RX4CK — reception at SO8OO

Signals decoded by SO8OO in southeastern Poland. FT8 and CW have separate histories; all times are UTC.

FT8 activity

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LO11

Receiver-side FT8 activity involving RX4CK, decoded by SO8OO in southeastern Poland. 289 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, 10m, across 10 UTC dates in the available aggregate history. Observed between 2026-06-18 and 2026-10-27.

These are automated observations at the SO8OO receiver, not an official contact log. Times are UTC. Attribution follows decoded FT8 message structure: CQ uses the first token and directed-looking messages use the second. Free text that resembles a directed message can be attributed imperfectly. Summary S/N reflects propagation plus SO8OO receiver, antenna and local-noise conditions. Counts are not adjusted for monitoring outages; transmissions that were not decoded are absent. Inferred entity and location data may be inaccurate for portable, remote or special-event operation.

SO8OO decoded 289 FT8 messages attributed to RX4CK as the transmitting token by decoded message structure across 10 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (88%), followed by 40 m (9%) and 10 m (2%). Most decodes (89%) fell within the six-hour window 15:00-21:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's strong S/N range (75%); the estimated median was -6 dB.

Overview

289

Messages attributed

UTC dates decoded

Active 15-min windows

-6 dB

Estimated median S/N

Bands

80m · 255 40m · 25 20m · 2 10m · 7

First attributed message: 2026-06-18
Last attributed message: 2026-10-27 20:13 UTC

Observed FT8 message patterns

Attributed sample: 289 messages
Active dates: 10 UTC dates
Estimated median S/N: -6 dB
Estimated 10th-90th percentile: -11 to 0 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 4, moderate (-15 to -9 dB) 68, strong (≥ -8 dB) 217.

WSJT-X defines S/N reports against a 2,500 Hz reference noise bandwidth. The ranges above are SO8OO receiver-side display categories, not official WSJT-X classes, transmitter-power measurements or estimates of how easy the station is to hear elsewhere. Statistics include only successful decodes on SO8OO's monitored FT8 channels; transmissions that were not decoded are absent.

Frequent counterpart tokens observed at SO8OO

Tokens most often paired with RX4CK in decoded directed-looking exchanges:

EU1EU · Belarus ×2 RA1TR · European Russia ×2 RU3OH · European Russia ×2 EW7LZ · Belarus R1TET · European Russia R2SN · European Russia R3LCG · European Russia R4UAS · European Russia RW3ZR · European Russia UA3WG · European Russia UA4FOH · European Russia UB4HPQ · European Russia

Attributed messages by UTC hour

Rolling 90-day UTC chart window. Counts follow decoded message structure: the first token for CQ, or the second token in a directed-looking message.

Most frequent locator attributed to RX4CK

The map compares the centres and boundaries of the locator field attributed to this token by decoded message structure, 2° × 1° as a Maidenhead square, and SO8OO's six-character receiver square. The separation is not an exact antenna-to-antenna distance or a radio-path length.

Attributed locator: LO11 · 141 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,498 km (approx.)
Last such locator decoded: 2026-10-27 20:13 UTC

A decoded locator can describe portable, remote or special-event operation and is not proof of a permanent station address or transmitter identity.

