Hello all

for our coming 329th Coordinated Listening Event we are trying something new!

As you know, in our regular ‘Normal’ CLEs we listen within narrow frequency ranges.

We also have occasional ‘Special’ ones, each of which has its own different kind of listening challenge 
and usually covers the whole NDB frequency range or most of it. 

This time we would like to run an “ODD Channels Challenge” in which we all will be listening on ODD 
channels only in a 340 kHz wide frequency range.

Whether you are a regular CLE listener, an occasional one, or have never sent a CLE log, everyone is 
welcome to join us in this event.

 
Days:                   Friday 26 June – Monday 29 June
Times:                  Start and end at midday, LOCAL time at the receiver
Range:                  190 – 530 kHz
Target:                 NDBs heard on any ODD channel (e.g. 301 kHz, 303 kHz, 305 kHz, etc.)

 
Please join us wherever you are - just log the NDBs you can identify having  their nominal frequencies in the advertised range.

UNIDs and NDBs on any carrier frequency which is 'half-way'  (e.g. 267.5, 333.5, 386.5 kHz, etc.) are excluded this time.

 
You might be wondering why the frequency range 190 – 530 kHz was chosen.

530 kHz is the highest frequency at which an active NDB signal can be received in North America.

It therefore seemed sensible to limit the frequency range for all participants to the maximum frequency of 530 kHz.
 
For this range Rxx shows 193 Beacons on 75 odd channels which have recently been logged from North America and 392 Beacons 
on 109 odd channels from Europe (shown as logged since 01.01.2026). Despite the short nights in the northern hemisphere and 
conditions that are likely to be anything but ideal, this should enable everyone to pick up a few signals.

And, of course, we will also be running an “EVEN Channels Challenge” in one of our future CLEs!


Please look out for our full 'Final Details' this coming Wednesday.

That will include advice about the NDBs to listen for, how to present your log, etc.


Joachim

(CLE Coordinator)