RA4CX — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Locator transmitted in a decoded message: LO21

Receiver-side FT8 activity involving RA4CX, decoded by SO8OO in southeastern Poland. 288 related FT8 messages, 6 CQ messages, observed on 160m, 80m, 40m, 20m, 10m, across 32 UTC dates. Heard between 2026-05-23 and 2026-08-21.

These are automated observations at the SO8OO receiver, not the station's official logbook. Times are UTC. Decoder S/N describes messages received at SO8OO; inferred entity and location data may be inaccurate for portable, remote or special-event operation.

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Overview

288

Related messages

CQ messages

UTC dates heard

-6 dB

Mean decoder S/N

Bands

80m 20m 40m 10m 160m

First seen: 2026-05-23
Last seen: 2026-08-21 15:25 UTC

Frequent QSO partners observed at SO8OO

Stations RA4CX worked most often, as logged from our receiver:

RM5F · European Russia ×3 R2SN · European Russia ×3 RK1N · European Russia ×2 RA4ADF · European Russia ×2 UB3LBU · European Russia ×2 RX7T · European Russia ×2 YO9PH · Romania ×2 UA9ZZ · Asiatic Russia R2YES · European Russia R3WDT · European Russia UB7K · European Russia R6TX · European Russia

Activity Heatmap

Locator transmitted by RA4CX

Approximate centre of LO21, decoded 2026-08-23 18:12 UTC. A transmitted locator is not proof of the operator's permanent location.

Observed FT8 exchanges

S/N cells show: decoded at SO8OO / report transmitted by the counterpart. An observed exchange is not a QSL or an official logbook confirmation.

Time UTC	Band	RA4CX S/N	Counterpart	Counterpart S/N	Msgs	Capture
08-23 18:07	40m	-2 / -	R2ZJJ/M	- / -13	5	Partial capture
08-23 18:06	40m	-3 / -	<...>	- / -	2	Partial capture
08-21 17:23	20m	- / -	SP6AXW	-9 / -	5	Partial capture
08-21 17:22	20m	-16 / -1	OM3CUP	-6 / -	3	✓ Closing observed
08-21 17:10	20m	- / -2	OM2BH	-6 / -	2	✓ Closing fragment
08-20 08:30	20m	-10 / -	UI6O	- / -	2	Partial capture
08-20 03:47	20m	- / +1	UN0GY	+3 / -	2	✓ Closing fragment
08-19 21:03	80m	- / -	DO9BAU	+5 / -	12	Partial capture
08-19 21:00	80m	-3 / -	R3DFE/M	- / -18	4	Partial capture
08-19 20:01	80m	- / +5	R3DFE/M	-9 / -	2	Partial capture
08-19 18:42	160m	-9 / -	R3DFE/M	- / -	5	Partial capture
08-18 21:10	80m	+2 / -	<...>	- / -18	3	Partial capture
08-17 20:49	160m	-15 / -	RA9UJ	- / -14	2	✓ Closing fragment
08-17 20:38	160m	-15 / -	<...>	- / -	4	Partial capture
08-17 20:32	160m	-21 / -	OH/SM5MRW	- / -21	2	Partial capture
08-17 20:18	40m	- / -5	DK7ZT	-10 / -	3	Partial capture
08-17 20:12	40m	- / -	RL3QGD	-12 / -	2	✓ Closing fragment
08-14 20:31	80m	+4 / +8	R50RKZ	+3 / +1	3	Partial capture
08-14 19:39	160m	-12 / -	R50RKZ	- / +4	2	Partial capture
08-14 18:04	160m	-19 / -	R2UZ/P	- / -12	2	Partial capture
08-13 21:17	80m	+1 / -3	RM5F	+6 / -	3	✓ Full exchange observed
08-13 21:15	80m	+4 / -	<...>	- / -7	2	Partial capture
08-13 20:57	160m	-6 / -	R3DFE/M	- / -19	9	Partial capture
08-13 20:43	160m	-8 / -	<...>	- / -21	4	Partial capture
08-12 16:27	80m	-15 / -	RI0FA	- / -	7	✓ Closing fragment
08-09 22:01	40m	-13 / -	D2ACE	- / -18	6	✓ Closing fragment
08-06 07:14	20m	-17 / -	<...>	- / -3	7	Partial capture
08-05 17:14	80m	-7 / -	<...>	- / -22	13	Partial capture
08-05 17:10	80m	-13 / -	UD7G	- / -	3	Partial capture
08-02 09:08	20m	-20 / -	<...>	- / -7	2	Partial capture
07-21 08:37	20m	-18 / -	R0TV	- / +2	3	✓ Closing fragment
07-18 10:58	10m	- / -5	R6AR	-6 / -	2	✓ Closing fragment
07-17 08:43	20m	-15 / -	<...>	- / -5	2	Partial capture
07-13 18:35	80m	+22 / -	R9CS/P	- / -	4	Partial capture
07-13 18:29	80m	+13 / -	R9CS/P	- / -	3	Partial capture
07-13 18:17	80m	-19 / -	<...>	- / -	3	Partial capture
07-13 12:24	10m	- / -	<...>	-9 / -	2	Partial capture
07-13 12:17	10m	- / -1	RT6Z	+4 / -	2	✓ Closing fragment
07-13 12:12	10m	- / +4	RY6O	-16 / -	2	✓ Closing fragment
07-13 10:08	10m	- / -19	R6FMK	-12 / -	2	✓ Closing fragment
07-12 18:12	10m	- / -13	RA3THN	-15 / -	3	✓ Closing fragment
07-12 09:21	20m	-16 / -	<...>	- / -10	2	Partial capture
07-12 09:15	20m	-16 / -	RY9KYL	- / -15	5	Partial capture
07-08 19:47	160m	+1 / +8	<...>	-3 / -4	5	Partial capture
07-08 19:42	160m	-4 / -	RO2E/M	- / -21	6	Partial capture
07-08 19:38	160m	-8 / -	<...>	- / -21	2	Partial capture
07-08 19:35	160m	-6 / -	<...>	- / -21	3	Partial capture
07-08 19:33	160m	-7 / -	RO2E/M	- / -21	7	Partial capture
07-08 19:32	160m	-4 / -	R6DOB/7	- / -21	2	Partial capture
07-08 19:30	160m	-5 / -	<...>	- / -	3	Partial capture

