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Author Topic: New ditter maybe, 7000.68 kHz, Oct 22, 2016, 1700 UTC  (Read 2046 times)

Offline Token

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New ditter maybe, 7000.68 kHz, Oct 22, 2016, 1700 UTC
« on: October 22, 2016, 1913 UTC »
There appears to be a ditter on about 7000.65 kHz.  I am pretty sure I have seen this ditter before, but it is such a long period and so weak I always thought it was noise / RFI / something else.  But today it is strong enough to be clear, this is not local noise.

It is a dit, about 0.17 sec long, sent every 22 seconds.  There is a very slight chirp on the dit.  The frequency at 1700 UTC was 7000.68, and at 1900 UTC it was 7000.63, so there is a little drift to it.

(edit) This signal has definitely been here for a while.  I have a recording from 2 weeks ago with it clearly present, and one from several months ago with what is probably the same signal in it.  I'll have to look back at older spectrum recordings, if I have any for that freq range, and see if I have any older that include it.

(edit2)  It turns out the 6990 to 7010 kHz range is not one I record often.  I have a recording from early October 2016 that clearly shows this ditter there.  I have a recording from July 2016 that clearly shows it present.  I have a recording from Feb 2016 that may show it, there is a lot of interference and I am not 100% sure.  And I have a recording from early Dec 2015 that does not show the ditter there at all.  So, at a guess this ditter showed up after early Dec 2016 and before July 2016, with a reasonable possibility of between early Dec 2015 and Feb 2016.

(edit3) This ditter can be heard on other remotes in California, and was also reported as heard in Washington state.

T!
« Last Edit: October 22, 2016, 2315 UTC by Token »
T!
Mojave Desert, California USA

Offline Token

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Re: New ditter maybe, 7000.68 kHz, Oct 22, 2016, 1700 UTC
« Reply #1 on: October 23, 2016, 1422 UTC »
This ditter appears to be daytime only.  Watching and recording this morning I caught the turn on, the signal was not there and then it was, no fade up with band conditions.

And that puts my guess as to first operation dates in a bad place, one of the recordings I was basing that guess on was a night time recording, so that is out the window.

T!
T!
Mojave Desert, California USA

Offline mark-n-nut

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Re: New ditter maybe, 7000.68 kHz, Oct 22, 2016, 1700 UTC
« Reply #2 on: October 23, 2016, 1734 UTC »
I am hearing it over here in northern Utah this morning.  Some QSB. 

73, Mark
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Wellbrook 1530 Loop
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QTH - Northern UT (NUT)
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Offline mark-n-nut

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Re: New ditter maybe, 7000.68 kHz, Oct 22, 2016, 1700 UTC
« Reply #3 on: October 24, 2016, 0138 UTC »
Am copying it after my local sunset.  Also hearing a "M" at 7001 KHz about 6 secs apart.  Not sure if this is a channel or marker beacon?  Or something else that is new.

Mark
R-75
Wellbrook 1530 Loop
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QTH - Northern UT (NUT)
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Offline Token

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Re: New ditter maybe, 7000.68 kHz, Oct 22, 2016, 1700 UTC
« Reply #4 on: October 24, 2016, 0150 UTC »
Yeah, I noticed that M on 7001 kHz a couple of hours ago, I do not think it is one of the Russian marker beacons, I do not hear it on European remotes and I should not have had propagation to far east Russia when I first saw it.

I also still have the ditter on 7000.68 kHz, after my local sunset.  I have been watching it to see when it goes away...if it does.

T!
T!
Mojave Desert, California USA

Offline ChrisSmolinski

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Re: New ditter maybe, 7000.68 kHz, Oct 22, 2016, 1700 UTC
« Reply #5 on: October 24, 2016, 1018 UTC »
I have M on 7001 at 1017z on 24 Oct 2016.
Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
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Offline Token

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Re: New ditter maybe, 7000.68 kHz, Oct 22, 2016, 1700 UTC
« Reply #6 on: October 26, 2016, 0404 UTC »
Shoot, I don't know if this new ditter is daytime only or not.  I think I have seen it turn on a couple mornings in a row, not fade up but turn on.  However they were very different times, seemingly not tied to sunrise.  And right now it is 0400z, well after dark anyplace in the contiguous US, and I still hear the ditter, not strong, but present.

Maybe someone who has this stronger can watch for it in the morning to turn on, if indeed that is what is happening.

T!
T!
Mojave Desert, California USA

Offline Token

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Re: New ditter maybe, 7000.68 kHz, Oct 22, 2016, 1700 UTC
« Reply #7 on: October 27, 2016, 1108 UTC »
Yeah, I noticed that M on 7001 kHz a couple of hours ago, I do not think it is one of the Russian marker beacons, I do not hear it on European remotes and I should not have had propagation to far east Russia when I first saw it.

I also still have the ditter on 7000.68 kHz, after my local sunset.  I have been watching it to see when it goes away...if it does.

T!

Not heard the M for a couple of days now, is the op messing with HFU, or is that just the fickle mistress propagation?  ;)

T!
T!
Mojave Desert, California USA

 

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