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  • Weird drift

    From Phigan@VERT/TACOPRON to All on Fri Aug 12 21:29:35 2022
    Anyone know what might cause this? This radio started doing this yesterday.. The waterfall shows a sort of "zig zag" pattern.. Like the signal jumps up a few khz then slowly goes back down a few khz, and repeats. Here are some vids..
    https://imgur.com/a/TysliPq

    I really hope it's not something permanent, but it's the second day now.

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  • From Jared@VERT/JUMPLEFT to Phigan on Sat Aug 13 09:29:25 2022
    Re: Weird drift
    By: Phigan to All on Fri Aug 12 2022 21:29:35


    Anyone know what might cause this? This radio started doing this yesterday.. The waterfall shows a sort of "zig zag" pattern.. Like the signal jumps up a I really hope it's not something permanent, but it's the second day now.

    Looks similar to this https://swling.com/blog/2019/11/contayner-over-the-horizon-radar-site-polluting-the-hf-spectrum/

    But I also note where it's sitting on the spectrum; which is not where I'd expect to find over-horizon radar.

    I've also seen UHF Mics and walkie talkies operate around there too;

    de VK2WAY

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  • From Phigan@VERT/TACOPRON to Jared on Sat Aug 13 13:05:05 2022
    Re: Weird drift
    By: Jared to Phigan on Sat Aug 13 2022 09:29 am

    Looks similar to this https://swling

    I'm on a C= at the moment so will have
    to take a look at the link later. The
    issue seems to also happen on 2meter
    band but in reverse.. the zigzag is
    going in the other direction.

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  • From Belly@VERT/BRAZINET to Phigan on Sat Aug 13 16:08:16 2022
    Re: Weird drift
    By: Phigan to All on Fri Aug 12 2022 09:29 pm

    Anyone know what might cause this? This radio started doing this yesterday.. https://imgur.com/a/TysliPq

    I really hope it's not something permanent, but it's the second day now.

    In the same vein as what Jared said, here is some possible OTH radar that I happened to screenshot a while back. https://i.imgur.com/H0NJmGH.png

    Definitely not near the frequencies you're talking about, though. My first thought was that perhaps you had some rogue device nearby which was
    designed to use the ITU Region 1 ISM band, but that band is located from 433.05 to 434.79 MHz, instead of where you're seeing the signal.

    o
    (O)
    BeLLy

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  • From Phigan@VERT/TACOPRON to Belly on Sun Aug 14 10:37:02 2022
    Re: Weird drift
    By: Belly to Phigan on Sat Aug 13 2022 04:08 pm

    Definitely not near the frequencies you're talking about, though. My first

    It's happening on both 2M and 70CM, though. On 2M it's leaning the opposite way, to the right instead of to the left, but same pattern.

    I saw the swling.com site. Here's something goofy I saw. I don't have a "real" HF antenna hooked up, it's just some super-worthless "loop antenna" I got off Amazon.. https://imgur.com/a/9A5lY7G .. tl;dw: IT MOVES. It started from the very right of the screen and went on past the left of it. I just shot the part where it came in audibly.

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  • From Jared@VERT/JUMPLEFT to Phigan on Mon Aug 15 06:11:24 2022
    Re: Weird drift
    By: Phigan to Jared on Sat Aug 13 2022 13:05:05

    Looks similar to this https://swling

    I'm on a C= at the moment so will have to take a look at the link later. The issue seems to also happen on 2meter band but in reverse.. the zigzag is going in the other direction.

    What does look interesting to me is that it's channelised and not a general sweep.

    de VK2WAY

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  • From Jared@VERT/JUMPLEFT to Belly on Mon Aug 15 06:13:42 2022
    Re: Weird drift
    By: Belly to Phigan on Sat Aug 13 2022 16:08:16

    Definitely not near the frequencies you're talking about, though. My first thought was that perhaps you had some rogue device nearby which was
    designed to use the ITU Region 1 ISM band, but that band is located from 433.05 to 434.79 MHz, instead of where you're seeing the signal.

    That's a high likelyhood too actually looking where it is.

    I had an ISM band weatherstation that was splatting a line of noise across everything from around 30Mhz to 500Mhz every 30 seconds; I soon killed that once I got licensed and noticed it.

    It's been replaced with a similar one but much cleaner signal. Opening up the old one the internal coil had totally coroded and the PCB was a mess. Not surprising it was making so much noise.

    de VK2WAY

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