Recent FT8 messages decoded at SO8OO

Frequency values are decoder audio offsets in hertz, not RF frequencies.

40m

UTC    dB Audio  Message
213000 -13 2578  RA4CX RR73; PD0LBY <...> +00
200945 -12 2605  UB6LLI RA4CX -14
201200 -13 2605  RA4CX RL3QGD R+16 (x2)
201830 -10 1905  RA4CX DK7ZT -05 (x3)
180600  -5 1843  <...> RA4CX LO21 (x2)
180700  +0 2546  <R2ZJJ/M> RA4CX LO21 (x6)

20m

UTC    dB Audio  Message
071200  +0 1811  RA4CX R50RKZ -03
034715  +4 2735  RA4CX UN0GY +01 (x2)
083045  -9  980  UI6O RA4CX LO21 (x2)
171030  -6 1372  RA4CX OM2BH -02 (x2)
172215  -4 2163  RA4CX OM3CUP -01 (x2)
172300 -16 2164  OM3CUP RA4CX 73
172315  -9 2143  RA4CX SP6AXW JO80 (x5)

80m

UTC    dB Audio  Message
210045  -2 2143  R3DFE/M RA4CX LO21 (x3)
210300  +7 2502  RA4CX DO9BAU JO62 (x12)

160m

UTC    dB Audio  Message
203245 -23 1950  OH/SM5MRW RA4CX R-21 (x2)
203845 -17 2451  <...> RA4CX LO21 (x4)
204415 -11 2451  <R3DFE/M> RA4CX R-21
204445 -13 1359  <...> RA4CX R-21
204915 -16 1359  RA9UJ RA4CX R-14 (x2)
184245  -9 2607  <R3DFE/M> RA4CX LO21 (x5)

10m

UTC    dB Audio  Message
181200 -14 1048  RA4CX RA3THN -13 (x3)
100815 -15 1540  RA4CX R6FMK R-19 (x2)
121245 -19 1959  RA4CX RY6O +04 (x2)
121445  -9 2187  RA4CX RZ6L +02
121745  +4 2901  RA4CX RT6Z -01 (x2)
122400  -7 2295  RA4CX <...> +11
122430 -17 1939  RA4CX UI6L +00
122430 -11 2295  RA4CX <...> +11
105830  -7 1557  RA4CX R6AR -05 (x2)

Decoder S/N history by band

Daily averages across messages associated with this profile as decoded at SO8OO.