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Author Topic: What digital mode all across 20M this afternoon?  (Read 941 times)
N3QE
Member

Posts: 2070




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« on: March 25, 2009, 05:23:50 PM »

This afternoon there was some bubbly-sounding digital mode all up and down the CW section of the 20M band.

14.0 to 14.08 MHz, about 2000 to 2400 UTC Mar 25. It may have been more broadband, I didn't bother tuning outside my usual stomping grounds.

What the heck was it?

It was either a whole bunch of narrow-band transmissions or one heckuva broadband transmission.

Some of the DX clusters identified it as coming from the south which I agree with.
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WA3SEE
Member

Posts: 12




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« Reply #1 on: March 26, 2009, 03:53:40 AM »

Copied that signal S-9 in Glen Burnie Maryland. But only 14.015 +/- 500 Hz.  Activity above 14.020 unaffected at 2000Z here.
73 Carl
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N5LRZ
Member

Posts: 0




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« Reply #2 on: March 26, 2009, 08:18:24 AM »

Could it be the mode known as Olivia?  
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N4OGW
Member

Posts: 284




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« Reply #3 on: March 26, 2009, 01:49:35 PM »

See my post in the RFI forum. It is also on sometimes near the bottom of the 7Mhz band.

For a picture see:

http://bellsouthpwp2.net/r/t/rt_clay/40msignal.png


Any digital types recognize what it is?

Tor
N4OGW
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N7KRT
Member

Posts: 17




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« Reply #4 on: March 27, 2009, 10:13:05 AM »

Very loud on 40 lower 20 khz two nights ago. Wondered if it was a variation on over-the-horizon radar. Maybe the Russians set up shop in Cuba or Venezuala...
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NJ2E
Member

Posts: 35




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« Reply #5 on: March 27, 2009, 07:18:58 PM »

One of the biggest offenders is the British base on
Cypress. Here is a link to a very informative video
about OTH (Over The Horizon) radar and its effect on
the ham bands in Asia.

mms://max-server.net/2008_vr2bg
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N3OX
Member

Posts: 8852


WWW

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« Reply #6 on: March 28, 2009, 01:13:46 PM »

Sounds just like the 17m bubblies I've heard in the upper end of the CW portion from time to time for probably 10 years.

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73,
Dan
http://www.n3ox.net

Monkey/silicon cyborg, beeping at rocks since 1995.
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