R4CGK — FT8 activity observed at SO8OO

DXCC entity inferred from callsign: European Russia Most frequent locator attributed to this token: LO21

Receiver-side FT8 activity involving R4CGK, decoded by SO8OO in southeastern Poland. 121 FT8 messages attributed to this token as transmitter, on 80m, 40m, 20m, across 9 UTC dates in the available aggregate history. Observed between 2026-07-02 and 2026-09-17.

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 121 FT8 messages attributed to R4CGK as the transmitting token by decoded message structure across 9 UTC dates in the available aggregate history. The largest monitored-band total was 80 m (64%), followed by 40 m (31%) and 20 m (5%). Most decodes (93%) fell within the six-hour window 15:00-21:00 UTC. Most successfully decoded messages attributed to this token fell in SO8OO's weak S/N range (82%); the estimated median was -19 dB.

Overview

121

Messages attributed

UTC dates decoded

Active 15-min windows

-19 dB

Estimated median S/N

Bands

80m · 77 40m · 38 20m · 6

First attributed message: 2026-07-02
Last attributed message: 2026-09-17 16:39 UTC

Observed FT8 message patterns

Attributed sample: 121 messages
Active dates: 9 UTC dates
Estimated median S/N: -19 dB
Estimated 10th-90th percentile: -24 to -14 dB
Recurring-pattern threshold: Met

SO8OO display ranges among successful decodes: weak (≤ -16 dB) 99, moderate (-15 to -9 dB) 21, strong (≥ -8 dB) 1.

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 R4CGK in decoded directed-looking exchanges:

ES2AJ · Estonia ×3 R2PT · European Russia ×2 R6YG · European Russia ×2 RA3ZOM · European Russia ×2 RN6MA · European Russia 9A7Y · Croatia DL1ECG · Fed. Rep. of Germany E70SZ · Bosnia-Herzegovina G6LEE · England IK4RVY · Italy R2DVU · European Russia R2FDU · Kaliningrad