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	RX4CK S/N	Counterpart	Counterpart S/N	Msgs	Capture
10-27 20:13	80m	- / -23	DO8JB	-2 / -	4	✓ Closing fragment
10-27 20:11	80m	- / +7	DH0BRO	+5 / -	2	Partial capture
10-27 19:51	80m	- / -	DL6RU	+2 / -	8	Partial capture
10-27 19:49	80m	- / -12	9A3MA	+4 / -	4	✓ Closing fragment
10-27 19:38	80m	- / -2	R3KDT	-7 / -	3	✓ Closing fragment
10-27 19:33	80m	- / +2	R4DD	-6 / -	2	✓ Closing fragment
10-27 19:19	80m	- / -	DH0BRO	+2 / -	3	Partial capture
10-26 21:36	80m	-11 / -	RW6HP	- / -1	2	Partial capture
10-26 21:32	80m	- / +2	RA9FUE	-21 / -	3	✓ Closing fragment
10-07 19:16	80m	-9 / -	R1BLO/P	- / -16	2	Partial capture
10-07 19:09	80m	- / -	PA3FPQ	0 / -	3	Partial capture
10-07 19:05	80m	-6 / -	R4CEC	- / -10	2	✓ Closing fragment
10-07 19:04	80m	- / -11	9A3K	+7 / -	3	✓ Closing fragment
10-07 18:59	80m	-6 / -9	DO5UH/P	+9 / -16	7	✓ Full exchange observed
10-07 18:58	80m	- / -	PA3FPQ	+2 / -	2	Partial capture
10-07 18:58	80m	-6 / -	SP5KG	+8 / -19	2	Partial capture
10-07 18:57	80m	-4 / -	RX4SA	- / -1	2	✓ Closing fragment
10-07 18:55	80m	-6 / -5	SP1MGM	+11 / -13	5	✓ Full exchange observed
10-07 18:51	80m	-8 / -	R3KLE	-5 / -10	5	✓ Full exchange observed
10-07 18:50	80m	- / -	EU7DBF	-12 / -	2	Partial capture
10-07 18:48	80m	-4 / -	R1QBQ	- / -18	2	✓ Closing fragment
10-07 18:11	80m	- / -1	RA3DAD	0 / -	3	✓ Closing fragment
10-07 18:10	80m	- / -3	RA5AK	-6 / -	2	✓ Closing fragment
10-07 18:07	80m	-8 / -	RA3RPW	- / -6	2	✓ Closing fragment
10-07 16:01	80m	- / -	RA7E	-4 / -	3	Partial capture
10-07 15:59	80m	-2 / -	R8LCA	- / -14	2	✓ Closing fragment
10-07 15:56	80m	-1 / -	R9MBC	- / -15	3	✓ Closing fragment
10-07 15:52	80m	-3 / +3	RA6MQ	-15 / -	7	✓ Closing observed
10-07 15:51	80m	-4 / -	RU3OH	-13 / -	2	✓ Closing observed
10-07 15:51	80m	-6 / -6	UN7LAN	-18 / +1	6	✓ Full exchange observed
10-07 15:43	80m	-4 / -	R0ADK	- / -15	3	✓ Closing fragment
10-07 15:40	80m	-2 / -11	RZ0SW	-16 / -9	3	✓ Full exchange observed
10-07 15:39	80m	-6 / -3	RA1TR	+14 / -	3	✓ Closing observed
10-07 15:38	80m	-5 / +3	R3YBG	-14 / -14	5	✓ Full exchange observed
10-07 15:18	40m	-12 / -2	R3LCG	-6 / -	6	✓ Closing observed
10-07 15:17	40m	- / 0	R4UAS	-12 / -	3	✓ Closing fragment
10-07 15:16	40m	- / -5	UA3WG	-7 / -	2	✓ Closing fragment
10-07 15:12	40m	- / -16	RU3OH	-14 / -	3	✓ Closing fragment
10-07 15:10	40m	-6 / -	UD1I	- / -16	2	✓ Closing fragment
10-07 15:09	40m	-10 / -	R1TET	- / 0	2	✓ Closing fragment
10-07 15:05	40m	-5 / +2	RA1TR	-2 / -	5	✓ Closing observed
10-07 11:03	40m	- / -3	EW7LZ	-5 / -	3	✓ Closing fragment
10-07 10:48	40m	- / -	EU1EU	-10 / -	2	✓ Closing fragment
09-12 21:03	80m	- / -	DO2HC	-10 / -	2	Partial capture
09-12 21:00	80m	-8 / -	R4HLO	- / -2	2	✓ Closing fragment
09-12 20:59	80m	-8 / -	R8CC	- / -2	2	✓ Closing fragment
09-12 20:39	80m	- / -	PF1B	-10 / -	2	Partial capture
09-12 20:34	80m	- / -19	ON5AM	-1 / -	4	Partial capture
09-12 20:34	80m	-5 / -	RV3IN	+3 / -9	6	✓ Full exchange observed
09-12 20:34	80m	-1 / -	TA4RC	-13 / -11	3	✓ Closing observed

Recent FT8 messages decoded at SO8OO

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

80m

UTC    dB Audio  Message
195300  +4 1325  RX4CK DL6RU JN48 (x5)
200230  +7 2222  RX4CK IQ4JO JN63
200230  -3 1114  RX4CK DO8JB JO32
201100  +6 1111  RX4CK DH0BRO JO62 (x2)
201245 -20 1114  CQ RX4CK LO11 (x2)
201330  -1 1114  RX4CK DO8JB JO32 (x4)

40m

UTC    dB Audio  Message
151315 -14 1850  RX4CK RU3OH 73
151645  -5  675  RX4CK UA3WG R-05 (x2)
151715 -13 2658  RX4CK R4UAS KO85
151815  -7 2347  RX4CK R3LCG KO64
151845 -12 2658  RX4CK R4UAS R+00
151845  -9 2348  RX4CK R3LCG KO64
151915 -12 2658  RX4CK R4UAS 73
151915  -4 2348  RX4CK R3LCG KO64 (x2)
152000 -12  675  R3LCG RX4CK RR73
152015  -1 2347  RX4CK R3LCG 73
152100  -9  675  CQ RX4CK LO11 (x2)
152315  -4 1130  RX4CK R2SN RR73

20m

UTC    dB Audio  Message
083545  +7 2546  <...> RX4CK -07

Decoder S/N history by band

Count-weighted daily averages across messages attributed to this profiled token and successfully decoded at SO8OO, limited to the rolling 90-day UTC chart window.

CW

No CW receptions recorded for this callsign in the last 30 days.

Explore CW reception at SO8OO

FT8DB and SO8OO WebSDR are a hobby project maintained solo. ☕ Buy me a coffee