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Author Topic: Poor conditions, interference  (Read 752 times)
Ed H
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« on: August 07, 2017, 2140 UTC »

Hi Folks,

Monitoring this past 5th 6th August, showed very weak conditions. A feint spectrogram trace of signals in the 13,555.xxx mini band, not readable.

Often I am getting a rapid repeating swept signal. It passes through the 22m band perhaps 2x per sec, and has a swept range of at least 100 kHz. Signal strength is up to S7 at times, but has characteristics suggesting it is reaching me as a skywave. Any ideas? This emission precludes any weak signal work, as one might imagine. It isnt CODAR as we get that too sometimes.

Cheers,

Ed
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Ed H
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« Reply #1 on: August 07, 2017, 2144 UTC »

My Bad.... this signal is CODAR.

Which means at times I have another more rapid "buzzer" like interference which is something else.
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ChrisSmolinski
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« Reply #2 on: August 09, 2017, 1423 UTC »

I've had some sort of a fairly wide (several kHz) QRM source right on 13560 for a while now.  I've not had much luck picking up any of the 22 meter beacons for ages now. Not sure how much of that is propagation, how much the antenna (the 670 ft sky loop may not be ideal for this band) and how much is the assortment of QRM sources.
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Chris Smolinski
Westminster, MD
eQSLs appreciated! Send to: csmolinski@blackcatsystems.com
JRC-NRD 545 / RF Space netSDR / 670 ft horizontal loop / 500 ft beverage / 43mb sloping folded dipole / 7' x 7' Loop
Ed H
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« Reply #3 on: August 29, 2017, 2328 UTC »

I think most of the problem is conditions. Interference is sporadic enough in nature here that beacons have a chance if one is patient. I've had rather little time to listen of late, so have not been following any trends in propagation. This weekend should allow some time for radio.

Also need to do some aerial checks on PVC - preventative maintenance etc.
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tesla
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« Reply #4 on: September 05, 2017, 1652 UTC »

condx will improve with fall coming
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