Good LW condx

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Julian Hardstone
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Good LW condx

Post by Julian Hardstone » 17 Aug 2017 12:09

There was thunder here last night so I put on a LW rx to listen for lightning and conditions seemed unusual, not that I often tune across LW these days

The two European regulars were particularly clear on 183 & 234, while on 252 IRL was in the clear, with ALG only heard by careful nulling on the portable. RMC was fair on 216, Satelor was good on 153, and CZE on 270, and to my surprise Iceland was at a listenable level on 189.

Maybe these were typical condx that I didn't recognise, I shall check more often. The rx was an old analogue portable Grundig Yacht Boy 100 which is sensitive on LW

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Julian Hardstone
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Re: Good LW condx

Post by Julian Hardstone » 17 Aug 2017 12:31

On second thoughts, it is likely that the heavy rain had reduced the qrn from the HV powerlines which normally limits what I can hear. They are at thier most noisy in strong sunlight

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John Faulkner, Skegness
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Re: Good LW condx

Post by John Faulkner, Skegness » 17 Aug 2017 13:24

We had quiet geomagnetic conditions most of yesterday, ahead of a disturbance which arrived during the evening, so conditions to the north-west would have been enhanced, briefly.

Asia was good on MW too with clear speech from HLCA 972, BEL3 1143 and HLAZ 1566. China on 1377 was good and 100% copy just before 2100.

Brookman Spark
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Re: Good LW condx

Post by Brookman Spark » 20 Aug 2017 11:54

A 24-hour trace of signal strength for some long wave stations is provided at the Twente Netherlands remote receiver:

http://websdr.ewi.utwente.nl:8901/ice.png

It includes Iceland's 189 and 207.

I don't know if an archive will be added so that days can be compared.

From personal observation Iceland's 189 can offer unexpected highs in full daylight. And more generally, daytime prop on LW and higher MWavelengths holds some mysteries still to be explained. Correlations with geomagnetometer readings (ideally within the propagation path) would certainly make a good study.

There is also an analysis of LW and MW propagation during the 2015 "Atlantic" eclipse:

http://wwwhome.ewi.utwente.nl/~ptdeboer ... lipse2015/

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