Czech DXpedition (CDXP) is a long-standing project of a group of Czech radio amateurs who systematically organize DX expeditions to rare and hard-to-reach areas. DXCC entity, predovšetkým v Afrike a Karibiku. Webová stránka projektu na adrese cdxp.cz documents the history of expeditions from 2012 to the planned expedition for 2026.
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Why radio amateurs organize DX expeditions
DXCC (DX Century Club) is an ARRL award system that recognizes connections with various countries and territories of the world - so-called entities. Many of these entities are uninhabited islands, countries with minimal amateur radio infrastructure, or territories where licensed operators almost do not exist. For an ordinary radio amateur on another continent, such an entity is practically unreachable other than through a DX expedition - a group of operators who travel to a given location at their own expense and with their own equipment, set up a temporary station there, and for several days to weeks work on all available bands and modes in such a way as to allow as many stations around the world as possible to log this QSO.
Organizing such an expedition involves obtaining licenses and permits from local authorities, transporting hundreds of kilograms of radio equipment and antenna systems, arranging accommodation and transportation in often isolated locations, and financing through sponsors and donors from DX clubs and individual radio amateurs. The CDXP team has been going through these steps repeatedly since 2012.
CDXP Expeditions Overview
For more than ten years, CDXP has conducted expeditions to entities in West, Central and East Africa, the Indian Ocean and the Caribbean.
| Year | Country/entity | Call sign |
|---|---|---|
| 2012 | Albania | ZA/OK6DJ |
| 2013 | Burkina Faso | XT26DJ and XT2FCJ |
| 2014 | St. Eustatius | PJ5/OL8R |
| 2015 | Zimbabwe | Z21MG |
| 2016 | Chambers | D66D |
| 2017 | Togo | 5V7P |
| 2017 | Mauritania | 5T5OK |
| 2018 | Kosovo | Z66D |
| 2018 | Mayotte | TO6OK |
| 2019 | San Andres | 5K0K |
| 2020 | Ivory Coast | TU5PCT |
| 2021 | Saint Thomas | S9OK |
| 2022 | Ivory Coast | TU5PCT |
| 2023 | Congo (Brazzaville) | TN8K |
| 2023 | Uganda | 5X3K |
| 2024 | Liberia | A8OK |
| 2026 | Mozambique | C8K |
The core of the team consists of operators OK1BOA (Petr), OK1FCJ (Petr), OK1CRM (Palo), OK1GK (Pavel), OK2ZA (Ruda), OK2ZC (Ludek), OK2ZI (Karel) and OK6DJ (David), who have repeatedly participated in individual expeditions in various formations since 2016. Operators OK1FPS, 5T0JL and 5T2AI (Mauritania 2017) and HK3CW (San Andrés 2019) also participated in older expeditions.
Current expedition: C8K Mozambique 2026
The team's latest expedition heads to Mozambique as C8KThe team's arrival is scheduled for November 9, with departure on November 20, 2026. Station construction and limited prevádzka prebehne 10.–11. novembra, plná prevádzka 12.–18. novembra, demontáž 19.–20. novembra 2026.
The operators will be Petr OK1BOA, Petr OK1FCJ, Palo OK1CRM, Pavel OK1GK, Ruda OK2ZA, Ludek OK2ZC, Karel OK2ZI and David OK6DJ. Operating modes: SSB, CW, RTTY, FT8, FT4, PSK. Pásma: 160–6 m vrátane 60 m, plus QO-100. Pri dostupnosti internetu plánuje tím využiť Club Log Live Stream.
| Category | Equipment |
|---|---|
| Transceivers | 1× Elecraft K3, 2× Kenwood TS480HX, 1× SunSDR2DX, 1× SunSDR PRO, 4× Icom 705, 1× Yaesu FTdx10 |
| Final stages | 6× JUMA PA1000 |
| Antenna 6 m | 5-element yagi |
| Antenna 10 m | 4-element Yagi |
| 10–15–20 m including WARC | 3× spider beam |
| 17/15/12 m | 2-element Yagi |
| 30 m | 2× phased vertical |
| 40 m | 2× phased vertical |
| 80 m | Vertical + 10 radials |
| 160 m | Vertical + 10 radials |
| RX antennas | 3× beverage + RX vertical, focusing on low bands |
QSL pre C8K je výhradne via OK6DJ, cez OQRS a LoTW. Medzi platinovými sponzormi expedície figurujú OK5MM, OG2M, OK1CF, KA1R, W9EWZ, DL5NDH, JA8UIV a OK1FPS; medzi zlatými DL4APJ, OK1ALX a OK1DXW; medzi striebornými JA4DND, OK2NMA, OK1TRJ, OK2DA, OK2IT, OK1LN, N9MB, M0TNX, S58N, OO4M a DK6SP. Príspevky je možné zaslať cez Club Log donation systém alebo priamym bankovým prevodom na účet vedený na meno Davida Berana (IBAN CZ1155000000001021181386, BIC RZBCCZPP).
Previous expedition: A8OK Liberia 2024
The Liberia expedition took place from 5 to 19 April 2024 under the call sign A8OK. Full operation took place from 9 to 16 April, with construction and dismantling on the off-days. The team consisted of the same operators as for the C8K expedition. Bands: 160–6 m including 60 m, plus QO-100, RS-44 and IO-117 (satellite bands). The live stream was available on club log.org/livestream/A8OK.
