Ham Radio - SSTV Slow Scan Television, an overview.

Just a little look at the mode and some of it's history.
SSTV frequencies:
www.amateur-radio-wiki.net/in...
MMSSTV for windows:
hamsoft.ca/pages/mmsstv.php
QSSTV for linux is in the repositories. Install it with synaptic package manager.
SSTV for Mac:
www.qsl.net/kd6cji/
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[@avt3216]

"Tele" means "distant" in Greek.

[@keithjas25]

I did wonder about that. I was thinking about telescopes, teletype, teleprinters in the UK etc

[@NHSbandUnofficial]

Kind of brings back memories of sending pics in the dial-up bulletin board days. Thanks for sharing!

[@zzarkS]

Tuned in to the ISS downlink and waiting for that perfect pass over! Great video Kevin!

[@jamescstanley5018]

Very interesting Kevin. I wish i had a copy of this when trying to explain how and what the 405/625 lines meant on domestic TV. When you think just how far the human race has advanced in the last 100 years or so, from the Wright brothers to the moon, spark transmitters to moving picture TV, and Turin's Bombe to a wrist watch with more computing power. I wonder what the next hundred years, or even 20 will bring!! Keep up the great work Jim M7BXT

[@HamRadioLiveShow]

Kevin, thank you for posting this. I host a daily KZbin channel that helps to teach ham radio. I like to show different modes that we use in the hobby. This is very well done. I’d like to use this on an upcoming episode. Thank you so much for the presentation… Keep up the terrific work here! The more we can advance knowledge, exposure and interest the better. All the best, Larry de K7HN

[@daviddavidson1372]

Love the mmsstv software. it works great. Just set for auto detect on 14.230 ... Great video.

[@KevinFraser411]

Thanks for the video. The colours mentioned - Cyan, Magenta, Yellow and Black, are ink colours for printing (usually) to paper. CMYK colours are "subtractive. " This means the colours get darker as you blend them together. The RGB colour model is an "additive" model, when 100% of each colour is mixed together, it creates white light. RGB is used in displaying images and video on a monitor or TV. Love your videos, thanks again, 73 de Kevin ZS6KB.

[@VoorTrekker88]

2:25 the "tele-" prefix, such as in television, telephone, or teletype, does not mean "audio" it means something that travels across some distance.

[@R2DMD]

Excellent explanation. Thanks!

[@BradSnyder1]

This seems pretty neat! Thanks for the overview about it. 73

[@samglaim4274]

We take for granted HD video formats these days so it's Interesting to hear/see modes like SSTV. Cheers, 73

[@kd5aj]

Dear Kevin, tele means far. Television means 'far vision' Kelly K5AID

[@ve3zcv344]

Turned on this video and my roommate was like what in the world!!

[@loughkb]

Ha!

[@brianshanahan3878]

Very cool intro! I also just used the phone app "robot36" to receive your image by holding my cell phone to my speaker. It worked pretty well.

[@johnkershaw9575]

Hi Kevin, loved this video. I learned a lot. JJK

[@charlesschindler1971]

Top of the day to you Kevin.

[@jeffreyeide7512]

Yo Kevin: Great video. You failed to mention a few cell phone apps that do sstv. A few cost money, but a few others are free. Haven't gotten my hf station going again but likely to try sstv when I do. Great video again! de seeker / Jeff WA7LFP

[@ftlaud911]

Nice video. I was bored and tried it out today on MMSSTV. Connected in/out sound card and within a few minutes it started working. Seems like an orignal picture text measage. Having flashbacks of the modem days and fax machine.

[@radioboyable]

Thanks kevin

[@robinmcknight3731]

Tele scope means inspecting from a distance

[@WHNorthcote]

Do you think you would be able to make a video of setting up DRM/easypal and how to make a Pi and Win10 setup for receive and transmit. I tried Easypal but could not get my head round the IP address setup thing so gave up. Maybe turn into a series of videos on a How to setup.

