Hunting For NDBs In CLE288

YNE - 207 Norway House, MB (tnx

Yes! It's CLE time once again. This is a challenge for all newcomers to NDB listening and the ultimate test of your medium frequency receiving capabilities. Can you meet the challenge?

'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 a two-parter this time:

The first part is hunting for the NDBs whose published frequencies are between 190 - 239.9 kHz. With NDBs closing down at a rapid rate, this wider range will offer listeners more targets.

The second part is hunting for the NDBs whose carrier frequencies are 'half-way'. 

E.g. 282.5 RT (AUI), 284.5 MH (TUA), 312.5 KML (SYR), 328.5 EGT (NIR), 400.5 COD (ITA).

A good target for all NA listeners is powerhouse YNE on 207 kHz in Norway House, Manitoba. Listen for its upper sideband CW identifier on 207.405 kHz.

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.

From CLE organizers comes the following info:

Hello all,

Do try not to miss our 288th co-ordinated listening event - it starts this Friday at midday.  This could be an ideal CLE to try out for the first time, but everyone is welcome, as always, of course!


    Days:  Fri. 27th - Mon. 30th January, Midday-Midday, your local time

    NDBs  on frequencies from 190 - 239.9 kHz

    PLUS:  normal NDBs with carriers on 'half-way' frequencies ( nnn.5 kHz )

                from 190.5 - 999.5 kHz


So for all of us it is a CLE in two parts - the first part is hunting for the NDBs whose published frequencies are lower than 240 kHz.

The second part is hunting for the NDBs whose carrier frequencies are 'half-way'. 

E.g. 282.5 RT (AUI), 284.5 MH (TUA), 312.5 KML (SYR), 328 EGT (NIR), 400.5 COD (ITA).

The seek list below includes the ones that are more likely to be logged.


(Europe listeners will hear few or none from part 1, while the

listeners away from Europe will hear few or none from part 2)


Please send your final CLE log to the List, if possible as a plain text email and not in an attachment, showing 'CLE288' and 'FINAL' in its title.

(Loggings from both parts can be shown in the same list)

Please include on EVERY line of your log:


  #  The date (or just the day 'dd') and UTC (days change at 00:00 UTC).

  #  kHz - the beacon's nominal frequency.

  #  The Call Ident.


It is important to show those main items FIRST - any other optional details such as Location, Distance, etc., go LATER in the same line.


Don't forget to give your OWN location (your 6-character Locator if you know it please) and details of your receiver and aerial(s), etc.   Others will be interested to know, especially new members - and old ones with failing memories like mine!

Listening around the 'half-way' frequencies means we might also catch some interesting non-CLE beacons – you can tell us about those too, but in a separate list. 


Joachim and I will be processing the incoming logs as usual - please look out for our 'Any More Logs?' email at about 19:00 UTC on Tuesday evening, with a list to let you check that your own log has been found OK.

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


Good listening

   Brian and Joachim

  (CLE Coordinators)


If you wish you could use any one remote receiver for your loggings,

stating the 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.


For your full seek list in the 190-240 kHz range just go to Rxx ( for your part of the World.

Below is the seek list which includes the ‘nnn.5’ NDBs that are more likely to be heard.

CLE's provide 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!

Steve McDonald, VE7SL, is a regular contributor to and writes from British Columbia, Canada. Contact him at [email protected].

LHS Episode #494: Linux Gaming Deep Dive

Hello and welcome to Episode #494 of Linux in the Ham Shack. This is the first episode for 2023. To ease into the new year, the hosts have chosen a topic based purely in fun: playing games on Linux. Several options are explored and we take a quick look at the new LHS Minecraft server as well. Thanks for listening and have a great week.

73 de The LHS Crew

Russ Woodman, K5TUX, co-hosts the Linux in the Ham Shack podcast which is available for download in both MP3 and OGG audio format. Contact him at [email protected].

Winter Field Day 2023 (Jan 28, 29 UTC)

Join the Winter Field Day!

You do NOT have to operate from a cold location; home operation is an allowed category.

Winter Field Day is a communications exercise. WFD is held on the last full weekend in January. WFD can be worked from the comfort of your home or in a remote location. You can participate by yourself or get your friends, family, or whole club involved. Winter Field Day is open to participants worldwide. Amateur radio operators may use frequencies on the HF, VHF, or UHF bands and are free to use any mode that can faithfully transmit the required exchange intact. Similar to the ARRL’s Field Day, bonus points are earned in several ways, including using non-commercial power sources, operating from remote locations, satellite contacts, and more.

Winter Field Day

Winter Field Day

Winter Field Day is sponsored by the Winter Field Day Association. We passionately believe that Ham radio operators should practice portable emergency communications in winter environments as the potential for freezing temperatures, snow, ice, and other hazards present unique operational concerns. WFD is formatted to help increase your level of preparedness for disasters and improve your operational skills in subpar conditions. Click here to read more about the history and purpose of winter field day.

Do check out the rules, as there are some important things you must know.

During the last weekend in January, ham radio operators worldwide participate in Winter Field Day. We encourage you to grab your radio, get outside and join us during this uniquely challenging event. Click on the links below to view our 2023 Rules and our Resources page. The Resources page has a plethora of information, including FAQs, logging software recommendations, operating aids, and more.


