Time signal intruder

Discussion in 'Ham Radio Discussions' started by KA2FIR, May 27, 2018.

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  1. AD0HT

    AD0HT Ham Member QRZ Page

    I have seen this signal on 20 and 40 m most days for the last few weeks. It moves all over the band, seems to like to settle in on qsos.....
  2. N1OOQ

    N1OOQ Ham Member QRZ Page

    10105 at 2000Z. Very loud.
  3. KK5JY

    KK5JY Premium Subscriber QRZ Page

    Any FCC enforcement yet? ;)
  4. N1OOQ

    N1OOQ Ham Member QRZ Page

    I'm gonna go out on a limb and say, "No." :(
  5. KA2FIR

    KA2FIR Ham Member QRZ Page

    I've been hearing in on 30 and 40 lately.
  6. W0PV

    W0PV Ham Member QRZ Page

    Right now, 1200Z 2018-12-04, there is a tick signal on 7000 Khz. It seems to be zero beat on that number. Does that mean its intruding into the amateur band or not?

    It also seems to be ticking at a different rate then previous reports. Faster then once per second. Perhaps a skipped tick or stutter very infrequently. But steady, no interruptions or frequency changes.

    Here is an audio clip. Note during the clip I switch from CW mode to USB and retune, and later tune again to check the zero beat frequency.

    It was peaking strongly to S9 here in FL. Verified it via the K3FEF WebSDR where it seemed weaker. Another audio clip from it here.

    Can also hear it on KFS WebSDR, louder, peaking -86 dbm. Audio clip. Other SSB intruders on opposite on LSB can be heard and seen under the ticks.

    It is also being reported on HF Underground with interesting analysis, 2 PPS, apparently not sync'ed to any obvious standard, xmitting 24/7.

    It is being heard on many other HF frequencies with round numbers, 500-1000 Khz apart from 5.5-16 Mhz. It cleverly avoids QRM'ing WWV by being 10 Khz higher, ie 10010 Khz.
    Last edited: Dec 4, 2018
    N0TZU likes this.
  7. N0TZU

    N0TZU Platinum Subscriber Platinum Subscriber QRZ Page

    I just listened from my QTH in CO at around 1250Z and can hear the 2 PPS signal on 2.000, 3.000, 3.5000, 4.000, 4.500, 5.010 and 5.500 (very faintly). Couldn't hear it at 2.510 as expected from the sequence and skipping WWV.

    Looking at HF Underground I don't think the 2.000 frequency has been reported before.
  8. W0PV

    W0PV Ham Member QRZ Page

    Nice catch. Being heard on 2 MHz only in CO this time of day may indicate its origin being in the Midwestern region of the USA, perhaps correlating with the previous tick signal that was localized to the Chicago area.

    Just now I observed it on 16 MHz with an interesting artifact, what sounds like an echo, or a multipath delayed reception tick, ie, global round trip propagation. Listen closely to this clip, the secondary tick signal is far weaker and only milliseconds after the much louder tick.

    Right now I can hear the primary on nearly all reported frequencies above 5 MHz, but have only heard the echo on 16 mHz.
    N0TZU likes this.
  9. N0TZU

    N0TZU Platinum Subscriber Platinum Subscriber QRZ Page

    I heard it today Dec 6 about 2300 UTC on the frequencies below (checked every 500 kHz from 2.000 to 16.000 MHz). Later when checked at about 2330 it was gone on all of them. I didn't hear it on 4.500.

    3.000 (very weak)
  10. W0PV

    W0PV Ham Member QRZ Page

    Heard here very loud yesterday 02/20/19 @ 11:24Z, on 10100 KHz early pinning the S meter close enough to the XX9D CW action @ 10102 KHz to cause QRM. Was also spotted that day by W4TTY.

    The pulse shape sounded a little different to my ears. Rate was very consistent, no missing dits. Audio clip here.

    More probable spots today on 30m as "P1NG" from K9PG. I see some reports within the last two weeks covering other bands on the HF Underground thread as well.
    Last edited: Feb 21, 2019
    N0TZU likes this.

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