Hunting For NDBs in CLE280


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 back to an 'almost normal' activity but with a slightly wider frequency span: 350.0 - 369.9 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 CLE info:

Hello all

Our 280th Co-ordinated Listening Event is almost here.

Can new 'listening eventers' join in too?   YES, PLEASE! 

Joachim and I are always pleased to help first-time CLE logs through the harvester program.


     Days:     Friday 27 May - Monday 30 May

     Times:   Start and End at midday, your LOCAL time

     Range:   350.0 - 369.9 kHz   


Please log all the NDBs you can identify that are listed in this range (it includes 350 kHz but not 370) plus any UNIDs that you come across there.

You can find full information to help you, including seeklists made from REU/RNA/RWW, by going to the CLE page and clicking on  CLE Seeklist  there.


Please send your 'Final' CLE log to the List, if possible as a plain text email and not in an attachment and - important - with 'CLE280' and 'FINAL'

in its title.

Please show the following main items FIRST on EVERY line of your log:


  #   The full Date (e.g. 2022-05-27) or just the day (e.g. 27)

         and UTC (the day changes at 00:00 UTC).

  #   kHz - the beacon's nominal published frequency, if you know it.

  #   The Call Ident.


Optional details such as Location and Distance go LATER in the same line.

Please always include details of your own location and brief details of the receiver, aerial(s), software  and any other equipment you were using.


Joachim or I will send the usual 'Any More Logs?' email at about 20:00 UTC on Tuesday so you can check that your log has been found OK.

Make sure that your log has arrived at the very latest by 08:00 UTC on Wednesday 1 June.   We hope to make all the combined results within a day or so.


Good listening



From:      Brian Keyte G3SIA        ndbcle'at'

Location:  Surrey,  SE England       (CLE coordinator)



(Reminder:  If you wish you can use a remote receiver for your loggings, stating its location and owner -  with their permission if required.

A remote listener may NOT also use another receiver,  whether local or remote, to obtain 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!


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

ICQ Podcast Episode 377 – On the Cusp of a Scientific Revolution?

In this episode, Martin Butler (M1MRB) is joined by Frank Howell K4FMH, Edmund Spicer M0MNG and Ed Durrant DD5LP to discuss the latest Amateur / Ham Radio news. Colin (M6BOY) rounds up the news in brief and in the episode's feature On the Cusp of a Scientific Revolution?

We would like to thank our monthly and annual subscription donors for keeping the podcast advert free. To donate, please visit -

  • Two Students Aged 10 and 11 Get Ham Radio Licenses
  • Radio Hams to Show off Skills During Field Day Event
  • 6177km (3838 mi) QSO in FM 10 Metres Frequency 29.600 MHz
  • Wireless Power Transmission Using 10 GHz
  • England Queen's Platinum Jubilee Special Event
  • Founders' Trophy Award
  • Heil Ham Radio Rebrand
  • RSGB Commonwealth Games Activities

Colin Butler, M6BOY, is the host of the ICQ Podcast, a weekly radio show about Amateur Radio. Contact him at [email protected].

Don’t Look Back! They Might Be Gaining On You…or the emergence of the premium HF transceiver

The old quote attributed to the iron man of baseball, Satchel Paige, about not looking back is what I thought of as I posted my latest page in my new Sherwood Tools section of the website. The emergence of the premium HF transceiver is the focus of much discussion, rants and downright fistfights in the kitchen to paraphrase a research methods text. Such a topic is ripe for statistical analysis using best-available data. I’ve tried to do that in this new page of tools to use to shape your thinking about pulling the trigger on a premium HF transceiver. In this market? How could you not use all the evidence available to you?

The Sherwood Tables are the basis of that data with the addition of the market-entry price and year. The focus is: who invented the premium transceiver? Well, it wasn’t Hilberling although at $20,000 in 2021 US Dollars that might be a good guess. Head over to this page to see by clicking here.

If you’re heading to Hamvention, it might be a good time to check the graphics out before making a decision. If you’re sitting this one out, it’s a great time to review what I have posted there. I understand Rob NC0B will feature these tools at his talk—Transceiver Performance for the HF Contest and DX Operator— for Contest University.

