Recent comments

  • 15 august re-scheduled contact to school in germany !   1 day 2 hours ago

    sorry error ! 16 august !!! 73

  • ISS Frequencies   3 days 3 min ago

    This is great. Website

  • ISS Frequencies   1 week 4 days ago

    deteccted what appeared to be telemetry on this frqs on the 5th Aug 2018 at 0729 UTC today

  • ISS Radio Report   2 weeks 1 day ago

    The crew actually did give some extra time (just not enough for the west coast). The experiment was scheduled to stop about 19:00 UTC each day but it appears the crew member let it run closer to the crew sleep time (which is 21:00 UTC). That allowed for nearly 1 more orbit of operational time.

  • ISS Radio Report   2 weeks 2 days ago

    I have a few great passes in So California - but no SSTV. Seems like they REALLY are sticking to the published project times!

    Here are some captured images from this project:

  • SSTV trasmissions continue by ISS !!!   2 weeks 6 days ago

    SSTV by ISS on July 30 and 31 - INTER-MAI-75 !

    Looks like the folks at MAI will have an experiment run right at the end of July.

    Crew timeline shows activation of the SSTV system beginning with setup starting at 16:00 UTC on July 30.

    The system will be powered down that same day at 19:30 UTC.

    The next day (July 31), the system will be again active from 13:25-19:15 UTC.

    Downlink is presumed to be on the traditional 145.800 MHz frequency.

    Mode will likely be PD120 but not officially known at this time.

    we follow this events in our Facebook Group here :

    Stay tuned …. Best 73 de IW2BSF Rudy

  • SSTV trasmissions continue by ISS !!!   3 weeks 2 days ago

    MAI will have a #SSTV experiment run starting at 16:00 UTC on July 30 and powered down at 19:30 UTC. The next day (July 31), the system will be active from 13:25-19:15 UTC. Downlink should be on the traditional 145.80 MHz frequency. Mode will likely be PD120.

  • Kenwood THD72 tone setting for satellites   3 weeks 4 days ago

    67.0 PL means "PRIVATE LINE" tone setting 67.0 Hz.
    PRIVATE LINE is the same as CT and CTCSS in most radio amateur equipment. PL is a more common expression in professional equipment ( e g Motorola)
    Difference between T en CT in Kenwood equipment: T is Tone burst, CT is Continuous Tone ( CT same as in CTCSS )
    What you need: 67.0 HZ CT (same as 67.0 PL and same as 67.0 Hz CTCSS) only in transmit.

    Greetings from Belgium.

    Jan, ON7TX

  • SSTV trasmissions continue by ISS !!!   5 weeks 4 hours ago

    No they don't, the SSTV transmissions were stopped on july 9th

  • SSTV Image Question   5 weeks 5 days ago

    Have just received the first uncropped PD120 images in this series

  • SSTV Image Question   5 weeks 5 days ago

    Mike - here are the twelve images for this project ...

    Here are the twelve images sent/received last week!

    Are any of these what you saw???

    Clint K6LCS

  • Kenwood THD72 tone setting for satellites   5 weeks 5 days ago

    "CT" is "closed tone" - where you will TX the tone, but also not hear anything unless it also is transmitting that tone!

    SO ... "T" is what you want - keep RX "open tone."

    On Yaesu, TSQ is "tone SQ" - both TX and RX. NOT what we want - just a TX tone.

    Personally - out here in So CA - I never program terrestrial repeaters "closed tone." Most do NOT transmit their tones
    through to the output. But for those which do - what if I was closed-tone on the local machine, but there was a conversation
    occurring fifty miles away on the same frequency pair? I would be guilty of unintentional interference. Keeping my "top fifty"
    or so memories in my mobile rigs "open tone on receive" causes no problems whatsoever ... and it makes me a more responsible
    ham ...

    The four memories i DO have "closed tone" are a couple weird simplex freqs used for events. But, as we always should, monitor
    even those freqs for traffic to make sure you are not interrupting anyone.