[@AntonioBarba_TheKaneB]

"Tele" means "distance", Tele-vision = to be able to see distant things

[@simonj48]

I use the app ISS Detector on the google play store to find when the ISS passes over head, anything +40 degrees should give enough window time to complete an image. Very handy as it you can give you an alarm for when they pass over head. As for SSTV software, there are plenty to use, but if you're off up a hill with a cheap baofeng trying your best, you may also want to try one of the SSTV apps. Robot36, again on the Google Play store is pretty good, it has auto mode and will save the image once completed. Unfortunately wind can cause the sound to be off a little and result in excess noise on the image, so try your best to shield the wind if you're doing it this way. Also, its worth noting that you'll ideally want to turn squelch off completely. Good luck for those trying to receive images from the ISS. For those unlucky enough not to be able to make it out or be near a radio on the short spans that the ISS is over head, you might be able to use one of the Web SDR, like the London Farnham site, farnham-sdr.com/ and manually check when the ISS is overhead at that location.

[@tifogra689]

About the software there is a package called "wine" available for Linux and Mac and with this you can install Windows software on Linux and Mac. So you can install MMSSTV on Linux and Mac as well. BTW You're doing a great job with your videos! I love watching them! Wine: www.winehq.org/ PS: I use MMSSTV with wine on Linux Mint 19 (based on Ubuntu 18.04) and it works great.

[@MoTown44240]

I tried this years ago with a Commodore C-64C. Might be time to try again with more powerful computers e.g. Raspberry Pi or one of my 64-bit laptops.

[@epicObamaenjoyer]

I personally use a ham radio and my phone to display the sstv images, the quality isn't the best but it's by far the most convenient.

[@epicObamaenjoyer]

Sorry if English is bad it's not my first language

[@mohammedelmallakh4955]

Keven can you give a method to make sound loudy?😢😢

[@pixeluser8243]

The 'Tele' explanation should really be corrected or removed to prevent others from thinking tele means audio.

[@sincerelyyours7538]

Interesting stuff! I wonder, can you DX using SSTV or is this strictly an NVIS kind of thing? Also, why can't noise be auto-corrected like fax data sent by modem over telephone wires using parity checks and so on? It might require two channels, one for tx one for rx, but even so, is this possible or am I missing something?

[@loughkb]

It's not a digital signal, so no error correction is possible. It's an analog tone. I remember many years ago that there was a SSTV event or two. You can certainly DX. I've picked up SSTV images from other countries quite often. This weekend the Space Station was transmitting SSTV on 2 meters all weekend. I think that probably counts as DX! ;-)

[@keithjas25]

Is there any protocol considered standard or do you have to agree or hope? ps Glad to see you back Kevin

[@loughkb]

Scottie 1 seems to pop up most often. Usually one of the scottie modes or martin modes. The software will automatically determine the sending mode most of the time.

[@user-xf7mu7ub9d]

I really like the sound of SSTV. It looks like it came from an another planet or from an UFO.

[@whitehousecommunicationsag7207]

HI, Can I use the SSTV video portion of your video for a Technician License Power Point Presentation?

[@loughkb]

Yes, of course. Just be sure to credit me.

[@VE6JMB]

Hi Kevin. Will mmsstv work on windows 10. And your radio are you only using one cable between computer looks like a 7300. Thank you

[@loughkb]

I can't answer the win 10 question since I don't run windows and can't test it. I suspect it should work though. Yeah, the 7300 does both serial (for rig control) and audio over a single USB cable.

[@tifogra689]

It works great on Win7 so it'll probably run also on 10.

[@al-ug3qb]

how well does an indoor dipole work for dx?

[@loughkb]

Not very well, you have a lot of noise sources inside the house, and the housing materials themselves will attenuate the signal slightly.

[@dandruff7807]

Is there an advantage of sstv over using a webcam with a computer & a social network program?

[@loughkb]

It works over radio when no internet is available. ;-)

[@keithjas25]

I guess it is a good way of sending QSL cards as the image can be a card !?!?

[@Jimwill01]

The ISS will at times send SSTV over 2 meters. Then you have to watch for when it will be overhead and tune in.at 145.800. Almost two things at once - satellite tracking (for finding the ISS) and SSTV!

[@loughkb]

Someone elsewhere mentioned that the ISS may be doing SSTV transmissions this weekend. Feb. 9th and 10th. I've got a pass Saturday evening that's pretty good. We'll see.

[@simonj48]

@@loughkb ariss-sstv.blogspot.com/2019/02/announcing-arissnota-slow-scan-tv-event.html started 8th Feb 14:00 UTC. www.spaceflightsoftware.com/ARISS_SSTV/index.php a few images have already been received. The ISS also has their new packet radio model installed and is now fully active again, so you can use ax.25 when it passes over as well using 145.825 for packet radio.

