680 and carrier monitoring in general

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John Faulkner, Skegness
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680 and carrier monitoring in general

Post by John Faulkner, Skegness » 21 Jan 2016 16:51

I thought I ought to bring this here for now, rather than continue in the DX Alerts. This is a fairly specialist subject and I know some of you are really keen to hear KBRW.

The ionosphere has taken a bit of a beating over the last 24 hours and I didn't expect to see any carriers on 680 kHz. But there are four visible as I type and two of them are new! I have:

679.992
679.999
680.001
680.014

No trace of the usual 'higher' carrier.

My calibration is .005 high, measured against BBC 909, so I think I have adjusted things to be 'close enough'.

679.999 and 680.001 are too close to 68.000 to be certain which one might be KBRW. There's also another, higher carrier at 680.092 which looks too stable to be a propagated signal, so likely some local QRN.

I used to be heavily into carrier monitoring a few years ago, but on band 1 TV and I wondered if there was still any interest in this side to the hobby? Does the MW Carrier Group still exist I wonder?

I was also wondering if now would be a good time to try to revive this side to the hobby and make some preparations in view of having a solar minimum on the way in a few years?

Where does 1548 4QD sit these days?

I know you are keen on this Tim. Anybody else?

Tim Bucknall
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Re: 680 and carrier monitoring in general

Post by Tim Bucknall » 21 Jan 2016 17:15

thanks for the alert, sadly either the local noise floor is too high or the loop doesn't give enough gain

the offsets group is alive and well https://groups.yahoo.com/neo/groups/mwoffsets/info
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John Faulkner, Skegness
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Re: 680 and carrier monitoring in general

Post by John Faulkner, Skegness » 21 Jan 2016 17:46

Thanks Tim!

So it is! I should have checked my Yahoo Groups list. I am a member of more than 30 groups on there and I must confess I have set most of them to "Webmail Only".

Fantastic to see the MW Offsets group is still going strong.

Pascal Duval
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Re: 680 and carrier monitoring in general

Post by Pascal Duval » 21 Jan 2016 17:59

Hello, i can have big problem for these frequencies because Spain is very dominant with my welbrook 1530 active loop antenne. But Spain is dominant all the evenings on many MW frequencies to a point they become a problem for the loop antenne null the signals .

Pascal


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John Faulkner, Skegness
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Re: 680 and carrier monitoring in general

Post by John Faulkner, Skegness » 21 Jan 2016 18:27

That's a shame Pascal. I think many of us understand this problem as we too have the same problem. Even in the North of Scotland I have heard Spain arriving from the rear of a Beverage at times.

We like to receive Spain of course but not when we are looking further afield. ;)

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Re: 680 and carrier monitoring in general

Post by John Faulkner, Skegness » 21 Jan 2016 18:46

I didn't really expect to see 1548 4QD in Emerald, Australia with these conditions, also bear in mind my flag is pointing at roughly 345 degrees. But I noticed another sprinkling of smeariness.

1548 21-01-16 1800 https://app.box.com/s/8i1ltykf351hlf29ucjliqh8214h70ft

Checking the propagation maps I see this coincides perfectly with yet another geomagnetic disturbances.

Funny how the carriers in the lower portion of the spectrum are unaffected. I assume they must be stations from a more southerly bearing or are locals.

Alex Cator
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Re: 680 and carrier monitoring in general

Post by Alex Cator » 21 Jan 2016 21:18

Pascal Duval wrote:Hello, i can have big problem for these frequencies because Spain is very dominant with my welbrook 1530 active loop antenne. But Spain is dominant all the evenings on many MW frequencies to a point they become a problem for the loop antenne null the signals .
I'd guess that Spain has the second-most-crowded MW band in Europe! (Of course the UK has the most crowded MW band in the whole of Europe, our MW band is claustrophobically swamped full of Absolute and BBC Local Radio, and especially Smooth Radio!!!! :evil:)

Alex Cator
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Re: 680 and carrier monitoring in general

Post by tvdxrools » 23 Jan 2016 09:00

here is how KBRW was sounding a few years back on a indoor flag antenna here in Scotland
https://www.youtube.com/watch?v=QmQa96F2hQM
beverage still not in use at the moment but now the snow has gone hopefully in the coming days , cheers David
perseus sdr
400m beverage

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