Frank Howell, K4FMH, is a regular contributor to and writes from Mississippi, USA. Contact him at [email protected].

LHS Episode #467: The Weekender XCI

It's time once again for The Weekender. This is our departure into the world of hedonism, random topic excursions, whimsy and (hopefully) knowledge. Thanks for listening and, if you happen to get a chance, feel free to call us or e-mail and send us some feedback. Tell us how we're doing. We'd love to hear from you.

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].

AmateurLogic 169: Not Another Friday The 13th

AmateurLogic.TV Episode 169 is now available for download.

Driving a ground rod using water. Windows 3.0, GEOS, CPM, GEM and MS-DOS on a microcontroller. APRS FI explored. On our way to Dayton.


George Thomas, W5JDX, is co-host of AmateurLogic.TV, an original amateur radio video program hosted by George Thomas (W5JDX), Tommy Martin (N5ZNO), Peter Berrett (VK3PB), and Emile Diodene (KE5QKR). Contact him at [email protected].

Activate A Hoosier SOTA Summit (W9/IN-002)

We have been looking for an opportunity to activate a SOTA summit in our home state of Indiana. Joyce/K0JJW and I were both born there and misspent our youth there. Of course, you might be thinking “there are SOTA summits in Indiana?” Yes, there are three. Two of them are on public land, one is on private land and apparently inaccessible. These three summits are in the southern part of the state, not too far from the hills of Kentucky.

We were headed south towards the Smoky Mountains and passing through southern Indiana and decided to activate Jackson County HP (W9/IN-002). First, we camped at one of Indiana’s best state parks: Brown County State Park, about an hour away from IN-002. The next day we headed to the Jackson-Washington State Forest, where the summit is located. The Indiana Dept of Natural Resources supplies this trail map. As you’ll see, there are a number of trails that can take you to IN-002, but we chose the most direct route, starting at Knob Lake.

There is a State Forest campground around Knob Lake, so that would be another option for camping out.

The red line shows our track up to the summit, starting from Knob Lake.

We headed up a gated road that was labeled “Trails 2 and 3”. This road narrowed into a trail and we took a left turn at the Trail 2 sign. This is slightly tricky because Trail 2 goes off to the left and it continues on straight. The “left” Trail 2 ascends up to IN-002, for a total elevation gain of 465 feet and a distance of 0.7 miles. Go Left.

Once on top, we unpacked our recently purchased Icom IC-705 transceiver. This seemed like a good choice for this activation. While we were sure to try good old 2m FM, there was a good chance that we would get skunked on VHF at this rural and not-too-high summit. Sure enough, 2m FM was silent, even using the mighty 3-element Yagi antenna.

Next, we set up the end-fed halfwave for 20 meters, hoisted by the popular extendable fishing pole. OK, I admit that I had to do some fiddling around with the antenna to get the SWR to behave. Somehow, the test run at the campsite the day before was not sufficient. The SWR was way too high for the “I like 50 ohms” Icom, so some adjustments were required. After an unreasonable amount of fiddling, we put out an SSB signal on 20 meters that seemed good.

The band conditions were not great but they were not terrible. Calling CQ did not seem to work very well, so we tuned around and worked a number of Parks On The Air (POTA) stations to get our 4 QSOs. At that point, we declared victory and headed back down the hill.

This summit was easy to access and an easy hike. If you are in the area and want to knock out a Hoosier SOTA activation, this one is a great choice.

73 Bob K0NR

The post Activate A Hoosier SOTA Summit (W9/IN-002) appeared first on The KØNR Radio Site.

Bob Witte, KØNR, is a regular contributor to and writes from Colorado, USA. Contact him at [email protected].

LHS Episode #466: HamAnon

Hello and welcome to the 466th installment of Linux in the Ham Shack. In this short-topics episode, we discuss the ARDC's grant program for amateur radio clubs, the Hamvention mega prize, privacy in ham radio, Pop! OS, Fedora 26, Ubuntu 22.04 and a little bit about Hamshack Hotline. 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].

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