[@shandybrandy5407]

Hi Kevin, you have explained the SSTV brilliantly! Just few days ago a deadly storm in nearly 300 years - cyclone 'Amphan' battered West Bengal state of India resulting complete breakdown of all modes of conventional communications especially in villages situated at the brink of the mighty Ganges river. Following the aftermath of cyclone 'Amphan', a gentleman based in Calcutta (now Kolkata) was anxious about his parents, spouse and offspring who resides in a village close to the Ganges. He approached the Calcutta Ham club and they helped him to unite with his family using the SSTV. Sharing the news link if you would like to read the story:As communications failed post-Amphan, HAM radio club tuned in to save the day indianexpress.com/article/cities/kolkata/as-communications-failed-post-amphan-ham-radio-club-tuned-in-to-save-the-day-6428007/ By the way, I really love the production style of all your videos. They just too good! I am a new Ham and learning a lot from your videos:) Greetings from New Delhi, India. 73s

[@tvbox6955]

... problems here. I found a youtube video with sstv samples. MMSSTV is installed on my laptop and Robot 36 on android cell phone. The same youtube audio was played on the laptop, cell, smart tv and android tablet. Robot 36 didnt work with any, and MMSSTV only worked with the tablet as audio source. This device has mono out, so I set the cell and laptop to mono audio, but that did not work either. What am I doing wrong?

[@loughkb]

Usually, problems are related to sound input. Make sure mmsstv is looking at the right sound input and that you can see the audio on its waterfall display. Also it needs to pick up a good signal without a lot of room noise.

[@tvbox6955]

...problem fixed. The laptop and cell phone both had sound enhancements (active by default) that needed to be disabled. Once this was done, both Robot 36 and MMSSTV now work; but MMSSTV is better.

[@volkinaxe]

ok got it work but how do i take a pic and make a audio file for this ?

[@loughkb]

Received pics will be saved in a qsstv folder in your home directory. You can create one for TX with any graphic program like GIMP. Under one of the menus there is an option to export an audio file of the encoded image.

[@volkinaxe]

@@loughkb ok thanks

[@FuzzyImages]

Are there any recommendations for antennas?

[@loughkb]

Depends on many factors. If you're just receiving, a simple end fed long wire up in a tree would work.

[@FuzzyImages]

@@loughkb Yeah, but I'm not sure how you really just hook a wire or some antenna to a computer, is there any guides on that out there? Or am I just over thinking it?

[@FuzzyImages]

@@loughkb Yeah I was overthinking it, thank you

[@thiesenf]

I might be very late to the party on this one but "tele" meaning "audio"? And "vision" meaning "video"? I my book "tele" means "far" or "remote"... and "vision" means "sight"...

[@kc5vgw]

More like the old telecopier. Yes similar to fax but I remember the sounds from the telecopier

[@GeorgeKarayannis]

tele is greek, means afar (long distance)

[@letstrythistv]

Yep. Vision at a distance. Audio at a distance is telephone.

[@GeorgeKarayannis]

@@letstrythistv literally "voice from afar", yes!

[@loughkb]

Well, now I know.

[@GeorgeKarayannis]

@@loughkb great videos, do keep up teh good work! 73s de SV4LAX

[@batfalcononyoutube]

Well, I think that you have to correct this. TELE is the English pronunciation of the word THΛE (pronounced TILE in Greek) and the meaning is distant, far away, not close. Other word that you English speaking people have borrowed are: Tele - phone. Both parts are Greek. Tele (distant) Phone (from the word ΦΩΝΗ pronounced FONI) meaning Voice. So Telephone in Greek means a Voice that comes from a distance.

[@johnniecash9708]

You look like you're 24 years old, but with gray hair. Good genetics or what? Wow.

[@ScottRobson]

Not for free, but you can get mac software for SSTV here: www.blackcatsystems.com/software/sstv.html (I'm not associated with Black Cat Systems). I do however run a database of logged SSTV images at hflogs.com/SSTV - that website is still being developed so is incomplete, but it is currently logging SSTV images as reported at hfunderground.com chat group www.hfunderground.com:8443/channel/sstv