CDXC, the UK DX Foundation, supports DXing and operating excellence on the HF spectrum. As part of CDXC's activities, Club Log provides support for three distinct DXing challenges, designed to stimulate activity and reward members for their achievements.
| LF Challenge 1 March - 31 March 2026 160m, 80m, 40m |
DX Marathon Challenge 1 January - 31 December annually 160m to 6m |
HF Challenge 1 September - 30 September 2026 15m, 12m, 10m, 6m |
How to participate
To join any of the three challenges, go to your Settings page, and click on the Clubs tab. Select the challenge or challenges in which you would like to participate and add yourself. Important note: you must be an approved member of the CDXC club first. You will not see the option to join the challenges unless you are an approved member.
Please allow up to 24 hours after joining for your log to be included, and remember that if you are not already a CDXC member you will not be able to join the CDXC Challenges and will not see them in the Settings > Clubs page.
The LF Challenge
March - 160m, 80m, 40m
The Penallt Trophy, given in memory of Allan Phillips, GW0BIC, is awarded to the CDXC member who works the most DXCC entities on the 160m, 80m and 40m bands during the month of March each year.
The HF Challenge
September - 15m to 6m
The HF Challenge seeks to stimulate DXing on the high HF ham bands, from 15m to 6m inclusive (where permitted) during September.
The CDXC DX Marathon Challenge
12 months - all bands, 160m to 6m
The DX Marathon Challenge is a year-long challenge starting at midnight on 1 January annually. The objective is to work as many DXCC entities as possible during the year.