christmas Day, at 10:30am, we will all gather for the 2m radio net using the GB3DG repeater.

It will be a short meeting to pass on Season’s Greetings, so there are no excuses! If you can reach the repeater, please make sure to join and say hello!

Many thanks to Clive GM4FZH and William 2M0WML for idea and arrangements – it is my understanding that these two are responsible, please let me know in case I’m neglecting someone here!

The World This Weekend on Paul Godley and his achievements

Via Nadine MM0WNW

Listen again to The World this Weekend (from about 22 min 40 sec) for a good report on the first Transatlantic transmission received by Paul Godley 100 years ago – received at Ardrossan on the west coast of Scotland and the history of short wave radio.

Click this link for the BBC recording.

CW Resources

The following content has been collected by Nadine MM0WNW and I’m posting on her behalf.

During an excellent CW Discussion Evening at the start of December 2021, it became clear that there is a range of ways WARC members use Morse code (some inspirational stories were shared). It’s clear that there are a lot of different learning styles, so it’s useful to be aware of different approaches to learning the code and improving proficiency. Following the meeting, several individuals have made suggestions – so here’s a beginning list of recommended resources.

Suggestions from Tim G4YTD

He says: There are loads of online resources available including pile up simulators, QSB and QRN simulators, and of course live on air practice.

Some Recommended Resources:

Joining FISTS – CW Society
The club produces practice CDs containing MP3 code at various speeds, I bought these to give a little back to the club, not sure how much use they were as I could remember quite a lot of the text on subsequent “listens”.

ZL1AN – Teach – Windows program
Scroll down the page to find the download link
This can teach letters, numbers and punctuation, and when proficient use the load practice text function to have access to 990 5 min Morse-newspaper articles. Good fun and has helped me a lot. I set a task of two lessons per day for a year. At the end of each lesson the CW article is shown on screen to check against. Speed and spacing are variable by the user, allowing the student to go as fast or slow as you please.

This is a fun hardware project (Easy to build) that can send random characters, numbers and punctuation.
Depending on mode, the user then sends the character back on the box which if sent correctly will display it, if you get the timing wrong, it shows a series of “e” and “T” characters.
The club who designed it releases software updates occasionally. It can also be used as a practice oscillator and will display the characters sent to it. For classroom use a low power tx is built in to allow real QSOs between multiple users (in the same room). Don’t try to take it on an aircraft though, it looks quite suspect!

Suggestions from Frank GM3JKS

First Class CW Operators’ Club – has an excellent page – with links to the following online resources, plus other helpful information. Three of these resources are listed below, but there is much more information on the page

Morse Trainer by Ray, G4FON (FOC 1874)
This free Windows software uses the Koch method, teaching CW two letters at a time sent at the speed that you want to achieve, e.g. 15 wpm. When those two are mastered others are added. As you improve your skill you can add QRM, QSB and QRN. You can also adjust the character speed and the spacing between the characters.
Ray gave the presentation “Improving your Morse Code skills from 5NN TU to effortless casual rag-chewing” at the 2018 RSGB convention.

Learn CW On-Line by Fabian, DJ1YFK (FOC 1796)
This free course, using the Koch method, lives in “the cloud.” It includes teaching and practice at various speeds using text and code groups. There’s even QTC practice for the WAE contest.

Pileup Practice by Chuck, NO5W (FOC 1944)
Chuck has been providing the software used for the Kansas City DX Club’s pileup competition at the Dayton hamfest for about the past ten years. He’s put several years worth of his competition archives on his website. They’re great practice for digging calls out of the mob.

From Karl N2KZ (a Morse tutor with experience from the US perspective)

Clubs: FISTS (Karl agrees with Tim about the usefulness of this club)

Straight Key Century Club

Quarter Century Wireless Association – Free monthly CW newsletter


CWCOM – (TRY IT! TRY IT !! TRY IT!!) A wonderful way to learn Morse – Windows only (note from the editor: can run on Mac or Linux using Wine). Use an Australian server to send Morse (with your computer’s down-arrow key and more!) and see your code fist produce characters on-line. Talk to others in Morse from all over the world with just your computer! (Everything you do is accompanied by on-screen text to encourage you and to build your self-esteem!)
Free download:

The MFJ Morse Code Tutor – hold in your hand an endless source of code to listen to.


The Morse Bible (Third Edition – 241 pages)
William Pierpont’s leviathan and authoritative tomb regarding all things Morse (free download)

Highly recommended: RSGB book on learning Morse

Highly sought after: RSGB early edition Morse book authored by the legendary Margaret Mills

Plus Karl’s unbridled tribute to Margaret Mills (see newsletter, start at page 5)

A few additions from Oli MM0YOS

Regarding the CWCOM software Karl mentioned. I built an adapter based on the description on the website, to connect my real paddle to the computer and use it with the application – that worked very well and I recommend it for a more natural feel and better learning/practice effect.

I also recommend, mentioned above by Frank as Learn CW On-Line by Fabian, DJ1YFK – easy to access since it runs in the browser, and works very well.

Once more in addition to a suggestion by Karl, I found an MFJ-414 DELUXE CLASSROOM MORSE CODE TUTOR for sale on Facebook. I actually don’t recall how much it cost me, but these devices are very versatile and good fun to play with.

Finally, I mentioned the Facebook group “Slow CW UK” on the night of the Zoom discussion – with over 600 members you can easily find others for practice CW conversations.

CW Focus Evening 2nd December 2021

After our recent brainstorming evening it became clear that there is great interest in CW. Next Thursday our meeting will be all about CW, and Karl Zuk N2KZ – who is a real CW master – has agreed to chair the evening. In his own words:

Are you interested in Morse Code and CW? Join us this Thursday for a casual interactive talk all about the subject and great ways to learn all about understanding code. Karl Zuk N2KZ will join you for a conversation all about it.

We hope this will be interesting to many – bring your questions, your Morse keys, your CW related anecdotes and experiences – and of course you are more than welcome if you already know all about CW.

Finally, Karl provided us with a copy of his “Morse Code Survival Manual” – a great little book he put together himself. Please download your copy here!

Becoming a Radio Amateur – How we can help

We have received several queries recently about club efforts in the area of training – something the club has always offered, most recently through the efforts of Clive GM4FZH as our lead instructor. Clive recently resigned after many years, and Covid struck even before then – as a result, amateur radio training and exams have changed and so has the club’s involvement.

There is now a new page titled Becoming a Radio Amateur on this website, also accessible through the top-level menu, which details our situation at this point in time. We will keep this page up to date as things progress. Please feel free to pass on a link to the page wherever necessary!