    Clint K6LCS

  • Best antenna for VHF contact   6 weeks 3 days ago

    I was able to get 7 of the 12 pix P5 mostly with the delta loops since most passes were around 20 degs elevation. no daylight overhead passes. no moving antennas. 2.5 pix heard most passes again to a bad area for me - north. Thanks for the pix!!!! 73s de larry n3cr PA USA

  • 30 June heard beacon/alarm tone?   6 weeks 3 days ago

    I left the rig and computer on pretty much for the whole SSTV event and got some pretty good images. More importantly I love events like this I find them exciting and really appreciate the crew taking the time doing these events. Also it's a good reminder the ISS is up there and sometimes passes overhead.

    Mike / N8GBU

  • 30 June heard beacon/alarm tone?   6 weeks 4 days ago

    I managed to grab half the image on the next good flyover!

  • 30 June heard beacon/alarm tone?   6 weeks 5 days ago

    Ah! That explains it. Thanks for your help!

  • 30 June heard beacon/alarm tone?   6 weeks 5 days ago

    You're likely hearing the SSTV signal currently being sent on the 145.800 downlink. ISS is sending images.

  • Kenwood THD72 tone setting for satellites   6 weeks 5 days ago

    Its tone is 67.0 Hz, however, you may need a one time shot at 74.4 to turn on the repeater. If you know the sat is there but you're not getting in and don't hear any other stations, try 74.4Hz, but just once.


  • ISS Radio Report   6 weeks 5 days ago

    signal very strong in my country ,brazil .2 pictures received,73

  • sstv June 29, 2018   6 weeks 5 days ago

    Picture from June 29,2018 at 1316 UTC when Satellite over grid dm42 Arizona U.S.A.

  • Best antenna for VHF contact   7 weeks 9 hours ago

    I currently rely on a turnstile with 6ft square reflector made with screening . I get many nice sstv pix moving antenna twice per pass. I use a 4 element Delta Loop for low horizon passes. it has a wide use of frequencies for simplex and repeaters. again good results especially if you can rotate it. switching between both and hear from horizon to horizon. easy to build with pvc wire wood boom. don't look like much but check my log!!!! The results tell it all. Larry N3CR EPA FN20dt For other UHF I use another turnstile and reflector. Sometime a Quagi uhf 10 element.

  • Kenwood THD72 tone setting for satellites   7 weeks 11 hours ago

    You should have T on the display, CT stands for CTCSS, which is not what you want in this case.

  • Best antenna for VHF contact   7 weeks 1 day ago

    The hardware is not so much an issue as the availability of someone to talk to you from the ISS. The few crew members that are licensed rarely use the ham radio as a social outlet. Occasionally there is one person aboard that likes to chat and that is when the better equipment helps as you are competing with dozens of other ground operators. Think of a DX pile up on your local FM repeater. That is what it is like for the crew on the ISS trying to talk to folks on the ground. Doug Wheelock has a nice video showing what it is like to operate the ham radio from ISS in his tour of the ISS video.

  • Best antenna for VHF contact   7 weeks 2 days ago

    We are expecting some Russian SSTV images soon ... otherwise, there is nothing to "contact"
    on/from the ISS ...

    And J-poles are miserable for this. You need gain and directionality. A $15 tape measure
    beam will out-perform any omni-directional. Plans to make some simple, high-gain
    antennas on the ANTENNAS page at

    ARISS would prefer that we NOT use the recently posted repeater pair for FM
    voice work.

    That was a test of the Tanusha birds, and NOT an open invitation to use it as an
    ISS FM Voice repeater. Something definitely went wrong with the Russians' plan
    for the testing. And that downlink frequency is - well, kind of like the US' 146.520 as
    it is a common terrestrial frequency in Europe.

    And the 15-year-old Kenwood D-700 cannot take that amount of ops, as its fan/cooling
    is not adequate for such continuous operations.

    BUT THE GOOD NEWS: This will all change with the next generation of ISS ham
    gear: the IORS. Its FM voice repeater transceiver will include a more robust fan and
    special firmware to make voice repeating a regular capability through the ISS.

    YOUR DONATIONS are needed! Here's an ARISS FUNDRAZR link:

    And, as always, watch for more information!


  • SSTV Image From VK4EM Via ISS Repeater   7 weeks 3 days ago

    Hello VK4LV maybe you would like to please tell us what you were using at the time to Receiver these SSTV Downloads through the Repeater on ISS ??


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