Visit, subscribe: NW7US Radio Communications and Propagation YouTube Channel

What say you?


Here at VE9KK's household, my XYL has returned to part-time work from home and involves a computer and the internet to communicate regarding work. Last week while she was working and I was on the radio she told me her LAN connection kept dropping out. I did some experimenting and sure enough, it was my CW signal on 15m that was doing it. I quickly grabbed my last FT240-43 toroid and wrapped the CAT6 cable around it which did the trick! 

I then did some reading and learned that the CAT cable should be loose around the toroid and not tight as this affects the small wire inside the CAT6. I also read that 7 turns were the magic number of turns. Finally and this is the question to my readers I read two thoughts on wrapping CAT cable around a toroid. One school of thought was it is perfectly fine and the other was it slowed down the internet speed? I never did a speed check on my wife's connection with and without the toroid. The reason for this is she never complained the speed dropped so why poke the bear! Has anyone out there had an issue with your HF signal dropping internet connections at home and what did you do about it? 

Mike Weir, VE9KK, is a regular contributor to and writes from New Brunswick, Canada. Contact him at [email protected].

Radio Skinny-Dipping

I have been working on a homebrew 40 meter CW transceiver for over a year now. It’s a superhet design, with all discrete components built ugly style on copper clad board. I’ve taken various circuit designs I’ve built in the past and added some new ones. The project has been a great opportunity for me to use and learn about the NanoVNA. Every stage I built, tested, and tweaked with the NanoVNA, and recorded results in my lab notebook. The rig features a 4 Mhz IF, mainly due to me having a ton of these crystals. I built wide and narrow filters, just futzing around with various crystal and capacitor combinations, and implemented diode switching of the filters. The filters aren’t commercial grade, but they’re definitely good enough. The final PA uses an IRF510. I had to do several iterations of this before I got something to work. At 12 volts I get 4 or 5 watts, but I normally run it at 24 volts to get 10 watts. I’ve had it up to 36 volts, outputting 20 watts. I’ve been wanting to try 48 volts.

For the longest time the rig was just PC boards on my bench interconnected with alligator clips, but a few months ago I made it a bit more respectable and mounted the PC boards on a pine board and completed some permanent wiring. There are still several alligator clips jumpering things to make it work. I tend to leave the rig on all the time and just listen to it in the background while doing other things in my office/lab/shack. I even leave it on when I’m experimenting with or adding a new circuit, if possible.

I’ve made several contacts here and there when I stumbled upon someone calling CQ for POTA, a contest, or SKCC. I honestly haven’t been doing any logging or any paper code copying. There’s something satisfying about just walking over to the rig, tapping the alligator clip-connected straight key, and having a quick contact. There’s no keyboard, no waterfall, and nothing to navigate with a mouse. It’s just me and a bunch of components communicating over the ether.

Anthony, K3NG, is a regular contributor to

The 1:1 isolation choke do-over.


New 1:1 choke with RG316 coax

 I have the Hustler 4BTV vertical antenna and have a 1:1 choke at the base of the antenna made by Balun designs. Some time ago I made a second choke that was placed at the radio end and posted the build here on the blog. I had a few comments regarding the coax that I used (RG8X) and that there could be an issue with the bending radius of the coax around the core. I was informed that over time the centre conductor could migrate toward the braid.

I also did some internet searching and found that the bending radius could pose an issue and I know the "issue" if and when it happened would do so at the most inopportune time. I decided to make another 1:1 choke from a thinner coax. I did have some RG316 coax from a mobile antenna mount I was not using and it would be ideal for the tight turning radius.

 On one end of the coax, there was a mini-UHF to PL-259 adapter which meant I only had to add one PL-259 connector. I will be using again an FT240-31 core with 10 turns. I decided on 10 turns as this will afford me decent characteristics on the HF bands. Using the RG316 coax the bending radius is no longer an issue. 


Mike Weir, VE9KK, is a regular contributor to and writes from New Brunswick, Canada. Contact him at [email protected].

First Ever: Olivia Digital Mode on HF Weekend QSO Party

Announcement: Special Event Weekend, 02/11/2023


When is this special QSO party?

Valentine’s Day Weekend.  This event is held this year on February 11, 1400 UTC, through February 13, 0200 UTC

First Ever Valentine's Day Special QSO Weekend Event: The Olivia Digital Mode on HF

First Ever Valentine’s Day Special QSO Weekend Event: The Olivia Digital Mode on HF

Join our mailing group for live interaction with other Olivia users:

Sponsored by the Olivia Digital DXers Club (on Clublog, and on Facebook: Olivia Digital Mode on HF Radio (Contestia included))

Example frequencies:

Olivia Digital Mode Suggested Calling Frequencies on HF

Olivia Digital Mode Suggested Calling Frequencies on HF

Certificate for participants, and more.  Organizer: Tomas Hood (NW7US), PO Box 110, Fayetteville, OH 45118.

This is the FIRST ever weekend QSO party for Olivia.



Visit, subscribe: NW7US Radio Communications and Propagation YouTube Channel

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