Tuesday, 23 November 2021

Hunting For NDBs In CLE 274

 

ZWG - 287kHz Winnipeg courtesy: http://www.ve3gop.com/

 I know it's hard to believe but it's CLE time once again. How quickly time zooms by. 

 
'CLE's are 'Co-ordinated  Listening Events, and NDB DXers around the world focus their listening time on one small slice of  the NDB spectrum.
 
It's back to an 'almost normal' activity but with a slightly wider frequency span: 270.0 - 319.9kHz

A 'mid-continent target' for listeners in North America is ZWG - 287kHz in Winnipeg, Manitoba. Listen for ZWG's upper sideband on 287.368kHz. ZWG's 17 watts is widely heard throughout North America.

When tuning for NDBs, put your receiver in the CW mode and listen for the NDB's CW identifier, repeated every few seconds. Listen for U.S. NDB identifiers approximately 1 kHz higher or lower than the published transmitted frequency since these beacons are modulated with a 1020 Hz tone approximately.

For example, 'AA' near Fargo, ND, transmitted on 365 kHz and its upper sideband CW identifier was tuned at 366.025 kHz while its lower sideband CW ident could be tuned at 363.946 kHz. Its USB tone was actually 1025 Hz while its LSB tone was 1054 Hz.

Often, one sideband will be much stronger than the other so if you don't hear the first one, try listening on the other sideband.

Canadian NDBs normally have an USB tone only, usually very close to 400 Hz. They also have a long dash (keydown) following the CW identifier.

All NDBs heard in North America will be listed in the RNA database (updated daily) while those heard in Europe may be found in the REU database. Beacons heard outside of these regions will be found in the RWW database. These databases have recently been re-vamped and are slicker than ever before!

From CLE organizers comes the following CLE info:


Hello all

Here are brief details for our 274th co-ordinated listening event next weekend.

It spans a 50 kHz frequency range - about three times wider than usual. 

In that range, the Rxx database is showing about 200 active NDBs located in Europe, 120 in North America, 35 in Oceania.  The numbers are approximately doubled if you include DX from other parts of the World that have been heard from each of those three regions.

    Days:     Friday 26 November – Monday 29 November
    Times:   Start and end at midday, your LOCAL time
    Range:   270.0 - 319.9 kHz  (NDB signals only)

Part of the frequency range also has DGPS signals among the NDBs.

We last listened on these frequencies in CLE259 in August 2020.

Any first-time CLE logs will be very welcome, as always.

Please log all the NDBs (within the frequency ranges specified) that you can identify plus any UNIDs that you come across there.

 Send your final log to the List (not in an attachment, please) with 'CLE274’ and ‘FINAL' in its title (important).

 Show on each line:

    #   The Date (e.g.  '2021-11-26', etc.,  or just '26' )

    #   The Time in UTC (the day changes at 00:00 UTC).

    #   kHz  - the nominal published frequency, if known.

    #   The Call Ident.


Please show those main items FIRST.  Other optional details such as Location and Distance go LATER in the same line.

As always, of course, tell us your own location and give brief details of the equipment that you were using during the Event.

We will send the usual 'Any More Logs?' email at about 19:00 UTC on Tuesday so you can check that your log has been found OK.

Do make sure that your log has arrived on the List by 08:00 UTC on Wednesday 01 December at the very latest.

We hope to complete making the combined results within a day or two.

You can soon find full details about current and past CLEs from the CLE page http://www.ndblist.info/cle.htm    It includes access to the CLE274 seeklists for your part of the World, prepared from all the previous loggings in Rxx.

Good listening

- enjoy the CLE.

     Brian and Joachim

------------------------------------------------------------------

From:      Brian Keyte G3SIA      ndbcle'at'gmail.com

Location:  Surrey,  SE England     (CLE coordinator)

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  (If you would like to listen remotely you could use any one remote  receiver for your loggings, stating its location and owner and with their permission if required.  A remote listener may NOT also use
another receiver, local or remote, to make further loggings for the same CLE)


These listening events serve several purposes. They

• determine, worldwide, which beacons are actually in service and on-the-air so the newly-re-vamped Rxx online database can be kept up-to-date

• determine, worldwide, which beacons are out-of-service or have gone silent since the last CLE covering this range


• will indicate the state of propagation conditions at the various participant locations


• will give you an indication of how well your LF/MF receiving system is working


• give participants a fun yet challenging activity to keep their listening skills honed


Final details can be found at the NDB List website, and worldwide results, for every participant, will be posted there a few days after the event.


The NDB List Group is a great place to learn more about the 'Art of NDB DXing' or to meet other DXers in your region. There is a lot of good information available there and new members are always very welcome. As well, you can follow the results of other CLE participants from night to night as propagation is always an active topic of discussion.

You need not be an NDB List member to participate in the CLEs and all reports, no matter how small, are of much value to the organizers.

Remember - 'First-time' logs are always VERY welcome!

Reports may be sent to the NDB List Group or e-mailed to CLE co-ordinator, Brian Keyte (G3SIA), whose address appears above. If you are a member of the group, all final results will also be e-mailed and posted there.

Please ... give the CLE a try ... then let us know what NDB's can be heard from your location! Your report can then be added to the worldwide database to help keep it up-to-date.

Have fun and good hunting!

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