The equipment included the same configuration of transceivers and power stages as the C8K (1× Elecraft K3, 2× Kenwood TS480HX, SunSDR2DX, SunSDR PRO, 4× Icom 705, Yaesu FTdx10, 6× JUMA PA1000 + 1× Expert). The antenna system was identical to the C8K – 5-element Yagi on 6 m, 4-element on 10 m, 3× Spiderbeam for 10-15-20 m including WARC, 2-element Yagi on 17/15/12 m, phased verticals on 30 and 40 m, verticals with 10 radials on 80 and 160 m, with a receive system of 3× Beverage + RX vertical. The NCDXF provided a grant of 2,000 USD to the expedition, led by leaders David OK6DJ and Karl OK2ZI.
Expedition to Uganda: 5X3K (2023)
The 5X3K expedition ran from September 28 to October 8, 2023, with full operations from October 1–6.
Operátormi boli Petr OK1BOA, Petr OK1FCJ, David OK6DJ a Rudolf OK2ZA. Módy: SSB, CW, RTTY, FT8. Antény: inverted L na 160 m, vertikály na 80/60/40/30 m, 2× Spiderbeam na 20/17/15/12/10 m a DX Commander. Equipment: K3, TS480, IC705, SunSDR2DX, SunSDR Pro2, 3× JUMA PA. QSL via OK6DJ, OQRS, LoTW.
Republic of Congo: TN8K (2023)
Expedícia TN8K (Kongo-Brazzaville) sa konala na začiatku roku 2023 s rovnakou základnou zostavou operátorov ako pri novších expedíciách (OK1BOA, OK1FCJ, OK1CRM, OK1GK, OK2ZA, OK2ZC, OK2ZI, OK6DJ). Vybavenie: 2× Elecraft K3, 3× Kenwood TS480HX, SunSDR2DX, 2× Icom 705, 5× JUMA PA1000. Antény: 4-prvková Yagi na 6 m, 3× Spiderbeam na 10-15-20 m vrátane WARC, 2-element Yagi na 17/12 m, phased verticals na 30 a 40 m, vertikály s 10 radiálmi na 80 a 160 m, receive systém 3× Beverage + RX vertical so zameraním na nízke pásma. QSL via OK6DJ, OQRS, LoTW.
Historical expeditions (2012–2022)
The oldest CDXP expedition was to Albania in 2012 with the callsign ZA/OK6DJ. In 2013, Burkina Faso (XT2) followed, in 2014 Sint Eustatius in the Caribbean (PJ5/OL8R), in 2015 Zimbabwe (Z21MG) and in 2016 Comoros (D66D). 2017 brought two expeditions – Togo (5V7P) and Mauritania (5T5OK, during which the team lost operator 5T0JL, who became a silent key during their stay). In 2018, Kosovo (Z66D) and Mayotte (TO6OK) followed, in 2019 San Andrés in the Caribbean (5K0K) and in 2020 and again in 2022 Ivory Coast (TU5PCT). 2021 belonged to the expedition to São Tomé (S9OK).
For each of these expeditions, the cdxp.cz website maintains a separate section with news, a photo gallery, a list of sponsors, and in many cases a detailed expedition story, including an online log from the time of operation.
QSL manager
Pre všetky expedície CDXP je QSL managerom David Beran, OK6DJ, na adrese Dolní Kamenice 55, 34562 Holýšov, Česká republika. Tím dôrazne odporúča používať Club Log OQRS pre direct aj bureau QSL žiadosti – žiadosti poštou ani cez bureau priamo nie sú akceptované, OQRS je rýchlejšie, lacnejšie a jednoduchšie.
OK6DJ as QSL manager covers, in addition to CDXP expeditions, a number of other call signs: T8OK, PJ7K, 3B9DJ, OL5WWA, VK9CV, 3B8/OK6DJ, 3B7M and several other prefixes associated with personal OK6DJ journeys (KH6, T7, W6, W8, SV5, SV8, SV9, HB0, TA4, OE2, OM, 4O6DJ).
Podmienky QSL výmeny: OQRS direct nahraniedo LoTW prebieha týždenne. Direct QSL vyžaduje minimálne 4 USD alebo 2 IRC, akceptované do konca roku 2026. Poštové známky sa neprijímajú. LoTW, QRZ.com a eQSL sa nahrávajú do 6 mesiacov od expedície. OQRS cez bureau platí 6 mesiacov, papierové QSL cez bureau 12 mesiacov. Kontaktný e-mail pre QSL: qso@Email.cz, pre tím: info@cdxp.cz.
Video from the A8OK Liberia expedition
The following video captures the reception of the A8OK station on the 21.300 MHz frequency, 15 m band, USB mode in split operation during an expedition to Liberia in April 2024:
Team tracking
Current information on the progress of expeditions, including daily updates, photo galleries a online logov, zverejňuje tím na webe cdxp.cz a na Facebook skupine Czech DXpedition. Pri expedíciách s dostupným internetovým pripojením je k dispozícii aj Club Log Live Stream, ktorý umožňuje sledovať prevádzku v reálnom čase.