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 R4CGK

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: LO21 · 93 decoded messages
SO8OO receiver locator: KN09VW
Locator-centre separation: 1,636 km (approx.)
Last such locator decoded: 2026-09-17 16:39 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	R4CGK S/N	Counterpart	Counterpart S/N	Msgs	Capture
09-17 16:34	40m	- / -4	RC2Y	-9 / -	3	✓ Closing fragment
09-17 14:49	40m	- / -12	RZ7KR	+4 / -	2	✓ Closing fragment
09-08 17:45	80m	-19 / -	UA0TP	- / -	4	Partial capture
09-08 17:35	80m	-21 / -	R8OAE	- / -	2	Partial capture
09-08 17:29	80m	-20 / -	R9CS/P	- / -12	2	Partial capture
09-08 17:22	80m	- / -12	R3MBV	-13 / -	3	✓ Closing fragment
09-08 17:20	80m	- / -5	R4CBE	0 / -	2	✓ Closing fragment
09-08 16:48	80m	- / -10	RC6OZ	-5 / -	4	✓ Closing fragment
09-08 16:43	80m	- / -11	R7DX	+6 / -	4	✓ Closing fragment
09-08 16:41	80m	- / -15	RN3AOE	-14 / -	2	✓ Closing fragment
09-08 16:38	80m	- / -8	UA3PAB	-5 / -	3	✓ Closing fragment
09-08 16:36	80m	-20 / -13	R2DRE	-21 / -3	3	✓ Full exchange observed
09-08 16:33	80m	- / -11	R4UA	-2 / -	4	✓ Closing fragment
09-08 16:33	80m	- / -13	RQ3M	+1 / -	4	✓ Closing fragment
08-27 14:23	20m	- / -17	R4CI	+1 / -	2	Partial capture
08-27 13:50	20m	- / -15	BG0FQU	-18 / -	2	Partial capture
08-24 18:04	40m	-20 / -15	DL1ECG	-17 / -18	9	✓ Full exchange observed
08-24 17:37	40m	-8 / -	D2ACE	- / -	2	Partial capture
08-24 17:26	40m	- / +3	RW6B	-2 / -	3	✓ Closing fragment
08-24 17:22	40m	- / -11	UC6D	+2 / -	2	✓ Closing fragment
08-24 17:19	40m	-12 / -	RN3ZBX	+11 / -4	2	✓ Closing observed
08-24 16:14	40m	- / -12	RX3AJM	-17 / -	3	✓ Closing fragment
08-24 16:10	40m	- / -	RK4UZ	-8 / -	2	✓ Closing fragment
08-24 16:04	40m	- / -10	UA3RLE	-12 / -	2	✓ Closing fragment
08-23 17:01	40m	-17 / -6	RM3ZR	-3 / +3	4	✓ Full exchange observed
08-23 16:40	40m	- / -8	ES2AJ	-2 / -	2	✓ Closing fragment
08-23 16:12	40m	-19 / -	R2HE	-7 / -	2	✓ Closing observed
08-15 17:30	40m	- / -17	OH3MB	-20 / -	2	Partial capture
08-11 17:52	40m	- / -15	R2DVU	-16 / -	2	✓ Closing fragment
08-07 17:02	40m	- / -8	RW6MZ	-20 / -	2	✓ Closing fragment
08-04 17:33	40m	- / -10	UB3YGA	-8 / -	2	✓ Closing fragment
08-04 16:44	40m	- / -6	R6YG	-22 / -	3	✓ Closing fragment
08-04 16:41	40m	- / -10	R6FMK	-21 / -	3	✓ Closing fragment
07-31 17:54	40m	- / -	SM7JKW	-16 / -	4	Partial capture
07-31 17:48	40m	- / -15	UA3WG	-20 / -	3	✓ Closing fragment
07-30 20:50	80m	-12 / -	YE4FNN	- / -	2	Partial capture
07-30 20:45	80m	-24 / -20	OE6TNO	+2 / -22	3	✓ Full exchange observed
07-30 20:42	80m	- / -	DG4BZ	-1 / -	2	Partial capture
07-30 20:42	80m	-22 / -6	UA3GIU	+10 / -	3	✓ Closing observed
07-30 20:40	80m	-24 / -	RC6OD	- / -	2	Partial capture
07-30 20:38	80m	-9 / -8	RA4ADF	-19 / -3	4	✓ Full exchange observed
07-30 20:23	80m	-19 / -	SP5CWC	+6 / -10	3	Partial capture
07-30 20:17	80m	-17 / -16	UA9ZZ	-20 / -6	7	✓ Full exchange observed
07-30 20:15	80m	-14 / -17	M0GDX	-9 / -15	6	✓ Full exchange observed
07-30 20:09	80m	- / -8	UA3TJC	-5 / -	3	✓ Closing fragment
07-30 20:07	80m	-16 / -	R2PT	-6 / -12	3	✓ Closing observed
07-30 19:59	80m	- / -	R1TAX	+2 / -	2	✓ Closing fragment
07-30 19:50	80m	- / -13	EW8G	+13 / -	5	✓ Closing fragment
07-30 19:24	40m	- / -14	R2FDU	-14 / -	3	✓ Closing fragment
07-27 18:12	40m	- / -4	R5AV	-14 / -	2	✓ Closing fragment

Recent FT8 messages decoded at SO8OO

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

40m

UTC    dB Audio  Message
155030 -24 1695  CQ R4CGK LO21                         a1
161830 -13 1325  R4CGK R6XW 73
144900  +5  549  R4CGK RZ7KR -12 (x2)
161200 -16 1816  CQ R4CGK LO21 (x3)
163215 -12 1269  R4CGK RL3QGR R-14
163445  -8 1816  R4CGK RC2Y KO73 (x3)
163630 -24 1815  CQ R4CGK LO21                         a1 (x2)
163930 -18 1815  UB4RID R4CGK -07
164345  +2  738  R4CGK R6CW RR73

80m

UTC    dB Audio  Message
173245 -18 1664  CQ R4CGK LO21 (x4)
173545 -20 1664  R8OAE R4CGK LO21 (x2)
173815 -15 1664  CQ R4CGK LO21 (x5)
174530 -19 1663  UA0TP R4CGK LO21 (x4)

20m

UTC    dB Audio  Message
131700 -15 1596  R4CGK R6DVV R-04
112100 -16 2114  R4CGK RN6MA -04 (x2)
112400 -24 1504  R4CGK SV9MBH KM25 (x2)
151915 -21 1640  TN8GD R4CGK LO21
134245 -24 1706  RI1FJL R4CGK LO21
135000 -20 1516  R4CGK BG0FQU -15 (x2)
142115 -18 1686  CQ R4CGK LO21
142300  +3 2114  R4CGK R4CI -17 (x2)
142630 -21 1685  CQ R4CGK LO21 (x2)
144345 -22 1688  GM6NX R4CGK LO21

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.

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